+ All Categories
Home > Documents > VOLUME - IIA

VOLUME - IIA

Date post: 16-Feb-2022
Category:
Upload: others
View: 8 times
Download: 0 times
Share this document with a friend
83
TECHNICAL SPECIFICATIONS WATER TREATMENT PACKAGES 1X 500 MW FGUTPP, STAGEIV,UP BHEL SPEC. NO. : PETS404158A001 TECHNICAL SPECIFICATION NBPPL SPEC. NO.: NBPPL-004-104-00-P4M-A NTPC-BHEL POWER PROJECTS PRIVATE LIMITED TECHNICAL SPECIFICATIONS OF WATER TREATMENT PACKAGES FOR 1X 500 MW FGUTPP, STAGE-IV, UP VOLUME - IIA OWNER: NTPC LIMITED ARCHITECT ENGINEERING FIRM BHARAT HEAVY ELECTRICALS LIMITED Project Engineering Management Power Sector, PPEI Building Sector-16A, Noida-210301 NP-1
Transcript

 

  

 TECHNICAL SPECIFICATIONS 

WATER TREATMENT PACKAGES 1X 500 MW FGUTPP, STAGE‐IV,UP 

 

BHEL SPEC. NO. : PE‐TS‐404‐158‐A001

TECHNICAL SPECIFICATION

NBPPL SPEC. NO.: NBPPL-004-104-00-P4M-A

NTPC-BHEL POWER PROJECTS PRIVATE LIMITED

TECHNICAL SPECIFICATIONS OF

WATER TREATMENT PACKAGES FOR

1X 500 MW FGUTPP, STAGE-IV, UP

VOLUME - IIA

OWNER: NTPC LIMITED

ARCHITECT ENGINEERING FIRM BHARAT HEAVY ELECTRICALS LIMITED

Project Engineering Management Power Sector, PPEI Building

Sector-16A, Noida-210301

NP-1

 

  

 TECHNICAL SPECIFICATIONS 

WATER TREATMENT PACKAGES 1X 500 MW FGUTPP, STAGE‐IV,UP 

 

BHEL SPEC. NO. : PE‐TS‐404‐158‐A001

TECHNICAL SPECIFICATION

NBPPL SPEC. NO.: NBPPL-004-104-00-P4M-A

TABLE OF CONTENTS

VOLUME SECTION TITLE PAGE NO

IIA ANNEXURE I ADDENDUM NP3-NP4

IIA ANNEXURE II TECHNICAL AMENDMENTS

LIST OF TECHNICAL AMENDMENTS NP5-NP9

SUB SEC-I, SPECIAL TECHNICAL

REQUIREMENT (MECH)

NP10-NP35

SUB SECTION III - DATA SHEET NP36-NP50

SUB SECTION V - TERMINAL POINTS NP51-NP54

SUB SECTION VI - FUNC. GUARANTEES NP55-NP60

P&ID PT PLANT REV. 01 NP61

P&ID RO-DM PLANT REV. 01 NP62

PLOT PLAN-PE_DG_401_100_M001_R2 NP63

AMENDMENTS FOR GTR NP64-NP79

IIA ANNEXURE III TECHNICAL CLARIFICATIONS NP80-NP83

NP-2

Annexure-I (Addendum)

NP-3

Annexure-I (Addendum)

NP-4

NP-5

NP-6

NP-7

NP-8

NP-9

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 2 OF 71

1.0 SPECIFIC TECHNICAL REQUIREMENTS

1.1 PRE-TREATMENT PLANT & LIQUID EFFLUENT TREATMENT (LET) SYSTEM (REFER ENCLOSED P & ID FOR PRETREATMENT PLANT AND P&ID FOR LET SYSTEM) Bidder to note that Pre-treatment Plant & LET System shall be a complete system which shall include associated Civil, Mechanical, Electrical, Control & instrumentation work. All the work i.e. Mechanical work, C&I, Electrical works (refer electrical, C&I for respective scope), CIVIL work (except for waste service water sump & pump house of LET system) shall be in the scope of bidder. Broad scope of supply has been listed below:-

i. Raw water inlet piping to aerator complete with piping, fitting and valves. The inlet piping is to include motorised butterfly type control valve with necessary manual isolation/control valve and necessary instrumentation.

ii. Channel from Aerator to Stilling Chamber as per P & ID enclosed for pre-treatment plant. iii. One no. Stilling Chamber with instrumentation. iv. Three (3) nos. parshall flumes with instrumentation. v. Three (3) nos. Inlet Chambers. vi. Two (2) nos. PT-CW High Rate Solid Contact Type Clarifiers and One (1) no. PT-DM High Rate Solid

Contact Type Clarifier with sampling points at different elevation of clarifiers. vii. Clarifier bridge assemblies, hand railings, required motors, valves, piping, instrumentation etc. viii. One (1) no. two storey chemical house building. ix. Sludge disposal system from clarifiers with piping, valves, instrumentation up to sludge collection pit as

indicated in P & ID of Pre-treatment plant. x. One (1) no. RCC Sludge Pit (in twin section) with common sump interconnected through valves. xi. Two (2) nos. Sludge Disposal Pumps with piping, valves, fittings and instrumentation up to Ash Slurry

Sump. xii. PT CW-Clarified Water channel up to Clarified Water Distribution Chamber & PT-CW Clarified Water

Storage Tank. xiii. PT-DM Clarified Water Channel up to PT-DM Clarified Water Storage Tank. xiv. One (1) no. PT-CW Clarified Water Storage Tank & Pump House and One (1) no. PT-DM Clarified

Water Storage Tank & Pump House. xv. Two nos. (2 x 50%) Pressure Sand Filters for PT-CW Clarified Water with piping, instruments, valves

etc. xvi. Two (2) (1W + 1S) Air Blowers for PT-CW Pressure Sand Filters with piping, valves, instrumentation

etc. xvii. One (1) no. RCC Filter Backwash Pit (in twin section) for PT-CW Pressure Sand Filters with common

sump interconnected through valves. xviii. Two (2) (1W + 1S) nos. Filter Backwash Pumps (for PT-CW Pressure Sand Filters Backwash) with

piping, valves, fittings and instrumentation up to Stilling Chambers of Clarifiers. xix. Two (2) (1W + 1S) Air Blowers with piping, valves, instrumentation etc. common for Sludge Pit/

Backwash Pit with its internals (i.e.) casing, impeller, shaft etc. FRP lined to protect against corrosion will be provided by bidder in clarifier sludge sump. Blower speed shall be limited to 1500 rpm. Noise level of blowers should be limited to 85 dBA at 1 m from blowers. All the air blower shown in the P&IDs & referred in the technical specification shall be provided in the acoustic enclosures.

xx. Two (2) nos. Alum Solution Preparation Tanks with motorised stirrer, flushing arrangement, instrumentation, valves, fittings and piping up to the PT-CW Clarifiers and Lamella Clarifier/ Tube Settler of LET system.

xxi. Five (5) nos. Alum Dosing Pumps [3 nos. (2W + 1S) for PT- CW Clarifiers & 2 nos. (1W + 1S) for Lamella Clarifier/ Tube Settler of LET system] with Piping, valves & instrumentation etc.

NP-10

123
Highlight
123
Highlight
123
Highlight
123
Highlight
123
Highlight
123
Highlight
123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 3 OF 71

xxii. Two (2) nos. PAC Solution Preparation Tanks with motorised stirrer, flushing arrangement, instrumentation, valves, fittings and piping up to the Clarifiers.

xxiii. Five (2) nos. PAC Dosing Pumps [3 nos. (2W + 1S) for PT CW-clarifiers & 2 nos. (1W + 1S) for Lamella Clarifier/ Tube Settler of LET system] with Piping, valves & instrumentation etc.

xxiv. Two (2) nos. FeCl3 Solution Preparation Tanks with motorised stirrer, flushing arrangement, instrumentation, valves, fittings and piping up to the Clarifiers.

xxv. Two (2) nos. FeCl3 Dosing Pumps [for PT-DM Clarifier] with Piping, valves & instrumentation etc. xxvi. One (1) no. Filtered Water Overhead Storage Tank with float type valve, overflow & drain

arrangement, valves, instrumentation etc. xxvii. One (1) no. Clarified Water Overhead Storage Tank with float type valve, overflow & drain

arrangement, valves, instrumentation etc. xxviii. Two (2) nos. Weighing Scales, two (2) nos. electrically operated monorail hoist in chemical house, etc. xxix. Two (2) nos. waste service water transfer pumps with piping (up to lamella clarifier of LET system),

valves, instrumentation etc. as indicated in P&ID of LET System and instruments installed in the sump along with oil removal facility.

xxx. One (1) no. Lamella clarifier/ tube settler with one flash mixer and flocculation chamber at its upstream, stirrer, piping, valves etc. as indicated in P&ID of LET System.

xxxi. One no. Central Monitoring Basin (CMB) in twin section with piping, valves/ gates, instrumentation etc. as indicated in P&ID of LET System.

xxxii. Two (2) nos. Treated effluent disposal pumps with piping, valves, instrumentation etc. as indicated in P&ID of LET System.

xxxiii. Two (2) nos. (1W+1S) flushing pumps shall be provided by the bidder for flushing chemical and sludge lines.

xxxiv. Bidder to provide the toilet blocks (Gents, Ladies) in Chemical house of Pre-treatment plant and Waste Service Water System/ LET system control room.

xxxv. All piping, valves, instruments as required for the system completion. xxxvi. All other things are also included in scope of supply as specified in other part of the specification

including under design criteria and technical details. xxxvii. Coating, rapping and protection of buried pipes will be in bidder’s scope. xxxviii. All pipes, fittings etc. required for handrailing, platforms, and ladders shall be in the scope of bidder. All

insert plates, nuts and bolts, counter flanges wherever applicable shall be in the scope of bidder. xxxix. Edge angle required in a proper shape for edge protection in civil works will be provided by bidder.

xl. All sluice gates shall be in the scope of bidder only. xli. Complete civil work of pedestals/ buried piping shall be in bidder’s scope. All auxiliary steel structures

(U-clamps, nuts, bolts, channels etc.) for fixing the pipe on the pedestal or trestles shall be in the scope of bidder.

xlii. Bidder to note that surface flow rate of cascade aerator shall be 0.03 m2/m3/hr. xliii. Bidder to note that clarifiers shall be provided with full bridge. xliv. All motorized valves shall be provided with integral starter. xlv. For calculation of pump head, bidder to follow the technical specification requirement. The exact static

head shall be finalized during detail engineering, and it can be 12 m for trestle routed. xlvi. The top water level in the clarified water distribution chamber shall be 3.5 meter from finished ground

level. However the exact level shall be decided during detail engineering. xlvii. Bidder to note that continuous chlorine will be dosed by chlorination plant vendor in stilling chamber

(Chlorine solution strength shall not be more than 2500 ppm). Bidder to take care while selection of MOC due to effect of chlorine.

xlviii. All the first fill and one Year's topping requirements or 15 % of first fill quantity, whichever is more, of consumable such as greases, oil, lubricants, servo fluids/ control fluids, which will be required to put the equipment covered under the scope of specifications, into successful commissioning/ initial operation and to establish completion of facilities shall be furnished by the Contractor. Suitable standard lubricants as available in India are desired. Efforts should be made to limit the variety of lubricants to minimum.

NP-11

123
Highlight
123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 4 OF 71

xlix. Chemicals and Reagents to carry out Pre-commissioning, Commissioning, Trial Run, and Performance Demonstration test.

l. Wherever terminal points between NBPPL and bidder indicated, bidder shall provide pipes with counter flange.

li. Wherever local instruments for measurement of Flow, Pressure, Level is indicated in the P&ID, Bidder to provide Diaphragm seal type instrument for Chemical (all type and concentration), corrosive, viscous fluids application.

lii. One set of all special tools & tackles of reputed make necessary for proper maintenance or adjustment of the equipments being supplied by the bidder, packed in permanent box.

1.1.1 DESIGN CRITERIA AND TECHNICAL DETAILS

1. The PT-CW Clarification Plant shall have 2 x 100% capacity Clarifiers. Design net output capacity of each PT-CW Clarifier shall be 1550 m3/ hr. Pl. refer Technical Datasheet (Section:- C1, Sub-section:- III). The Raw water analysis to be adopted for Design of Pre-treatment Plant shall be as indicated in the specification.

2. The PT-DM Clarification Plant shall have 1 x 100% capacity Clarifiers. Design net output capacity of PT-DM Clarifier shall be 110 m3/ hr. PT-DM Clarifier’s Technical requirements and associated equipments shall be in line with PT-CW Clarifiers and its associated equipments. The Raw water analysis to be adopted for Design of Pre-treatment Plant shall be as indicated in the specification.

3. The proposed schematic arrangement of the Pre-treatment Plant is detailed out in tender drawing titled P & ID for Pre-treatment plant.

4. Stilling chamber, Clarifiers, Chemical storage/ preparation tanks in Chemical house shall all be of RCC construction unless otherwise mentioned.

5. The hydraulic circuit of the complete Pre-treatment plant shall be designed in such a way that water from Aerator shall flow by gravity up to the clarified water distribution chamber, PT-CW Clarified Water Storage Tank, and PT-DM Clarified Water Storage Tank as the case may be under various flow rates up to maximum flow.

6. The effluent water from the PT-plant shall meet the guaranteed parameters specified elsewhere. 7. Plant shall be designed considering the available head at the terminal point, water level of filtered

water sump/ clarified water storage tank and the head loss between the aerator to filtered water sump/ clarified water tank.

8. Hydraulics of the Complete Pre-treatment Plant shall be designed to take an occasional over loading of 20% over the design flow.

9. Pre-treatment plant shall be designed such that any one PT-CW clarifier/ two PT-CW clarifiers can be by passed.

10. Complete Pre-treatment Plant shall design to run continuously. 11. Layout for pre-treatment plant shall be designed in such a way that all units (e.g.- aerator, stilling

chamber, clarifier, inlet channel, chemical house first floor, gravity filter operating floor etc.) shall be interconnected by at least 1 M wide walkway at appropriate elevations with hand-railing on both sides and pathway at ground level.

12. Capacity of monorail hoists/ E.O.T crane or chain pulley block wherever indicated in Datasheet– A are minimum and capacity of such hoists/ cranes etc. shall be suitable for handling 125% of maximum weight to be handled during erection and maintenance of the equipments in the pump house, buildings etc. as the case may be.

13. Operating platforms shall be provided for all the structures such as aerator, stilling chamber, clarifier, sludge chamber etc. along with ladders and hand railing.

14. Potable Water Pumps (in NBPPL scope) and Filtered Water Transfer Pumps will be installed in PT- CW Clarified Water Pump House and PT-DM Clarified Water Pump House respectively. Details of Potable Water Pumps will be provided by NBPPL during detailed engineering.

15. All the sumps, tanks, reservoirs and other water retaining structures shall be provided with access ladders/ rungs from operating platforms/ ground level as the case may be and de-watering pits one for

NP-12

123
Highlight
123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 5 OF 71

each section. Handrailing will be provided by bidder for safety purpose in all civil structures. Supply and erection of Hand railing as desired for safety purpose will be in bidder’s scope.

16. All the tanks shall be provided with vent, overflow, drain and sample connections. Effective capacity for chemical tanks & water retaining structures/ tanks/ sumps means the capacity between the bottoms of the overflow nozzle to the top of the outlet nozzle. Outlet nozzle centre line shall be kept at least 200 mm from the Invert Level of the chemical tanks/ water retaining structures/ tanks/ sumps. A minimum free board of 300 mm shall be provided in all the water retaining structures of PT Plant (such as Aerator, Stilling chamber, all the channels, Clarifiers, Clarified water tank, Overhead filtered water tank, Sludge sump, Backwash water collection sump, Chemical tanks etc.) above the maximum water level/ overflow level as the case may be excluding the thickness of the slab / beam thickness if any.

17. Maximum operating speed of all the pumps shall be limited to 1500 RPM or less unless specified otherwise.

18. For all pumps, while calculating the pump head, 10% margin shall be considered on frictional losses. 19. Max. support length in meters for MS pipe shall be as follows:-

a) PIPE DIAMETER (MM) 1200 1000 800 b) SPAN (METERS) 12 10 10

For pipe sizes less than 800 NB, span shall be as per ANSI B31.1. 1.1.2 OTHER DESIGN AND CONSTRUCTION FEATURES

1.1.2.1 AERATOR

The aerator shall be of stepped design and shall allow water to flow downward after spreading over inclined thin sheets and the turbulence is secured by allowing the water to pass through a series of steps and baffles. Exposure time shall be suitably designed by providing adequate number of steps in the aerator. Water from aerator launder shall be led into the Stilling Chamber.

1.1.2.2 STILLING CHAMBER

The stilling chamber shall be provided with a baffle wall so that water shall enter the chamber from the bottom and velocity of water rise through the stilling chamber shall be selected to avoid any turbulence of the incoming water and volume of stilling chamber shall have a retention time of 1 minute. Draining arrangement with a valve shall be provided for the stilling chamber.

1.1.2.3 CLARIFIERS

The type of clarifier shall be solid contact reactor type with integral variable speed impeller/ turbine to internally re-circulate water and sludge at adjustable rate to produce consistent water quality at varying hydraulic load and turbidity. These clarifiers shall be provided with following features:-

1) The unit shall be designed with a minimum retention time of 90 minutes in the settling zone. Larger retention time may be provided to meet the equipment guarantee.

2) The overall area of the unit shall be based on an average flow velocity not more than 3 m3/ m2/ hr.

3) Weir loading shall not exceed 300 m3/ m/ day. For uniform overflow over weirs, triangular notches (saw tooth weir) shall be provided as necessary.

4) Clear width of the bridge shall not be less than 1200 mm.

NP-13

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 6 OF 71

5) Design of the sludge removal system should be such as to reduce loss of water during sludge blow off within 3% of rated flow. Inlet portion of the unit, (i.e. pumps, stilling chamber, inlet channel and clarifier) shall be designed to handle excess water to make good for water loss during sludge blow-off.

6) The clarifier periphery (all around) shall have sufficient width (minimum 850 mm) to have an easy walkway for general inspection. This walkway shall be provided with handrail along with periphery access ladders (at least from two locations) with platforms and hand railing for the clarifier for good approach. Permanent ladders shall also be provided (not rungs) for approaching the sludge pipeline valves for maintenance. (However the sludge valves shall be operatable from the top of the sludge chamber through head stock and extended spindle arrangement.

7) The sludge blanket shall be suspended and maintained in the lower portion. 8) The clarifier unit shall be circular, central feed type with concentric recirculation zone (rapid

mixing) with sampling points at different elevation, reaction zone (slow mixing) and clarification zone in RCC construction.

9) Bridge type rake arm and suitable equipment such as turbine/ impeller shall be provided for internal sludge recirculation.

10) The design of the turbine/ impeller shall be such as not to break the flocks during recirculation. 11) Suitable mechanism for varying the recirculation rate shall also be provided such that the

reactor clarifier shall be capable of operating at varying hydraulic load and turbidity with consistent effluent quality.

12) Clarifiers shall be provided with radial launders. 13) The bottom of clarifier shall be sloped towards the center and mechanically driven sludge

scraper and collector shall be used to remove the settled sludge down the sloping bottom to the central sludge area. Rubber squeezer pads shall be provided on sludge scraper and skimmer. Sludge removal system design shall consist of central sludge area with rotating pickets and back flush arrangement for proper control of sludge accumulation at the bottom.

14) Suitable scum collecting arrangement shall be provided in the clarifying section for removal of floating debris, foam etc. if possible. The scrapper shall consist of blades (Mild steel with rubber inserts with bitumastic paint protective coating) which are inclined to the radius in the opposite direction to that of the floor scrapper.

15) The rake bridge and agitators shall be constructed of structural steel and suitably braced to provide rigidity.

16) Sludge blow off shall be effected by the static head of water in the clarifier unit. Sludge outlet pipes from the concentrated sludge hopper shall be branched into main disposal line and continuous sludge disposal line. Main sludge disposal line, which includes a blow-off valve, shall drain sludge to the sludge disposal pump sump. This is an intermittent operation. Continuous sludge disposal line consists of telescopic stand pipe, the top of which is maintained at a desired elevation to ensure trickle flow of water or sludge water mixture to the sludge sump. The de-sludging of clarifiers shall be done twice in a shift. The de-sludging of one (1) Clarifiers shall not exceed one (1) hour. All equipments/ sumps shall be designed accordingly.

17) Arrangement of clarifier sludge pit/ sump shall be as indicated in data sheet and schematic drawings. Minimum capacity of each section of the pit shall be referred in the data sheets. Bidder shall supply all necessary piping, valves and other accessories as required. Each section of the pit shall be provided with agitation by recirculation (jetting nozzles) systems and air agitation system.

18) Suitable sampling connections from the various levels and zones of clarifier and at the outlet shall be provided for performance monitoring.

19) Generally each of the clarifier shall be provided with a gate at the outlet for isolation of any of the clarifier for maintenance.

NP-14

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 7 OF 71

1.1.2.4 OVERHEAD WATER STORAGE TANK The Filtered Water Overhead Tank and Clarified Water Overhead Tank shall have approach from chemical house through permanent staircases (RCC) and door. The water level in the tank shall be maintained by means of a float operated valve. The tank shall be provided with an overflow and drain connection with valve.

1.1.2.5 CHEMICAL HOUSE

i) Dosing Preparation Tanks:- a) Alum Preparation Tanks: Two (2) numbers of tanks of RCC construction shall be provided. Each

tank shall be sized for holding alum solution (of about 10% W/ V concentration) for 12 hours requirement of all the PT-CW Clarifiers & Lamella clarifier/ Tube settler of LET system at its design capacity. Tanks shall be provided for dissolving alum basket motorised stirrer, level indicator/ transmitter, dissolving basket etc.

b) PAC Solution Preparation Tanks.: Two (2) numbers of tanks of RCC construction shall be provided. Each tank shall be sized for 12 hrs. requirement of all the PT-CW Clarifiers and Lamella Clarifier/ Tube Settler of LET System at design capacity. Tank shall be provided with motorised stirrer, level indicator/ transmitter, dissolving basket etc.

c) FeCl3 Solution Preparation Tanks.: Two (2) numbers of vertical, atmospheric covered tanks of MSRL/ FRP construction shall be provided. Each tank shall be sized for 12 hrs. requirement of PT-DM Clarifier at design capacity. Tank shall be provided with motorised stirrer (MOC: SS 316 L/ MS with FRP lining), level indicator/ transmitter, dissolving basket etc.

ii) Dosing/ Transfer Pumps:- a) Alum dosing Pumps: Three (3) (2 W + 1S) pumps for PT-CW clarifiers and Two (2) (1W + 1S)

pumps for Lamella Clarifier/ Tube Settler, of simplex hydraulically operated diaphragm type suitable for dosing alum at design dosage rate specified (suitable for alum solution of 10% W/ V strength) and head as required. Capacity of alum dosing pumps shall be rounded to next higher 50 litre/ hr. increment. Material of construction of Liquid end (pump head, valve, valve housing etc.), valve spring shall be SS-316. Material of construction of Diaphragm, Packing shall be of PTFE. Shaft shall be Hardened Steel (EN8-BS-970)/ AISI-316. Pumps shall be provided with accessories such as Y-type suction strainers, pressure dampeners, safety relief valves etc.

b) PAC solution Dosing Pumps: Five (5) numbers [3 nos. (2W+1S) for PT-CW clarifiers & 2 nos. (1W+1S) for Tube Settler/ Lamella Clarifier of LET system] simplex hydraulically operated diaphragm type pumps suitable for PAC solution dosing at design dosage rate specified & liquid handled. Material of construction of Liquid end (pump head, valve, valve housing etc.), valve spring shall be SS-316. Material of construction of Diaphragm, Packing shall be of PTFE. Shaft shall be Hardened Steel (EN8-BS-970)/ AISI-316. Pumps shall be provided with accessories such as Y-type suction strainers, pressure dampeners, safety relief valves etc.

NP-15

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 8 OF 71

c) FeCl3 dosing Pumps: Two (2) (1W + 1S) pumps for PT-DM clarifier, of simplex hydraulically operated diaphragm type suitable for dosing FeCl3 at minimum dosage rate of 15 ppm (suitable for FeCl3 solution of 10% concentration) and head as required. Material of construction of Liquid end (pump head, valve, valve housing etc.) shall be PP/ FRP/ CPVC/ Rubber Lined Steel. Material of construction of Diaphragm shall be of Teflon. Pumps shall be provided with accessories such as Y-type suction strainers, pressure dampeners, safety relief valves etc.

iii) Chemical house storage area, tanks, dosing pumps etc. equipments of PT Plant shall be sized for the

following minimum dosing requirements. Chemical storage room at ground floor of Chemical house shall be designed to store these chemicals (for PAC, ALUM, & FeCl3) for minimum 15 days period:

Alum: 40 ppm on 100% basis PAC : 10 ppm on 100% basis

iv) The storage area shall have suitable bins/ partitions sufficiently large enough to accommodate storage requirement of PAC, Alum, & FeCl3. The chemical house shall have sufficient unloading space, wide corridors for movement of chemicals etc.

v) In the first floor of chemical house, all chemical preparation tanks such as alum preparation tanks, PAC preparation tanks, FeCl3 solution preparation tanks and respective dosing pumps shall be located. Suitable space for maintenance of pumps, valves etc shall be provided to have clear access to different units.

vi) Alum solution shall be dosed by simplex hydraulically operated diaphragm type pumps with facility for adjusting manually the dosages rate of alum solution by micrometer dial.

vii) The chemical house shall be equipped with two weighing scales of platform & dial type suitable for chemicals being handled. Range of weighing scale shall be suitable for weighing 0-500 Kg and 0-2000 Kg. Technical requirements of weighing scale shall be as specified in Datasheet – A.

viii) Suitable pressurized water connections shall be provided in alum piping network for flushing purpose. Flushing connections should be provided at regular interval.

ix) Two numbers of electrically operated monorail hoist to be provided in chemical house and capacity of the same shall be minimum 1 T. Capacity of the monorail hoist/ E.O.T crane or chain pulley block wherever indicated in the data sheets are minimum and the capacity of such crane/ hoists shall be suitable for handling 125% of the maximum weight to be handled during erection and maintenance of the equipments in the pump house, building etc. as the case may be.

x) Slow speed agitators with reduction gear units for each alum solution preparation tank, PAC solution preparation tanks, and FeCl3 solution preparation tanks shall be provided. The material of construction of shaft & impeller of agitator shall be of Stainless Steel 316 Grade for Alum & PAC and SS316L for FeCl3 application.

xi) Each of the chemical tanks (Alum and PAC) shall be provided with dissolving chamber of SS-316 grade. Overflow sampling and drain connections etc. shall be provided for all the tanks.

xii) Water required for preparation of chemical solution shall be taken from the overhead water tank located on top of chemical house.

xiii) Overflow & Drain Disposal System o Overflow & drains from the various chemical tanks and floor wash drains of chemical house

building (except overflow from O/H water storage tanks) shall be led to the PT Plant Clarifier sludge sump.

o Overflow flow & drains from structures and piping handling clear raw water, clarified water and filtered water in PT Plant such as aerator, stilling chamber, inlet chamber shall be led up to the filter backwash sump.

o Overflow from treated water tanks, service water tanks shall be led to nearest plant drain.

NP-16

123
Highlight
123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 9 OF 71

o Concrete sewerage pipe/ Hume pipe shall not be used for any of the drain disposal system. Ductile/ Cast Iron pipes or Carbon steel (mild steel pipes) pipes may be used for drain disposal system.

xiv) Weighing Scales a) The weighing scale shall be of platform type, consisting of compound levers, food receptacle in the

form of a platform and coupled to a direct reading, dial type indicator and BSI standard/approved. a) Suitable balancing arrangement shall be provided to take into account daily wear and tear. b) The platform will be provided with a locking arrangement which will permit placement of the load

continuously on it without its weight being transferred to the levers and measuring system. The lock will be released only during taking a reading on the machine.

c) The platform shall be capable of accepting concentrated loading. d) The weighing scale shall be suitable for weighing miscellaneous chemicals like alum, lime, soda

ash, soda flake, Coagulant aid etc. e) All graduations in weighing instruments shall consist of notches or uniform lines, sharply defined

which may be painted, incised or embossed so that the position of all pointers or sliding poles is easily readable. All number graduations and their subdivision shall be marked by line longer than the minor graduation and the minimum distance between any two considered graduations shall be 1.5 mm. The knife edges shall be of agate or of suitable quality steel. The bearings shall be of suitable quality steel.

f) Knife edges and bearings shall be accurately and firmly secured preferably by shanks and nuts or by bolts and nuts or by set screws. The knife edges and bearings shall be protected against corrosion and dirt. Racks and pinions shall be suitable hard wearing materials and shall be finished smooth.

g) Least account of the dial limits of sensitiveness and greatest error for platform weighing scales shall be as follows:-

Capacity Least count

Sensitiveness when fully loaded

Greatest error allowed in excess or deficiency when fully loaded

Greatest error allowed in excess or deficiency when quarter of full load is loaded

100 kg 200 gm 10 gm

A weight corresponding to one half of the internal minimum graduation.

Within half the limits of error prescribed for full load.

300 kg 500 gm 60 gm 500 kg 1 kg 100 gm 1000 kg 2kg 125 gm 2000 kg 2kg 250 gm 3000 kg 2kg 300 gm

h) Marking sealing and testing shall be line with IS: 1432. The manufacturer shall conduct all test required to ensure equipments conform to the requirements of the applicable Codes/standards. All material test certificates shall be made available to the owner.

i) Certificate of verification from Indian controller of weights and measures shall be furnished along with weighing scale.

xv) Metering Pumps a) Pumps shall be simplex displacement hydraulically operated diaphragm design, driven by squirrel

cage induction motor through suitable speed reduction unit. Maximum pump stroke speed shall not exceed 100 per minute.

b) The stroke shall be continuously adjustable to give a capacity variation 10-100% range while the pumps are running or stopped. Adjustment of capacity shall be done by automatically from remote location and / or manually (micrometric adjusting type) locally for each of the pump as described elsewhere.

NP-17

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 10 OF 71

c) Capacity variation may be effected by changing eccentricity of the driving crank or by suitable hydraulic circuit. Pump accuracy shall be industry standard + 1% of capacity setting.

d) Pumps shall be provided with an integral relief valve, spring operated, to release pressure when delivery line blockage occurs.

e) Crank case shall be constructed of high quality cast iron which will also house the gear box and guides for cross head.

f) Guided, controlled travel, double-ball check valves or equivalent, shall be provided both on the suction and discharge sides. Suitable gland seal be provided to prevent leakage.

1.1.2.6 WASTE SERVICE WATER TREATMENT SYSTEM The complete treatment plant shall be designed to handle the rated flow. Hydraulics of the plant shall

such as to take an occasional overloading of 20% of the design flow rate.

Design conditions for tube settlers/ lamella clarifiers:- Inlet quality Outlet quality

i) Turbidity 500 ppm (max.) 10 ppm (max.) ii) Oil content 50 ppm (max.) 5 ppm (max.)

A. Waste water collection sump & pumping scheme [CIVIL Design & CIVIL Work excluded

from Bidder’s scope]: The waste water shall be collected in an underground RCC sump. For this purpose, NBPPL shall construct the connecting channel from the existing drains up to the pit. Recirculation system for proper mixing of effluent with the help of motor operated valves at pumps discharge and in recirculation line shall be provided by bidder. Oil removal facility shall be provided along with oil skimmer, oil drum etc. as specified elsewhere.

B. Tube Settlers/ Lamella Clarifiers: a) Tube settler/ Lamella clarifier shall be capable of handling the specified design flow rate

(mentioned in Data Sheet) and producing effluent water quality as indicated. b) Each tube settler/ Lamella Clarifier shall be provided with one flash mixer and Flocculation

Chamber at its upstream. Chemical shall be added to the wastewater in the flash mixer. Flash mixer shall be of R.C.C. construction. Flash mixer shall be circular/rectangular type. Water from the flash mixer shall flow to adjacent flocculation chamber by gravity. Suitable mechanical stirrer, .driven by electric motor through speed reducing gearbox, shall be provided in each flash mixer to ensure adequate mixing of chemicals with the Effluent waste water. Stirrer blades shall be mounted on vertical shaft. Vertical baffles projecting 1/10 to 1/12 tank diameter, at least, 4 places along the walls of the tank shall be provided to reduce rotational movement of vortex formation around the shaft of the stirrer and prevent short-circuiting. Flash mixer shall provide minimum one-minute storage at the design flow rate of the flash mixer.

c) Water from flash mixer shall flow to a flocculation chamber by gravity. Adequate retention time shall be provided for the incoming water to allow formation of uniform flocs. The flocculation chamber shall be of circular/rectangular type with suitable mechanical agitator driven by electric motor through speed reducing gearbox. Water from the bottom of flocculation chamber shall flow to the Tube Settler / Lamella Clarifier by gravity. The . . flocculation chamber shall provide minimum 10 minute storage at the design flow rate of the Tube Settler / Lamella Clarifier. Designs with flocculation chamber and separator integral in the same unit are also acceptable.

d) Tube settler/ Lamella Clarifiers shall be of RCC and of proven design. These shall be provided with walkway (bridge) and platform to approach all the internals. Clear width of the bridge shall not be less than 1200 mm.

NP-18

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 11 OF 71

e) All metallic parts inside the tube settler/ Lamella Clarifiers coming in contact with water shall be painted with three (3) coats of epoxy paint over one (1) coat of primer to prevent corrosion Total thickness 300 micron. Other components shall be painted with one coat of red lead primer and three coats of suitable rust preventing paint Total thickness 200 micron. The concrete parts coming in contact with water shall be painted with three (3) coats of Bitumastic heavy-duty paint of 400 microns thick.

f) Design of the sludge removal system should be such as to reduce loss of water during sludge blow off within 5% of rated flow.

g) The tube settler/ Lamella Clarifiers periphery shall have sufficient width to have an easy walkway along-with hand-railing for general inspection. Access ladders (at least from two locations) with platforms and hand-railing shall be provided in the separator for good approach. However, the manual sludge valves shall be operable from the top of the sludge chamber through head stock and extended spindle arrangement.

h) Suitable sampling connections shall be provided for performance monitoring. i) The tube settler/ Lamella Clarifiers shall be circular/rectangular with distinct tube / plate

separation zones, sludge thickener zone, clear water zone and oil skimming zone. The tube settler/ Lamella Clarifiers shall be counter flow or cross flow type. Co-flow type units are not acceptable.

j) The unit shall be designed with minimum side water depth of 4 M. The overall area of unit shall be based on an average flow velocity not more than 5 m3/ hr./ m2.

k) The inclined tubes/plates shall be spaced so that stable flow conditions are available. The flow through the tube/plates shall be viscous/laminar. The cross sectional area of each tube shall be such that the effective hydraulic diameter is 80 mm (min). The material of tube pack shall be UV inhibited virgin PVC.

l) In case of plate type separator the distance between the successive plates shall be 50 mm (min). The plates shall be made of GRP (glass reinforced plastic). The resin for the manufacturing of GRP plates shall be orthophthallic type.

m) The length of the tubes/plates through which the water flow shall not be less than 1.5 M. n) The tubes/plates shall be inclined by 50-80 deg. angle to the horizontal. The tubes/plates shall

be arranged such that the complete water travels through all the tubes across the cross section of separator.

o) To remove settled particles from the plates/tubes suitable water jet arrangement shall be provided. Pumping and piping arrangement shall be separately provided for this purpose. The tube/ plates shall be easily accessible for the cleaning purpose. The. tube pack / plates shall be placed inside the separator such that these may be individually removed for maintenance even when separator is operating.

p) The entire pack shall be rigid and 'shall not deflect by self-weight, water load or operator movement over the pack. Special features of pack/ plate support arrangement and maintenance shall be brought out in the bid.

q) Treated water shall be collected in a trough provided with adjustable weir. r) The unit shall be capable of delivering constant effluent water quality without any sludge/oil

carryover, even at the time of rapid increase in influent water flow or change in influent water quality, or changes in raw water temperature.

s) The bidder shall justify the design basis of entire plate/tube type separator unit and individual components of the entire unit with backup calculations and also by means of supplying documentary evidence from their earlier installed plants in the form of drawings, certificates, etc.

t) The tube settler/ Lamella Clarifiers shall employ positive removal system of consistent density, central sludge concentrating sump, water flushing nozzles etc. as per the standard design of manufacturer. Sludge removal system shall be designed to thicken the sludge to minimum 2% consistency before disposing from separator bottom. All the pipelines carrying the sludge shall be provided with flushing connection. The pumps and piping if required for flushing purpose

NP-19

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 12 OF 71

shall also be separately provided. Angle of inclination of sludge hopper shall be minimum 55° to horizontal plane for effective collection of sludge.

u) Sludge blow-off shall be effected by the static head of water in the Tube settler/Lamella Clarifiers. Sludge outlet pipe from the concentrated sludge hopper shall be branched into main disposal line. Main sludge disposal line should consist of blow-off valve which would be operated manually and drain sludge to the sludge disposal sump. This would be an intermittent operation. Continuous sludge disposal line shall consist of a telescopic stand pipe, the top of which would be maintained at a desired elevation to ensure trickle flow of water of sludge water mixture to the sludge sump.

C. Central monitoring basin: a) Number of tanks/ sumps, minimum capacity of each section of CMB shall be referred in data

sheets and P&ID for LET system.

1.1.3 PAINTING

a) All the equipments such as pumps, piping etc of this system shall be protected against external corrosion by providing suitable painting as mentioned below.

b) All the metallic parts of equipments of Complete Pre-treatment plant & LET System which are embedded in concrete or in contact with water shall be painted with three coats of Bitumastic heavy duty paint over a coat of primer to prevent corrosion unless otherwise specified and total thickness shall be 400 microns. All other parts of the PT plant shall be painted with one coat of primer and three coats of chlorination rubber paint and total thickness shall be 200 microns.

c) Buried portion of raw water feed pipe from Inlet channel to clarifiers shall be encased with concrete and externally painted with epoxy for the portion inside the clarifiers.

d) Painting of vessels, tanks & piping shall be as specified elsewhere. e) The surfaces of stainless steel, Galvanised steel, Gunmetal, Brass, Bronze and non-metallic

components shall not be applied with any painting. f) The steel surface to be applied with painting shall be thoroughly cleaned before applying painting

by brushing, shot blasting etc. as per the agreed procedure. g) External Painting of surfaces of other equipments of PT System (such as pumps, valves etc)

exposed to (outdoor installation) atmosphere, a coat of chlorinated rubber based zinc phosphate primer of minimum thickness DFT of 50 microns followed up with undercoat of chlorinated rubber paint of minimum DFT of 50 microns shall be applied. Then, intermediate coat consisting of one coat of chlorinated rubber based paint pigmented with Titanium di-oxide with minimum DFT of 50 microns and topcoat consisting of two coats of chlorinated rubber paint of approved shade and colour with glossy finish and DFT of 100 microns shall be provided. Total DFT of paint system shall not be less than 200 microns. For the steel surfaces inside the (indoor installation) building, a coat of read oxide primer of minimum thickness of 50 microns followed up with undercoat of synthetic enamel paint of minimum thickness of 50 microns shall be applied. The top coat shall consist of two coats each of minimum thickness of 50 microns of synthetic enamel paint and thus total thickness shall be minimum 200 microns.

NP-20

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 13 OF 71

1.2 RO-DM PLANT:-

(REFER ENCLOSED P & ID FOR RO-DM PLANT) Complete Reverse Osmosis with mixed bed combination Plant (skid mounted) including complete Ultrafiltration system/skid, UF permeate-cum-back wash water storage tank, UF recirculation fast flush tank with UF fast flush pumps, micron cartridge filters, RO High pressure feed pumps, completely skid mounted RO block, Degasser tower and Degassed water storage tanks, Degassed water pumps, RO chemical (dosing system, RO Chemical cleaning skid, Mixed bed exchangers along with regeneration system including acid/ alkali unloading, storage & dosing system, waste neutralising and disposal system, DM water Regeneration pumps, MB blowers, degassed blowers, interconnecting piping, fittings, valves, etc., first fill of filter media/ resin for all units, 25 NB Stainless steel DM water line from MB header to all the laboratory rooms with isolation valves.

Bidder to note that RO-DM Plant shall be a complete system which shall include associated Mechanical, Electrical, Control & Instrumentation work. All the work i.e. Mechanical work, C&I, Electrical works (refer Electrical, C&I for respective scope), All CIVIL work including building & foundation of equipments shall be excluded from the scope of bidder. Broad scope of supply has been listed below:-

i. Two nos. (2 x 100%) filtered water transfer pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

ii. Two (2 x 100%) PT-DM Pressure Sand Filters along with piping, valves, fittings, instrumentation and associated accessories.

iii. 2 x 50% Ultrafiltration System (Skid based) along with piping, valves, fittings, instrumentation and associated accessories.

iv. 3 x 50% UF Backwash Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

v. Two (2X100%) nos. of UF Air Blowers along with piping, valves, fittings, instrumentation and associated accessories.

vi. 2 x 100% simplex strainers at Inlet to each UF skid along with necessary piping, valves, fittings, instrumentation and associated accessories.

vii. One (1) no. UF Chemical Cleaning System consisting of 1 no. (1 x 100%) UF Chemical Cleaning Tank and 2 nos. (2 x 100%) UF Chemical Cleaning Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

viii. One (1) no. Acid Dosing System (for dosing Acid in UF backwash line to UF System) consisting of 1 no. (1 x 100%) Acid Measuring Tank and 2 nos. (2 x 100%) Acid Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

ix. One (1) no. Alkali Dosing System (for dosing Alkali in UF backwash line to UF System) consisting of 1 no. (1 x 100%) Alkali Measuring Tank and 2 nos. (2 x 100%) Alkali Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

x. One (1) no. Hypo Dosing System (for dosing Hypo in UF backwash line to UF System) consisting of 1 no. (1 x 100%) Hypo Measuring Tank and 2 nos. (2 x 100%) Hypo Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xi. One (1) (1 x 100%) basket strainer in UF Backwash Inlet Line along with necessary piping, valves, fittings, instrumentation and associated accessories.

xii. One (1) no. Silt Density Index at the inlet to UF permeate water storage tank. xiii. One (1) no. (1 x 100%) UF Permeate Water Storage Tank along with piping, valves, fittings,

instrumentation and associated accessories. xiv. 3 x 50% UF Permeate Transfer Pumps along with motor, piping, valves, fittings, instrumentation and

associated accessories.

NP-21

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 14 OF 71

xv. 3 x 50% Micron Cartridge Filters (for RO Module Stage-1) along with piping, valves, fittings, instrumentation and associated accessories.

xvi. One (1) no. Acid Dosing System (for dosing Acid before Micron Cartridge Filter) consisting of 1 no. (1 x 100%) Acid Measuring Tank and 2 nos. (2 x 100%) Acid Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xvii. One (1) no. Scale Inhibitor Dosing System (for dosing Scale Inhibitor before Micron Cartridge Filter) consisting of 1 no. (1 x 100%) Scale Inhibitor Measuring Tank and 2 nos. (2 x 100%) Scale Inhibitor Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xviii. One (1) no. SMBS Dosing System (for dosing SMBS before Micron Cartridge Filter) consisting of 1 no. (1 x 100%) SMBS Measuring Tank and 2 nos. (2 x 100%) SMBS Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xix. 1 no. pH, 1 no. Conductivity and 1 no. Oxidation reduction potential analyzer along with their mounting accessories.

xx. Thee (3) nos. (3 x 50%) High Pressure RO-Feed Pumps for RO Module Stage-1 along with motor, piping, valves, fittings, instrumentation and associated accessories.

xxi. 2 x 50% RO Module for Stage-1 along with piping, valves, fittings, instrumentation and associated accessories.

xxii. One (1) no. Control valve at Inlet to each RO Module Stage-1 and one (1) no. Control valve in each RO-Module Stage-1 Reject line.

xxiii. 3 x 50% Degassed Water Storage Tanks along with piping, valves, fittings, instrumentation and associated accessories.

xxiv. Total three (3) nos. Degassed Towers (one for each Degassed Water Storage Tank) along with piping, valves, fittings, instrumentation and associated accessories.

xxv. Four (4) nos. of Degassed Blower (one per tower and one common standby) along with piping, valves, fittings, instrumentation and associated accessories.

xxvi. Four (4) nos. of Degassed Water Transfer Pumps (one per tank and one common standby)along with piping, valves, fittings, instrumentation and associated accessories.

xxvii. 3 x 50% Micron Cartridge Filters (for RO Module Stage-2) along with piping, valves, fittings, instrumentation and associated accessories.

xxviii. Thee (3) nos. (3 x 50%) High Pressure RO-Feed Pumps for RO Module Stage-2 along with motor, piping, valves, fittings, instrumentation and associated accessories.

xxix. 2 x 50% RO Module for Stage-2 along with piping, valves, fittings, instrumentation and associated accessories.

xxx. One no. pH analyzer at common discharge header of RO Stage-II. xxxi. One (1) no. (1 x 100%) RO Stage -2 Permeate Water Storage Tank along with piping, valves, fittings,

instrumentation and associated accessories. xxxii. Three (3 x 50%) RO Permeate Transfer Pumps along with motor, piping, valves, fittings,

instrumentation and associated accessories. xxxiii. Three (3 x 50%) nos. Mixed bed exchangers along with inlet distribution, under drain collecting

systems and regenerant inlet distribution system/ middle collector, Automatic block and bleed valves at the regenerant inlet line, piping, valves, fittings, instrumentation and associated accessories.

xxxiv. Two (2 x 100%) nos. of MB Air Blowers along with piping, valves, fittings, instrumentation and associated accessories.

xxxv. Two (2 x 100%) nos. of DM Regeneration Pumps for MB regeneration along with piping, valves, fittings, instrumentation and associated accessories.

xxxvi. One no. DM-Filtered water overhead storage tank, placed at top of DM plant building, along with piping, valves, fittings, and instrumentation etc.

xxxvii. One no hose station for transfer of hydrochloric acid (30-33% HCL) consisting of two (2) sets of hoses each of size 80 mm NB (minimum) @ 10 meters (minimum), provided along with coupling & diaphragm type isolation valves.

NP-22

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 15 OF 71

xxxviii. One no hose station for transfer of Alkali (48% NaOH) consisting of two (2) sets of hoses each of size 80 mm NB (minimum) @ 10 meters (minimum), provided along with coupling & diaphragm type isolation valves.

xxxix. Two (2 x 100%) nos. Alkali Unloading cum Transfer Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xl. Two (2 x 100%) nos. Acid Unloading Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xli. One (1) no. Bulk Acid Storage Tank complete with integral pipe works, valves, level transmitter, level gauges, fume absorber, water seal pot and all other accessories required.

xlii. One (1) no. Bulk Alkali Storage Tank complete with integral pipe works, valves, level transmitter, level gauges, CO2 absorber, water seal pot and all other accessories required.

xliii. One (1) no. Acid Measuring Tank complete with integral pipe works, valves, level transmitter, level gauges, fume absorber, water seal pot and all other accessories required.

xliv. One (1) no. Alkali Measuring Tank complete with integral pipe works, agitator, valves, level transmitter, level gauges, CO2 absorber, water seal pot and all other accessories required.

xlv. One (1) no. Alkali Preparation Tank complete with integral pipe works, agitator, valves, level transmitter, level gauges, CO2 absorber, water seal pot and all other accessories required.

xlvi. Two (2 x 100%) nos. Acid Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xlvii. Two (2 x 100%) nos. Alkali Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

xlviii. Two (2) nos. Mixing Tees (one for Acid Solution Preparation & one for Alkali Solution Preparation). xlix. One (1) number Activated carbon filter (ACF) for alkali complete with internals, integral pipe works,

valves, instruments, and all other accessories as required. l. One (1) no. Hot Water Tank with 2 x 50% electrical heating coil for heating of alkali diluent water, in a

tank of mild steel rubber lined construction complete with integral pipe works, valves, instrumentation and all other accessories required.

li. One (1) no. Neutralizing Pit (N-pit) of RCC construction (civil work not in bidder’s scope) in two compartments with acid and alkali resistant tiles. However, isolation gates along with pumps, priming tanks, piping shall be in bidder’s scope.

lii. Two (2) numbers (1W + 1S) Effluent Disposal cum Recirculation Pumps of horizontal centrifugal type with priming arrangement (two priming tanks) and final disposal to LET System-Central Monitoring Basin. Proven agitation system like air agitation, venturi mixing etc. shall be provided in addition to recirculation from pumps.

liii. One no pH Analyzer at Effluent Discharge common header. liv. One (1) no. Acid Measuring Tank for N-PIT complete with integral pipe works, valves, level gauges,

fume absorber, water seal pot and all other accessories required. lv. One (1) no. Alkali Tank for N-PIT complete with integral pipe works, agitator, valves, level gauges, CO2

absorber, water seal pot and all other accessories required. lvi. One (1) no. RO Chemical Cleaning System consisting of 1 no. (1 x 100%) RO Chemical Cleaning

Tank and 2 nos. (2 x 100%) RO Chemical Cleaning Pumps (centrifugal type) along with motor, piping, valves, fittings, instrumentation and associated accessories.

lvii. One (1 x 100%) no. Micron Cartridge Filters (for RO MEMBRANE CLEANING SYSTEM) along with piping, valves, fittings, instrumentation and associated accessories.

lviii. One (1) no. pH analyser, One (1) no. Silica analyser, & One (1) no. Conductivity analyser at the outlet of each MB unit.

lix. All piping, valves, instruments, equipments as required for the system completion. lx. All other items are also included in scope of supply as specified in other part of the specification

including under design criteria and technical details. lxi. Coating, rapping and protection of buried pipes as per IS 10221 or AWWA C 203 will be in bidder’s

scope. lxii. Start-up and commissioning spares as required.

NP-23

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 16 OF 71

lxiii. Mandatory spares as listed in technical specification. lxiv. Hangers and supports for all the piping as per the requirement shall be in bidder’s scope. lxv. Embedment plates with lugs shall also be provided by bidder as per system requirement. lxvi. All channels & brackets, mounting plates as required for mounting of motors, pumps, stirrers, tank etc. lxvii. shall be in bidder’s scope. lxviii. All pipes, fittings etc. required for hand railing, platforms, and ladders shall be in the scope of bidder.

All insert plates, nuts and bolts, counter flanges wherever applicable shall be in the scope of bidder. lxix. Edge angle required in a proper shape for edge protection in civil works will be provided by bidder. lxx. Pipe racks shall be provided by NBPPL/NTPC wherever available, wherever pipe racks are not

available, pipe shall be laid on pedestals (pedestals by NBPPL). All auxiliary steel structures (U-clamps, nuts, bolts, channels etc.) for fixing the pipe on the pedestal or trestles/ rack shall be in the scope of bidder.

lxxi. All necessary structural steel for pipe supporting structure, platforms, walkways and access stairs, mechanical plant and equipment, mechanical services and pipe work associated with RO-DM PLANT.

lxxii. All motorized valves shall be provided with integral starter. lxxiii. One set of all special tools & tackles of reputed make necessary for proper maintenance or adjustment

of the equipments being supplied by the bidder, packed in permanent box. lxxiv. Monitoring gadgets, instruments and equipments required for maintenance (till Demonstration/ PG test

and plant handover). lxxv. Instrument hook up material shall be in bidder’s scope. lxxvi. For calculation of pump head, bidder to follow the technical specification requirement. The exact static

head shall be finalized during detail engineering, and it can be 12 m (min.) for trestle routed. lxxvii. All the first fill and one Year's topping requirements or 15 % of first fill quantity, whichever is more, of

consumable such as greases, oil, lubricants, servo fluids/control fluids. lxxviii. Wherever terminal points between NBPPL and bidder indicated, bidder shall provide pipes with

counter flange. lxxix. Wherever local instruments for measurement of Flow, Pressure, Level is indicated in the P&ID, Bidder

to provide Diaphragm seal type instrument for Chemical (all type and concentration), corrosive, viscous fluids application.

lxxx. All the first fill and one Year's topping requirements or 15 % of first fill quantity, whichever is more, of consumable such as greases, oil, lubricants, servo fluids/ control fluids, which will be required to put the equipment covered under the scope of specifications, into successful commissioning/ initial operation and to establish completion of facilities shall be furnished by the Contractor. Suitable standard lubricants as available in India are desired. Efforts should be made to limit the variety of lubricants to minimum.

lxxxi. Chemicals and Reagents to carry out Pre-commissioning, Commissioning, Trial Run, and Performance Guarantee test.

lxxxii. Any item/ work either supply of equipment or erection material which have not been specifically mentioned in but are necessary to complete the woks for trouble free and efficient operation of the plant shall be deemed to be included within the scope of this specification and shall be in bidder’s scope and will be supplied by bidder without any commercial, technical and delivery implication to NBPPL.

1.2.1 DESIGN CRITERIA AND TECHNICAL DETAILS

i. DM plant consists of two streams of DM plant each of net output capacity (from each MB) 35 m3/ hr. of D.M. water of required quality. Bidder to design the complete RO-DM plant accordingly.

ii. The DM plant feed water shall be pumped from PT-DM Clarified Water Storage Tank located near PT Plant area with the help of 2 nos. (1W + 1S) filtered water transfer pumps. Inlet water quality to DM plant for the purpose of designing RO-DM plant shall be as per Annexure-I.

NP-24

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 17 OF 71

iii. The operation of UF+RO+MB based DM plant shall be semi-automatic through Water System DDCMIS (DCS based) with provision for manual operation. Necessary interlocks and instrumentation for safe operation of the plant shall be provided.

iv. The effluent water from the RO-DM plant shall meet the guaranteed parameters specified elsewhere.

v. All the tanks shall be provided with vent, overflow, drain and sample connections. Effective capacity for tanks/ sumps means the capacity between the bottoms of the overflow nozzle to the top of the outlet nozzle. Outlet nozzle centre line shall be kept at least 200 mm from the Invert Level of the tanks/ sumps. A minimum free board of 300 mm shall be provided above the maximum water level/ overflow level as the case may be.

vi. For all pumps, while calculating the pump head, 10% margin shall be considered on frictional losses.

vii. Max. support length in meters for MS pipe shall be as follows:-

a) PIPE DIAMETER (MM) 1200 1000 800 b) SPAN (METERS) 12 10 10

For pipe sizes less than 800 NB, span shall be as per ANSI B31.1. 1.2.2 OTHER DESIGN AND CONSTRUCTION FEATURES

1.2.2.1. FILTERED WATER FEED PUMPS

Two nos. (2x100 %) filtered water transfer pumps of vertical centrifugal type shall be provided for feeding the water to UF system of RO based DM plant of suitable capacity & head as per UF system requirement. These pumps will take suction from PT-DM Clarified Water Storage Tank which is a part of PT plant.

1.2.2.2. UF SYSTEM

Pressurized UF system (2 x 50%) is envisaged for further filtration and removal of suspended particles, to achieve the design SDI value of final permeate. The water from filtered water storage tank is pumped to UF system which includes ultra-filter membrane modules. Water is filtered and then stored in the UF permeate storage tank. The UF membranes are densely packed into modular components to maximize surface area. Necessary automatic backwash flushing and membrane cleaning system are envisaged (as per membrane manufacturer recommendation) for smooth trouble free operation. UF permeate transfer pumps are provided to transfer feed water to RO system via cartridge filter. UF streams shall be pressurized type. The pressure tube shall be side port type and of FRP

material. The diameter of pressure tube shall not exceed 200 mm (8.0 inch). Rated pressure of pressure tubes shall be 250 PSI or at least 10% higher than maximum pressure

encountered, whichever is higher. Isolation valves shall be provided to isolate any of the pressure tube without affecting plant

operation. Membranes shall be of hollow fiber type of PVDF or Polysulfone polymeric material. The pore size

of membranes shall not be more than 0.04 microns. Gross flux of membranes shall not exceed 50-60 ltrs. per hour per square meter (LMH).

NP-25

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 18 OF 71

Each stream shall be provided with 2 x 100% simplex strainers at inlet to membrane skid. Pressure indicators at upstream and downstream of each strainer and pressure differential switch across each strainer shall be provided.

Membrane cleaning system like chemical preparation cum dosing tanks (1 no. for each type chemical) and dosing pumps (2 x 100% dosing pumps for each type of chemical) etc. shall be provided as per standard practice of ultra-filtration system designer/ recommendation of membrane manufacturer. The preparation cum dosing tank shall be of MSRL/ FRP construction with minimum 6.0 mm thickness.

UF permeate storage tank shall store water to supply feed water to Reverse Osmosis (through micron cartridge filter) system on continuous basis and to provide water for back washing of Ultra filtration membranes. Capacity of this tank shall be calculated based on backwashing cycle and time taken for backwashing. A margin of minimum 50% of back wash water requirement shall be considered while calculating capacity of this tank.

Back washing of membranes shall be done automatically. However, CEB shall be decided by manufacturer. This back wash water shall be pumped to clarifiers of Pre-Treatment plant.

Arrangement/facilities for Direct Integrity Testing, like air pressure system, sonic leak detection etc., to detect any leak from fibres/ membranes/ cartridges/ modules, gaskets, values, fitting etc. which may contaminate the filtrate are to be provided.

1.2.2.3. CARTRIDGE FILTERS Three (3 x 50%) cartridge filters shall be provided in the upstream of each RO stage (i.e. stage I & II). Cartridge filter vessels shall have a capacity sufficient to hold the required number and size of the

cartridge elements to filter feed water. Extent of filter fouling shall be identified by measuring a differential pressure drop across the inlet &

outline line of a Cartridge filter. Cartridge vessel shall be provided with pressure relief valve, drain valve and vent valve.

The filter elements shall be cylindrical cartridges, constructed from continuously wound polypropylene fibers, which have a 5 micron nominal 90% efficient rating. The filter elements used in the membrane cleaning system shall be identical to the filter elements used to treat the RO feed water.

Cartridge shall be self-supporting with no reinforcing structures or resins. Polypropylene material shall be 100% polypropylene with no binders, resins lubricants or other

residuals from the manufacturing process. The filter vessel shall be designed in accordance with ASME boiler and Pressure vessel code

section VIII, division-I. Each vessel shall have type bolts and nuts of SS-304. Each vessel shall have a cover gasket with Buna N "O" rings. The vessel shall be provided with both clean and dirty water drain nozzles, as well as an air vent at the top. Each vessel shall be provided with a cover-lifting davit arrangement capable of lifting the cover and swinging it to the side. Each vessel shall be provided with a flanged inspection port shall be installed on the clean side plenum 90 degree from the inlet centre line.

1.2.2.4. HIGH PRESSURE PUMPS

3 x 50% high pressure pumps for each stage (i.e. Stage– I & Stage– II each) shall be provided to feed the pressurized water in RO membranes of each stage.

NP-26

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 19 OF 71

The HP feed pump shall be of a horizontal multistage centrifugal type. The high-pressure

pump shall be designed not to introduce flow and/or pressure pulsation in the feed or brine stream. The reverse osmosis system has to be operated with fluctuating feed salinity and feed temperature. An appropriate regulation of the feed pressure for each reverse osmosis train separately by a corresponding design of the high-pressure pumps and automatic feed pressure control is required.

Selection of parameters (Capacity & Head) of HP Pump & its drive shall take into account requirements of membrane manufacturer and shall be designed to deliver required parameters throughout the design life of membrane. The power consumption to be guaranteed for the HP Pump shall be based on its parameters at the end of guaranteed membrane life. HP pump shall also be designed for lowest operating temperature at the end of membrane life.

Further design shall also take care of the concentrate back pressure requirement at downstream of the energy recovery unit.

The complete unit shall include the pump, motor drive and the lubrication system on a common base plate.

Tensional analysis (in accordance with API 610) shall be performed for the complete train comprising the HP pump and motor. Excitation of frequencies in accordance with API 610 shall be performed.

1.2.2.5. PERMEATE BOOSTER PUMP

Permeate water from the RO trains shall be discharged to a common header. Requirement of permeate booster pumps shall be decided as per the hydraulics of the plant /post-treatment degassifier units. If the permeate pressure is adequate the same may be delivered to post-treatment degassifier directly from RO units Stage- I then the same shall not be provided. Otherwise the permeate booster pumps shall be provided for the system. Number of permeate booster pumps shall be same as that of number of RO streams / trains plus one common standby.

1.2.2.6. REVERSE OSMOSIS SYSTEM The Reverse Osmosis system is being provided to make Filter Water suitable Input to MB exchanger for meeting De-Mineralised (DM) water requirements. RO system consists of following:- Three (3 x 50%) cartridge filters shall be provided in the upstream of each RO Stage (i.e. Stage –I & Stage– II). The filter element shall be cylindrical cartridges constructed from continuous wound polypropylene fibres. Cartridge shall be self-supporting with no reinforcing structures. UF treated/permeate water shall be fed to the suction of the High-pressure feed pump and is pressurised by High-pressure feed pump (3 x 50%) stage -I and then fed to RO membranes (2 x 50%) Stage -I. The RO reject generated of Stage– I is led to drain for further disposal to neutralizing pit. Further degassed water duly passed through the cartridge filter shall be fed to the suction of the High-pressure feed pump and is pressurised by High-pressure feed pump (3 x 50%) stage -II and then fed to RO membranes (2 x 50%) of Stage– II. The RO reject generated of Stage –II shall be led to UF permeate water storage tank. Each RO stream shall be provided with a dedicated HP pump and one store stand-by. The HP pump shall be able to discharge reject against a backpressure without the need for additional pumping equipment. At the discharge side of the HP feed pump a pressure control valve shall be installed to regulate the feed pressure to the membrane assembly according to the salinity of the feed water. The HP pump shall be designed to operate in the entire range of operation of the feed system.

NP-27

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 20 OF 71

Filtered water shall be pressurized so that part of it is driven through a semi permeable membrane, whereby the required driving force must exceed the osmotic pressure of the brine. Brine leaving the permeator outlet connection at a pressure close to the feed pressure shall be controlled by a flow control valve. The permeate water is discharged to product water system where it is treated to for removal of excess CO2, correction of pH etc. and stored. Cleaning and Flushing systems shall be provided for membrane protection. While the cleaning system facilitate cleaning of the fouled membranes and the flushing system flushes the membranes off High TDS water with low TDS water during shutdown operation. Each RO train or stream shall be a self-contained section, with its own feed, reject and product flow control equipment, operable thru control system from the Water system control room. Each train/ stream shall be cleaned and treated separately, independent of other trains/streams production. A train/stream is composed of one or more blocks (membrane assembly unit) connected in parallel and each block comprise group of modules in parallel. Each RO module is basically cylindrical pressure vessel containing membrane elements. The term element means a single RO membrane element (permeators). Each block (membrane assembly unit) shall be provided with necessary valves and piping to facilitate block wise isolation, monitoring and cleaning facility. All wetted parts in the plant shall be constructed with suitable corrosion resistant material suiting to the process fluid.

1.2.2.6.1 RO MEMBRANE ASSEMBLY

Each stream shall be capable of operating either independently or in combination with the other ones. The streams shall be skid-mounted and be furnished complete with all headers and related piping, mounted on the skid. The skid shall contain all necessary supports, fixings and clamps required to support the permeators, headers and related piping. The skid shall be designed such that adequate space for servicing and monitoring of the equipment shall be available. The removal of a single permeator or a major piece of the equipment must be possible, without removing surrounding equipment and also while the RO-train is in operation, by means of flexible, self-closing couplings. Design and selection of RO stream/ train will be such that (i.e. it will be divided into certain number of equal blocks which can operate independently) it can facilitate the following advantages: Repair/maintenance of permeators/ pipes/ valves and chemical cleaning in a particular block can

be carried out without shutdown the whole stream. For easier Performance monitoring of permeators, simpler fault identification to render permeators

replacement activities easier.

1.2.2.6.2 RO MEMBRANE

The Reverse osmosis membrane shall be spiral wound type. The membrane shall be non-telescopic, non-flexing and leak free.

NP-28

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 21 OF 71

The membranes provided for the RO process of this project shall be one of the following membrane manufactures.

Dow chemicals– Filmtec Hydronautics. KOCH membranes -Fluid systems. Toray

Salt rejection of each RO membrane and minimum undiminished salt rejection of each RO train shall be decided by System supplier. The membrane system process design calculation shall be provided by system supplier during detail engineering stage and the same shall be duly vetted by the membrane manufacturer. The system supplier shall take 'fouling allowance and salt passage' into consideration while preparing the process design calculation document during the guaranteed (specified) life of the membrane. The process design calculation shall adopt to produce the specified capacity of permeate with an average flux rate as specified in "Technical Data Sheet". The average flux rate shall be calculated based on effective membrane area considering standard length & diameter element. For the designed water quality and the permeate water capacity required, the RO Plant shall be designed, tested to perform and guaranteed to have an undiminished overall recovery of not less than 85%. Notes:-

I) Standard Length & Diameter of membrane used for design will be made available from at least three (3) manufacturers to deliver water of specified quality so that Employer may install membranes from other manufacturers during operation stage of the plant. The design calculation shall furnish data regarding change in parameters of the RO plant such as design net output, recovery, energy consumption etc. in case such alternate membranes are used later by Employer in the Membrane Assembly supplied by System supplier.

II) Normalisation of performance during operation of the RO plant shall be made using

membrane manufacturers software supplied as a part of the system. The exact methodology for the normalization of capacity shall be submitted by the membrane manufacturer.

1.2.2.6.3 CHEMICAL DOSING SYSTEM

A set of chemical dosing system (Sodium Meta bisulphate dosing (SMBS dosing) system; Anti Scalant dosing system & acid dosing system (as applicable)) is provided to condition feed water before entering to RO Stage– I & Stage- II. Each dosing system consists of one chemical measuring tank and two (2 x 100%) dosing pumps.

1.2.2.6.4 CLEAN IN PLACE SYSTEM (RO MEMBRANE CLEANING SYSTEM)

RO membrane cleaning system shall include a set of chemical pumps, chemical holding tank and micron cartridge filter shall be provided.RO membranes cleaning of Stage– I & Stage- II shall be automatic after receipt of signal, except for filling of cleaning solution, which will be manual. The cleaning system shall be designed for cleaning and sterilizing of minimum one train of the RO system (Stage– I & Stage– II) separately.

NP-29

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 22 OF 71

The RO-plant shall be provided with fixed pipe connections. The flexible couplings from the cleaning pipe work to the RO-trains shall be reached from the ground level, or sufficient and safe facilities for easy handling of the coupling of the permanently installed cleaning pipe work at the RO-racks and the flexible cleaning pipe work of the cleaning equipment has been provided. The cleaning system shall be of skid-mounted type and comprise all necessary equipment for control of the necessary flow rate and pressure during cleaning and enable the recycling of brine and product to the cleaning tank, or alternately, the discharge of these two effluents during the cleaning procedure. The tank volume shall be sufficient to clean in minimum one RO-train/stream by utilization of only a single batch of cleaning solution. Sizing considerations also shall include the minimization of batch temperature' and variation in solution concentration caused by blending cleaning solution with displaced feed water contained in the RO permeators. One number of micron cartridge filter shall be provided in the cleaning system to prevent the reintroduction of any insoluble material into the membranes. A temperature control system shall be provided to prevent re-circulated fluid temperature from exceeding the maximum recommended operating temperature of the membrane. The cleaning tanks shall be provided with level measurement for safe operation i.e. tripping of cleaning system pumps under low water level. Provisions shall be made for the neutralization and disposal of chemical cleaning waste via brine reject.

1.2.2.7. PRESSURE VESSELS

Pressure vessels shall have a diameter and length so as to contain required numbers standard diameter, standard length spiral wound elements. Materials to be selected shall meet the following minimum requirements: Membranes: As per manufacturer Pressure vessels: PP or proven material as per manufacturer End caps or plates: Non.-metallic material of proven Reliability may also be used subject to approval; Fiberglass epoxy as minimum requirement. Segmental rings, Corrosion resistant material conforming to Connectors ASTM A312 S31254 / ASTM A 744 CN3MN/ ASTM A995 Gr 5A/ ASTM A1049 F56 / F57/ ASTM 890 Gr 5A/ ASTM A182 F44 or ASTM A 473 S3260 (depending on form of product used) or equivalent. Coupling: Victaulic / Equivalent of SS-316 Details of the design, fabrication, and testing requirements for the pressure vessels shall be in accordance with ASME Section X to allow a code stamp or meet the minimum requirements of ASME Section X.

NP-30

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 23 OF 71

Vessels shall be designed to allow membrane elements to be connected to a permeate port at both ends of the vessel so that permeate can be taken from either ends. The unused pressure vessel permeate port shall be available and piped to permit probing. End closures shall be approved for use in pressure vessel construction to the code requirements.

1.2.2.8. FLUSHING SYSTEM

Flushing system for RO stage– I and Stage– II consist of 2 nos. (2 x 100%) flushing pumps shall be provided to enable flush-out of the RO unit stream including HP pump, with low TDS permeate water during shut down of the stream. The flushing water feed pipeline and the drain lines shall be designed for the high flow rate that is expected during flushing. The flushing water feed lines shall be connected upstream of the each HP pump inlet and the flushing feed line shall be provided with a motorized flush feed valve. The shutdown program shall automatically initiate the flushing feed valve to open and flush the RO train when required.

1.2.2.9. DEGASSER SYSTEM

3 x 50 % degassed water storage tanks shall be provided. Each Degassed water storage tank shall be provided one no. of tower to store degassed water. 4 nos. of degassed blower one per tower and one common stand by and 4 nos. of degassed water transfer pumps shall be provided to meet the system requirement along with required piping valves, fittings and instrumentation as required to make the system complete. Degasser tower shall be designed to reduce dissolved CO2 in treated water to the level as indicated in the guarantees. Blowers shall be provided to remove CO2 from water. Degassed water pumps shall be provided to supply water to cartridge filter. Design and fabrication of the tank shall be according to BS: 2594- Specification for carbon steel welded horizontal cylindrical storage tanks.

1.2.2.10. RO PERMEATE STAGE –II SYSTEM

1 no. RO permeate stage –II storage tank shall be provided to store product water from the Stage – II RO and 3 nos. (3 x 50 %) of RO stage –II permeate transfer pumps shall be provided to meet the system requirement along with required piping, valves ,fittings and instrumentation.RO stage– II permeate transfer pumps shall be provided to feed the RO permeate of stage –II to mixed bed. Tank storage capacity will be of 30 minutes and hence effective capacity of this tank will be 35 m3.Material of construction of tank will be MSEP (Mild steel epoxy pained). Design and fabrication of the tank shall be according to BS: 2594 - Specification for carbon steel welded horizontal cylindrical storage tanks.

1.2.2.11. MIXED BED EXCHANGE UNITS

Three (3 x 50 %) numbers mixed bed ion exchanger unit having cation and anion exchanger resin shall be provided to obtain the desired DM Water Quality. MB shall be rated for a normal flow rate as described in Data sheet-A with minimum 24 hours of continuous operation. The flow rate shall be sized

NP-31

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 24 OF 71

suitably to meet the regeneration water requirement. The MB shall be vertical, rubber lined (internally), welded plate steel construction and fabricated at per IS: 2825/ ASME Section VIII/ acceptable equivalent standard. Design pressure shall be the maximum expected pressure to which the vessels may be subjected to plus 5% additional margin. Design pressure shall be minimum 8 Kg/cm² (g). The inlet distribution, under drain collecting systems and regenerant inlet distribution system / middle collector shall be so designed as to give uniform distribution and flow without channelling and obstruction. The inlet distribution system shall preferably be header lateral type. Material of construction shall be mild steel with rubber lining (MSRL) and rubber covered (RC). Under drainage system shall be header lateral or strainer-on-plate type. In case of header lateral system, header shall be mild steel "rubber lined inside and rubber covered outside" (MSRL & RC) and lateral of polypropylene. For Mixed-Bed Exchanger, separate distributor shall be provided for influent and regenerant entry. The influent and alkali regenerant distributor and acid regenerant distributor shall be MSRL & RC. The interface collector & distributor shall be of suitable acid/ alkali resistant material. The under drain collector system shall be header lateral or strainer-on-plate type and shall be adequately designed to ensure uniform distribution of flow. The regenerant distributor and middle collector shall be mild steel rubber lined inside and rubber covered outside. All internal studs /nuts / washers shall be of AISI 304 L for alkali service and Hastealloy-B/ Suitable material for acid service. At least 100% free board shall be provided over resin bed below the backwash outlet nozzle and in straight portion of vessel to allow for expansion during backwashing and for addition of extra resin, if required. Suitable sample connection shall be provided for all the units. All MB Exchangers shall be provided with two additional nozzles for hydraulic transfer of resin as and when necessity arises. The nozzle shall be provided with manual valves of 100 mm NB. . Each exchanger unit shall be provided with resin traps on treated water outlet line. Resin traps shall also be provided both on the backwash and regenerant outlet lines. The resin trap in these backwash and regenerant lines shall be flanged at one end and will be connected at end of the respective pipeline. The other end shall be open to the drain so that the flow can be seen to check the chocking of the trap. However in case thoroughfare regeneration is adopted proceeding unit shall have resin traps at the outlet along with differential pressure transmitter for alarm. Flow measuring instrument shall also be provided at the regenerate outlet of preceding unit in case of thorough fare regeneration. The DM Water generated from MB shall be stored in DM Water storage tank (not included in the DM plant package scope).

1.2.2.12. EXCHANGE RESIN

Cation and anion resin shall be of reputed make and must have been in use capable of producing water of quality as specified or better, for a period of not less than three (3) years. Cation and anion resin charge shall consist of material properly selected washed, processed and graded to provide the guaranteed capacity and life and shall have adequate abrasion resistance during its guaranteed life.

NP-32

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 25 OF 71

The cation exchanger resin used in the mixed bed exchanger shall be strongly acidic, high capacity polystyrene resin in the bead form. The anion exchanger resin used mixed bed shall be strongly basic, high capacity resin (Type-I) in bead form. The anion resin shall be able to withstand a temperature of 60 deg. C (minimum) continuously. Strong Base Anion resin (or weak base Anion in case of hook-up) shall be MACROPOROUS type only.

1.2.2.13. DM REGENERATION PUMPS

Two nos. (1W+1S) horizontal centrifugal DM regeneration pumps shall be provided to transfer water from DM water storage tank to Mixed Bed exchanger backwash, regeneration, chemical preparation, chemical dilution and rinse activities.

1.2.2.14. MIXED BED AIR BLOWERS

2 x 100% capacity (1W + 1S) air blowers to supply the required quantity of compressed air at requisite pressure for mixing the Anion and Cation resins after regeneration in the mixed bed units shall be provided.

1.2.2.15. MIXED BED REGENERATION SYSTEM

The ion exchange resin shall be regenerated by employing optimum regeneration level to prevent leakage of ions. Cation resins shall be regenerated by hydrochloric acid (30-33% w/v technical grade IS: 265) and anion resins by sodium hydroxide (48% w/v rayon grade in flakes or lye form as per IS: 252). The strength of acid regenerant and alkali regenerant at the cation and anion bed inlet shall be selected accordingly. Type regeneration technique (co-current or counter-current) shall be selected during detail engineering as per the proven practice of the system Supplier. The process calculation shall be furnished indicating the various steps of regeneration, regeneration level employed, total and used exchange capacity of resins, resin quantity provided etc. The document shall also include relevant resin literature & curves indicating, various parameters and exchange capacity & regeneration levels selected along with the process calculations. Process calculation document shall be submitted along with the operating exchange capacity and regeneration levels which will be duly vetted by resin manufacturer, document will also include the resin performance curves applicable for selected resin for DM plant. Regeneration facilities offered shall be complete with acid/alkali measuring tanks, metering pumps for dosing of chemicals shall be provided as per datasheet-A. Acid or alkali from the measuring tank shall be injected to exchangers by means of hydraulically operated metering pumps at suitable strength as specified in Data sheets. Automatic block and bleed valves shall be provided at the regenerant inlet line(s) to each exchanger of Mixed (MB) Bed. Regeneration shall be initiated on conductivity signal. 1 no. acid storage tank and 1 no. alkali storage tank shall be provided for the storage of acid & alkali. Chemicals for the MB exchanger. 2 nos. (2 x 100%) of acid unloading pumps and 2 nos. (2 x 100%) of alkali unloading cum transfer pumps shall be provided for unloading of acid & alkali chemicals.

NP-33

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 26 OF 71

1 no. hot water tank shall be provided for the supply hot water during the winters for chemical dilution purpose. 1 no. activated carbon filter and 1 no. alkali preparation tanks shall be provided to prepare alkali solution from the flakes. Suitable sampling connection shall be provided for acid/ alkali storage, preparation & handling equipments. The regeneration & service cycle shall be semi- automatic. Manual selector switch shall be provided for manual override. “MB trouble” group alarm shall be provided in Water system control room. Flow of acid/alkali solution from bulk storage tank to measuring tanks shall be automatic by gravity.

1.2.2.16. SAFETY AND PROTECTION 2 numbers of automatic safety shower units consisting drench shower and eye bath shall be provided near regeneration area & chemical storage area to provide adequate spray of water to protect operating personnel against any chemical hazard. The shower shall receive supply of water from the filtered water system and will be actuated by standing on platform beneath the showers through mechanical linkage. Safety shower shall consist of the following:-

A platform supported on hinges/bearings and capable of actuating a linkage through a pull rod/chain or by a platform.

A deluge shower head and eye unit each with individual actuating unit and the same shall stay open till manually closed.

Control valves, actuated by the pull rod/foot-paddle. Isolating valve and pipe work.

1.2.2.17. NEUTRALISING SYSTEM

Design the MB exchanger in such a way that the regenerant effluent from the mixed bed unit is self-neutralising. However lime dosing provision shall be made to neutralise the effluent, whenever required. Provision shall also be made to neutralise total waste generated from the DM Plant. The arrangement shall be as follows: Chemical Cleaning waste Ultra Filtration System, RO chemical cleaning waste, RO stage –I waste, Regeneration waste from mixed bed exchangers shall be led into drain near these systems and transferred into a gravity trench suitably lined leading to neutralising pit. 1 no. acid measuring tank for N-pit and 1 no. alkali measuring tank for N-Pit with to meet the system requirement along with required piping, valves, fittings and instrumentation. Provision of acid & alkali dosing in the Neutralisation pit shall be manual & by gravity only. Mixing arrangement with recirculation from the discharge pump shall be provided in each compartment for proper mixing and maintaining uniform pH value of the waste. pH meters with low pH alarm shall be provided for proper monitoring of the pH value. N-Pit waste recirculation/ disposal pumps shall be provided in neutralising pit. The pH of waste effluent shall be kept around 6.5 to 8.5 Neutralised water shall be suitably. Waste disposal pipeline of HDPE/ CPVC/ MSRL construction from disposal pump shall be terminated directly to guard pond of ETP.

NP-34

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: I

REV.NO. 1 DATE : 04.06.2014

SHEET 27 OF 71

1.2.2.18. SAMPLE PANEL

Each RO unit/ train shall be fitted with a fiberglass sample board, which shall be mounted adjacent to the unit. The panel and supports shall have all fiberglass constructions with a minimum 8" wide trough under the sample cocks with 1" PVC drain pipe routed to the trenches. Sample tubing shall be black tubing. The sample panel shall use ¼ " SS sample cocks to sample the following:

Feed (locate on common manifold) Concentrate (locate on common manifold) Permeate (locate on common manifold) Permeate from each pressure vessel

Sample valves shall be SS white snap-action valves and shall be fitted with plastic nozzles tubes.

NP-35

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 1 OF 15

MAJOR TECHNICAL PARAMETERS PRE-TREATMENT PLANT & LET SYSTEM

1.0 AERATOR 1.1 Nos. & Type One (1) No., Cascade Type 1.2 Material of construction RCC 1.3 Design flow 3200 m3/ hr. + 3% for sludge 1.4 Surface flow rate 0.03 m2/ m3/ hr. 2.0 INLET VALVES 2.1 Inlet valves One (1) number motorized butterfly flow control valve, located at inlet to aerator , with

manual upstream and downstream isolation valves along with by-pass motorized butterfly flow valve. Control valve shall have “auto manual” selection option, position indicator with “open-close” push buttons. Inching operation of valve shall be possible from DCS Panel .

2.2 Inlet control valve size Suitable to cater to total flow. 2.3 Code AWWA – C 504 for butterfly valve. 2.4 Control Under “Auto” mode of flow control valve, valve shall automatically maintain the level

of water in the Clarified water distribution chamber, i.e. valve shall automatically close when distribution chamber level becomes high.

3.0 STILLING CHAMBER 3.1 No. One Number. 3.2 Purpose To dampen out any turbulence of the incoming water. 3.3 Retention time 60 seconds . 3.4 MOC & Construction type RCC, Circular/ Rectangular 3.5 Design Flow 3200 m3/ hr. + 3% for sludge. 3.6 Overflow and drain arrangement Suitable overflow and draining arrangement shall be provided for the stilling chamber

and the same shall led up-to filter backwash sump. 4.0 PARSHALL FLUME & INLET CHAMBER 4.1 Parshall Flume 4.1.1 No. Three (3) numbers 4.1.2 Purpose To measure flow. 4.1.3 Material of construction RCC 4.2 Inlet Chamber 4.2.1 Capacity To suit the system requirement 4.2.2 Material of construction RCC 5.0 HRSCC (HIGH RATE SOLID CONTACT CLARIFIER) 5.1 Number Two (2) numbers PT-CW Clarifiers and One no. PT-DM Clarifier 5.2 Capacity (Net output) PT-CW Clarifier -1550 m3/hr. (each); PT-DM Clarifier -110 m3/hr. 5.3 Type & MOC High Rate Solids Contact Type Clarifier (HRSCC), RCC 5.4 Effluent water quality Refer details in Technical Specification Section C1, Sub-Section VI. 5.5 Height 4 Meter (Minimum) 5.6 Rise rate 2.5 m3/ m2/ hr. 5.7 Weir loading 300 m3/ m/ day. 5.8 Average flow velocity 3 m3/ m2/ hr.

5.9 Sludge Blow-off to sludge sump By gravity through telescopic stand-pipe for continuous discharge and through

manual operated blow-off valve for intermittent. Pipe material: CI class A as per IS: 1536.

5.10 Platform with hand railing Shall be provided (1 meter wide all along Clariflocculator) by bidder.

5.11 Rake bridge Shall be provided (MOC: MS) by bidder. Gearbox for bridge drive shall be either of oil-free type.

5.12 Flocculation agitator Vertical slow speed motor reduction gear driven.

5.13 Material of pipe from inlet chamber to clarifier

Carbon Steel pipe encased with concrete for buried portion and externally epoxy painted inside clarifier.

6.0 CLARIFIER SCRAPPERS 6.1 Type Supplier’s Specific. 6.2 Number required One assembly per clarifier. 6.3 Material Mild steel (MS) with rubber inserts (with Bitumastic paint protective coating)

6.4 Protective coating All wetted portion painted with minimum three (3) coats of Bitumastic heavy duty paint over two (2) coats of epoxy based primer. Total thickness = 400 microns.

6.5 Traction drive Slow speed motor driven through reduction gear unit or VFD as per manufacturer standard.

7.0 SUITABLE ACCESSORIES 7.1 Access ladder, platform, staircase, hand Shall be provided of structural steel by bidder.

NP-36

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 2 OF 15

railings etc.

7.2 Walkway Shall be provided with hand railings around launder periphery of width 1000 mm, by bidder.

7.3 Electrical requirements For each clariflouculator, one (1) Distribution Board to be located on clariflocculator bridge for all drives of clariflocculator bridge assembly.

8.0 PRESSURE SAND FILTERS 8.1 Type Vertical Shell Type with dished ends 8.2 No. of filters Two (2) (2 x 50%) 8.3 Design flow rate per filter 35 m3/ hr. (each) 8.4 Service run 24 hrs. 8.5 Backwash flow rate 24 M3/M2/hr. (Minimum) 8.6 Free board 75% 8.7 Design Code IS 2825/ ASME Sec VIII Div.-I 8.8 Thickness As per IS 2825/ ASME Sec VIII Div.-I 8.9 Supporting material Graded gravel 8.10 Design Pressure Shut-off head of Potable Water Pump (100 MWC) + 5% margin. 8.11 Material of Construction IS 2062 and IS 2002. 8.12 Minimum bed depth 1200 mm (excluding supporting material) 8.13 Surface flow rate 10 M3/M2/hr. 8.14 Filter Media Anthracite/Sand/Gravel/Pebbles/Equivalent. 8.15 Shell thickness 6 MM (minimum) 8.16 Thickness tolerance/Allowance 2 mm Corrosion allowance + 0.2 mm mill tolerance. 8.17 Manhole One (1) in each vessel

8.18 Sight windows with minimum clear width of 75 mm. Two (2) min in each vessel

8.20 Filter media trap Shall be provided at filter outlet and backwash water outlet of each filter.

8.21 Air scour blower for PT-CW Pressure Sand Filters

2 Nos. (1W+1S); Type- Rotary twin lobe/ centrifugal Capacity & head as required. MOC- Casing, Cover, Stator, Impeller/ Lobe: Cast Iron IS: 210 Gr. FG 260 Shaft: Carbon steel BS- 970 EN-8/ ANSI-1045. Accessories: Suction filler, safety valve, check valve, base frame, anti-vibratory panels, V-belt guard and foundation bolts etc.

9.0 SLUDGE COLLECTION PIT 9.1 Number One (1) in two sections with common sump interconnected through valve. 9.2 Capacity (effective) 125 m3 each section 9.3 Dimension Suitable 9.4 Material RCC 9.5 Location Shall be finalized during detailed engineering (DDE). 9.7 Level indicator Provided by bidder as indicated in enclosed P&ID. 9.8 Level transmitter Provided by bidder as indicated in enclosed P&ID. 9.9 Special arrangement Agitation/ recirculation line shall be provided by bidder in sludge transfer pit. 9.10 Sludge pump house One (1) no., MOC-RCC (under indus. Shed) 9.11 Air scour blower 2 Nos. (1W+1S); Capacity- 400 m3/ hr. and head as required. 9.12 Electrical monorail hoist in pump house One (1) No., Capacity-1 Ton

9.13 Sludge disposal pumps

Number- Two (2) nos. (1W+1S), Capacity- 100 m3/ hr. and head as required. Operating speed: Max. 1500 RPM. Service of duty: Continuous. Suction condition- submerged. Type- Vertical and non-clog type. Impeller type- Open. Working fluid type- Sludge water with particle size up to 10 mm. Type of discharge: Above floor discharge (with separate discharge pipe in addition to column pipe). Type of lubrication- Grease. Shaft coupling type: Flexible/ Rigid Operating floor level: Min. 500 mm above FGL MOC- Suction Bell/ Casing: 2% Ni CI, IS: 210 Grade FG 260; S-0.1% max. P-0.15% max., Impeller, Stuffing box, Gland: 2% Ni CI, IS: 210 Grade FG 260, Shaft/ Shaft coupling/ Shaft sleeves: SS 410, Column & discharge pipe, shaft enclosing tube (if applicable): CS as per IS: 2062 or Eq., Gland Packing: TIWA, Gaskets: Neoprene rubber, Bolts & nuts: SS for those coming in contact with water and for others, material shall be high tension CS, Base Plate and soleplate: CS (min. 10 mm thick).

10.0 FILTER BACK WASH WATER PIT 10.1 Number One (1) in two sections with common sump interconnected through valve.

NP-37

123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 3 OF 15

10.2 Material of construction RCC 10.3 Capacity (each section) Adequate to hold 150% of backwash generated from one filter 10.4 Backwash water pump house One (1) no., RCC (under indus. Shed) 10.5 Electric Monorail hoist in pump house One (1) no., Capacity- 1 Ton

10.6 Filter Backwash Pumps

Number- Two (2) nos. (1W+1S), Capacity- each pump shall be capable of evacuating the capacity of complete pit within 2 hrs. and head as required. Type- Vertical and non-clog type. Operating speed: Max. 1500 RPM. Working fluid type- Turbid backwash water from filters. Impeller type- Open. Service of duty: Continuous. Suction condition- submerged. Type of lubrication- Grease. MOC- Suction Bell/ Casing: 2% Ni CI, IS: 210 Grade FG 260; S-0.1% max. P-0.15% max., Impeller, Stuffing box, Gland: 2% Ni CI, IS: 210 Grade FG 260, Shaft/ Shaft coupling/ Shaft sleeves: SS 410, Column & discharge pipe, shaft enclosing tube (if applicable): CS as per IS: 2062 or Eq., Gland Packing: TIWA, Gaskets: Neoprene rubber, Bolts & nuts: SS for those coming in contact with water and for others, material shall be high tension CS, Base Plate and soleplate: CS (min. 10 mm thick).

11.0 OVERHEAD STORAGE TANK

11.1 Number One no. Filtered water overhead storage tank (FW O/H Tank) and One no. clarified water overhead storage tank (CW O/H Tank).

11.2 Capacity & MOC 100 m3 (min) for FW O/H Tank and 10 m3 (min) for CW O/H Tank, RCC

11.3 Float operated level control valve One (1) no. in each tank; Angular (Stem & lever operated) rubber seated valve; MOC: Body & Bonnet:- CI; Float:- Brass/ Copper; Stem: SS-304

12.0 CHEMICAL HOUSE 12.1 Number One (1). 12.2 Type Two storied building of civil construction.

12.4 Ground floor Storage of chemical Alum, PAC, and FeCl3 required for 15 day, MCC, Control Room, Toilet Block.

12.5 First floor All chemical tanks & dosing systems. 13.0 WEIGHING SCALE FOR CHEMICAL 13.1 Type Platform, dial type. 13.2 Number Two (2) 13.3 Capacity 0-500 & 0-2000 Kgs 14.0 HOIST 14.1 Type Electric monorail in chemical house 14.2 Number Two (2). 14.3 Capacity 1 T 15.0 CHEMICAL DOSING 15.1 PAC DOSING SYSTEM FOR CLARIFIER (@ 10 ppm)

15.1.1

PAC Solution Preparation Tank–

Number-Two (2) numbers Capacity- Each tanks shall be sized for 12 hours requirement of all working PT-CW Clarifiers and Lamella Clarifier/ Tube settler of LET System at design capacity. Type – vertical cylindrical. Material of construction- RCC (with acid/ alkali resistant tiles) Level Transmitter- One (1) number per tank. Level Gauge - One (1) number per tank. Motorized Stirrer (MOC-SS316)- One (1) number per tank with reduction gear unit. Dissolving Basket (MOC SS316)- One Number per tank.

15.1.2 PAC Dosing Pump-

a) Number, Capacity and Head Number- Five (5) numbers [3 (2W+1S) for PT Clarifiers & 2 nos. (1W+1S) for tube settler/ lamella clarifier of LET system].. Type- Simplex hydraulically operated diaphragm type Capacity- DDE. Liquid to be handled- PAC solution 10% W/ V Pump stroke speed per minute: Max. 100. Capacity control- 10-100% of capacity manually by micro-meter dial Material- SS-316 [all wetted parts (pump head valve, valve housing etc.), valve spring]; Diaphragm/ Packing- PTFE; Shaft- Hardened steel EN-8-BS-970.

b) MOC and accessories

Pumps shall be provided with accessories such as Y-type suction strainers, pressure dampeners, pressure gauge, safety relief valves etc.

15.2 ALUM DOSING SYSTEM (@ 40 ppm)

15.2.1

Number-Two (2) numbers Capacity- Each tanks shall be sized for 12 hours requirement of all working PT-CW Clarifiers and Lamella Clarifier/ Tube settler of LET System at design capacity.

NP-38

123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 4 OF 15

Alum Preparation Tank – Type – vertical cylindrical. Material of construction- RCC (with acid/ alkali resistant tiles) Level Transmitter- One (1) number per tank. Level Gauge - One (1) number per tank. Motorized Stirrer (MOC-SS316)- One (1) number per tank with reduction gear unit Dissolving Basket (MOC SS316)- One Number per tank.

15.2.2 Alum Dosing Pump-

a) Number, Capacity and Head Number- Five (5) numbers [3 (2W+1S) for PT Clarifiers & 2 nos. (1W+1S) for tube settler/ lamella clarifier of LET system]. Type- Simplex hydraulically operated diaphragm type. Capacity- DDE. Liquid to be handled- Alum solution 10% W/ V Pump stroke speed per minute: Max. 100. Capacity control- 10-100% of capacity manually by micro-meter dial. Material- SS-316 [all wetted parts (pump head valve, valve housing etc.), valve spring]; Diaphragm/ Packing- PTFE; Shaft- Hardened steel EN-8-BS-970.

b) MOC and accessories

Pumps shall be provided with accessories such as Y-type suction strainers, pressure dampeners, pressure gauge, safety relief valves etc.

16.0 PT-DM AND PT-CW CLARIFIED WATER STORAGE TANKS & PUMP HOUSE 16.1 No. of storage tanks One no. in twin section for each storage tank. 16.2 MOC RCC. 16.3 Effective capacity of each tank 35 m3 (each section) for PT-DM and 65 m3 (each section) for PT-CW 16.4 Pump house Under Shed with Electric monorail hoist (1 ton min capacity) 17.0 WASTE SERVICE WATER SUMP (CIVIL DESIGN & WORK BY NBPPL) 17.1 No. of service water sump/ tank One in two section with common sump interconnected through valves 17.2 Capacity & size sump/ tank Refer P&ID for LET system 17.3 Material of construction RCC 17.4 Oil skimmer Required with an oil drum for collection of oil 17.5 Waste/ treated service water pumps Refer details indicated in data sheet 17.6 Monorail hoist in pump house 1 No., 1 ton capacity 18.0 TUBE SETTLERS/ LAMELLA CLARIFIER 18.1 Number 1 No. 18.2 Design flow 100 m3/hr. for each tube settlers/ lamella clarifier 18.3 Material of construction RCC 18.4 No. of flash mixer One no. per tube settlers/ lamella clarifier with required agitator 18.5 Material of construction of agitator SS316 18.6 Tube Settler/ Lamella Clarifier Plates

MOC MSEP

19.0 CENTRAL MONITORING BASIN (ABOVE GROUND) 19.1 No. of basin 1 no. in twin sections 19.2 Material of construction RCC with cover 19.3 Effective capacity Refer P&ID for LET system 19.4 Final effluent disposal pumps Refer details indicated in data sheet 19.5 Electric monorail hoist in pump house 1 No., 1 ton capacity 20.0 WASTE SERVICE WATER TRANSFER PUMPS 20.1 Location Near plant drains as indicated in Layout drawings. 20.2 Total no. of pumps Two ( 1W+1S) 20.3 Guaranteed flow of each pump 100 m3/ hr. 20.4 Total head (guaranteed) As required. 20.5 Operating speed 1500 RPM (nominal) 20.6 Pumps and drives to be designed for Outdoor duty 20.7 Service of duty Continuous 20.8 Type of pumps Vertical wet pit, and non-pull out type.

NP-39

123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 5 OF 15

20.9 Type of working fluid Untreated drain water 20.10 Max. water temperature 36 deg. C 20.11 Minimum water temperature 25 deg. C 20.12 Type of discharge Above floor discharge 20.13 Type of impeller Closed/ Semi-open 20.14 Type of lubrication Forced water 20.15 Suction condition Submerged 20.16 Maximum water level Local finished grade level (FGL) 20.17 Operating floor level Minimum 500 mm above FGL 20.18 Type of shaft coupling Flexible/ Rigid 20.19 MOC o Suction bell: 2% Ni-Cl; IS 210 Gr. 260; S-0.1% & P- 0.15% max.

o Casing bowl: 2% Ni-Cl; IS 210 Gr. 260; S-0.1% & P- 0.15% max. o Impeller: ASTM A351 CF8M o Wearing rings (if applicable): As per manufacturer’s std. o Impeller shaft, pump & line shaft, Shaft coupling, Shaft sleeves: SS ASTM A 276

Gr. 410 o Shaft bearings: Cut less rubber with bronze retainer for bearing below minimum

water level and Thordon type bearing for bearings above minimum water level. o Column pipe: Fabricated steel as per IS:2062 (min. thickness shall not be less

than 8 mm) with 2 coats of epoxy coating inside & outside. o Shaft enclosing tube; Fabricated steel (refer note no. 3 below) o Discharge head: Fabricated steel as per IS:2062 (min. thickness shall not be less

than 8 mm) with 2 coats of epoxy coating inside & outside. o Distance piece (if applicable): Fabricated steel as per IS:2062 (min. thickness

shall not be less than 10 mm) with 2 coats of epoxy coating inside. o Matching flanges: Fabricated steel as per IS: 2062 o Stuffing box, Gland: 2.5% Ni-Cl to IS 210 FG-260 o Gland packing: Impregnated TEFLON o Gaskets: Wire reinforced rubber gasket/ neoprene rubber/ compressed asbestos

fiber. 20.20 o Bolts and nuts: SS AISI type 304/316 for those coming in contact with water and

for others, material shall be high tension carbon steel. o Base plate and soleplate: Fabricated steel as per IS:2062.

Accessories to be provided (each pump) o Companion flanges with nuts, bolts and gaskets, positioning dowels, eye bolts, lifting etc.

o Internal piping with valves, filters & instruments for sealing/ cooling/ lubrication system up to and including isolation valve etc. as per requirement.

o Non-reverse ratchet shall be provided as per manufacturer’s std. 20.21 Other technical requirements o Refer ‘Vertical (wet pit) Pumps’ Specification enclosed. 21.0 TREATED EFFLUENT DISPOSAL PUMPS 21.1 Location Near CMB. 21.2 Total no. of pumps Two ( 1W+1S) 21.3 Guaranteed flow of each pump 100 m3/ hr. 21.4 Total head (guaranteed) 60 MWC. 21.5 Operating speed 1500 RPM (nominal) 21.6 Pumps and drives to be designed for Outdoor duty 21.7 Service of duty Continuous 21.8 Type of pump casing Preferably radially split type 21.9 Type of working fluid Treated effluent

21.10 Max. water temperature 45 deg. C 21.11 Minimum water temperature 33 deg. C 21.12 Type of impeller Closed/ Semi-open 21.13 Type of lubrication Grease

NP-40

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 6 OF 15

21.14 Suction condition Flooded suction 21.15 Type of shaft sealing Gland packing 21.16 Type of coupling (motor & pump) Flexible 21.17 MOC o Casing: 2.5% Ni-Cl IS 210 Gr. FG 260

o Impeller: ASTM A351 CF8M o Wearing rings (if applicable): SS 316 o Shaft/ Shaft sleeves: SS-410 o Stuffing box/ Gland: 2.5% Ni-Cl IS 210 Gr. FG 260 o Gland packing; TIWA o Mechanical seal: Not applicable. o Gaskets: Neoprene rubber o Bolts and nuts: SS for those coming in contact with water and for others,

material shall be high tension carbon-steel. o Base plate: Carbon steel

21.18 Accessories to be provided (each pump) o Companion flanges with nuts, bolts and gaskets etc. o Internal piping with valves, filters & instruments for sealing/ cooling/

lubrication system up to and including isolation valve etc. as per requirement. o Positioning dowels, drain plugs, vent valve etc. o Coupling guards, eye bolts, lifting etc.

21.19 Other technical requirements o Refer ‘Horizontal Pumps’ Specification enclosed.

NP-41

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 7 OF 15

RO-DM PLANT FILTERED WATER TRANSFER PUMPS

1.1 Type of Pumps Vertical Centrifugal pumps (Vertical wet pit, non-pull out type) 1.2 Location PT-DM Clarified Water Storage Tank & Pump House in PT Plant area. 1.3 Number Two (1W+1S) 1.4 Capacity and Head 110 m3/ hr., Head as per suit to system requirement. 1.5 Operating Speed (Max.) 1500 rpm

1.6 Pumps & Drives to be designed for Outdoor duty

1.7 Duty Continuous 1.8 Type of Working Fluid Filtered Water 1.9 Type of impeller Closed / Semi-open 1.10 Type of lubrication Self-water 1.11 Type of shaft coupling Flexible / Rigid 1.12 Suction Condition Submerged 1.13 Type of Pump Casing Axially split 1.14 Material of Construction 1.14.1 Suction Bell 2% Nickel Cast Iron IS: 210 Grade FG 260; S-0.1% max. P-0.15% max 1.14.2 Casing / Bowl 2% Nickel Cast Iron IS: 210 Grade FG 260; S-0.1% max. P-0.15% max 1.14.3 Impeller CF8M

1.14.4 Impeller Shaft, Pump & line shaft SS 410

1.14.5 Shaft coupling SS-410 1.14.6 Shaft sleeves SS-410

1.14.7 Column pipe Fabricated steel as per IS: 2062 (minimum thickness shall not be less than 8 mm) with 2 coats of epoxy coating inside & outside.

1.14.8 Discharge Head Fabricated steel as per IS: 2062 (minimum thickness shall not be less than 8 mm) with 2 coats of epoxy coating inside & outside.

1.14.9 Distance piece (if applicable) Fabricated steel as per IS: 2062 (minimum thickness shall not be less than 10 mm) with 2 coats of epoxy coating inside & outside.

1.14.10 Matching flanges Fabricated steel as per IS: 2062 1.14.11 Stuffing box 2.5% NI-CI to IS:210 FG-260 1.14.12 Gland 2.5% NI-CI to IS:210 FG-260 1.14.13 Gland packing Impregnated TEFLON 1.14.14 Gaskets Wire reinforced rubber gasket / Neoprene rubber /Compressed Asbestos Fiber

1.14.15 Bolts & nuts Stainless steel AISI type 304/316 for those coming in contact with water and for others, material shall be high tension carbon steel.

1.14.16 Base plate and Soleplate Fabricated steel as per IS: 2062

1.14.17 Accessories

a) Companion flanges with nuts, bolts and gaskets, Positioning dowels, Eye bolts, lifting etc. b) Internal piping with valves filters & Instruments for sealing cooling lubrication system up to and including isolating valve etc. as per requirement. c) Non -reverse ratchet (as applicable).

1. ULTRA FILTRATION SKIDS 2.1 Number Two (2) nos. (2X50%)

2.2 Capacity Net output capacity of each stream shall be to match with gross capacity of RO + water required for backwashing of UF membrane + chemical preparation requirements+ 5% margin over the above total requirements.

2.3 Feed Temperature 10°C - 35°C 2.4 Mode of Operation Dead End/ Cross Flow 2.5 Type of Operation Automatic Back wash, including backwashing sequence through DDCMIS. 2.6 Type of membrane Hollow Fiber 2.7 Type of membrane mounting Horizontal / Vertical

2.8 Rated Pressure 250 PSI or 10% higher than maximum pressure encountered in the system whichever is higher.

NP-42

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 8 OF 15

2.9 Number of module As per system requirement 2.10 Size of module As per manufacturer’s standard practice 2.11 Recovery from UF 95 %

2.12 Backwash provision UF Permeate from UF product cum backwash storage tank. Backwash rate and frequency shall be as per system requirement.

2.13 Membrane Element type Hollow Fibre 2.14 Pore size of membrane As per manufacturer’s standard practice

2.15 Molecular Wt. Cut Off (MWCO) 80,000 -1, 00,000 Daltons (Max.)

2.16 Flux rate 50-60 LMH 2.17 Material of Construction

2.17.1 Pressure tubes FRP 2.17.2 Membrane elements Polysulfone /Polyether sulphone / PVDF 2.17.3 Housing PVC 2.17.4 Frame material Carbon steel

3. UF PERMEATE WATER STORAGE TANKS 3.1 Number One number 3.2 Fluid to be stored UF PERMEATE 3.3 Type of Tanks Vertical Cylindrical Atmospheric 3.4 Design Standard IS: 803 3.5 Capacity UF back wash water requirement of 1 hour for both the streams + 50% margin (Min). 3.6 Material of Construction MS as per IS 2062 with Epoxy painted. 4. UF BACKWASH WATER PUMPS

4.1 Type of Pumps Horizontal Centrifugal 4.2 Number 1 Working for each stream + 1 common stand by ( 2W+1 common SB) 4.3 Capacity and Head Capacity suitable for backwashing of one UF and head as per system requirement 4.4 Duty Intermittent 4.5 Suction Condition Flooded 4.6 Type of Pump Casing Axially Split 4.7 Material of Construction

4.7.1 Casing 2% Ni CI IS-210 Gr. FG 260 4.7.2 Impeller CF8M 4.7.3 Shaft and shaft sleeve SS 410 4.7.4 Shaft sealing Gland

5. UF FAST FLUSH PUMPS (as applicable) 5.1 Type of Pumps Horizontal Centrifugal 5.2 Number 1 Working for each stream + 1 common stand by ( 2W +1 common SB) 5.3 Capacity and Head Capacity suitable for backwashing of one UF and head as per system requirement 5.4 Duty Intermittent 5.5 Suction Condition Flooded 5.6 Type of Pump Casing Axially Split 5.7 Material of Construction

5.7.1 Casing 2% Ni CI IS-210 Gr. FG 260 5.7.2 Impeller CF8M 5.7.3 Shaft and shaft sleeve SS 410 5.7.4 Shaft sealing Gland 6.0 UF PERMEATE TRANSFER PUMPS 6.1 Type of Pumps Horizontal Centrifugal 6.2 Number 1 Working for each stream +1 common stand by ( 2W+1 Common Stand By) 6.3 Capacity and Head Capacity & Head as per suit to system requirement 6.4 Duty Continuous 6.5 Suction Condition Flooded 6.6 Type of Pump Casing Axially Split 6.7 Material of Construction 6.8 Casing 2% Ni CI IS-210 Gr. FG 260 6.9 Impeller CF8M

6.10 Shaft and shaft sleeves SS 410 6.11 Shaft sealing Gland

7. MICRON CARTRIDGE FILTER FOR STAGE-I & STAGE -II 7.1 Number Three (3) (2 W+ 1 SB) nos. for each stage (total 6 nos.) 7.2 Fluid Handled Permeate of UF & Permeate of RO stage -I

NP-43

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 9 OF 15

7.3 Capacity Capacity of one Cartridge filter same as capacity of one UF 7.4 Type Horizontal/ Vertical type 7.5 Filtration efficiency 90 % down to 5 microns 7.6 Material of Construction

7.6.1 Filter element Polypropylene (Continuously wound) 7.6.2 Filter casing and internals SS 316 7.6.3 Internals SS 316 7.6.4 Externals SS 316

8. HIGH PRESSURE FEED PUMPS FOR STAGE-I & STAGE -II 8.1 Number 1 Working for each RO train +1 common standby for each stage RO

8.2 Purpose To pump filtered water at the downstream of Cartridge filters up to the Degasser towers through RO trains.

8.3 Total number 6 nos. (3 nos. for RO-1st stage & 3 nos. for RO- 2nd stage). 8.4 Type Horizontal Centrifugal 8.5 Capacity To suit the Gross capacity of each RO train 8.6 Head (RO train Feed Pressure + frictional loss in the system) +10% margin 8.7 Type of Pumps Horizontal Centrifugal 8.8 Duty Continuous 8.9 Suction Condition Flooded

8.10 Type of Pump Casing Axially Split 8.11 Type of impeller Closed /Semi-open 8.12 Max. pump operating speed 1500 RPM /2900 RPM 8.13 Material of Construction

8.13.1 Casing ASTM A 351,CF8M 8.13.2 Impeller ASTM A 351,CF8M 8.13.3 Shaft SS -316 8.13.4 Shaft sleeve AISI -420 or equivalent. 8.13.5 Mechanical seal SS 8.13.6 Wear rings SS -316 8.13.7 Sleeves ASTM A451, grade CF8M or equivalent

8.13.8 Bolting Stainless steel for those coming in contact with water and for others, material shall be high tension carbon steel.

9. REVERSE OSMOSIS TRAINS/STREAMS 9.1 Number of trains Two (2X50%) 9.2 Turn Down Capability One or both the trains shall be operable as per system requirement. 9.3 Design Capacity (Net) Net output capacity of each RO Train 35 m3 / hr. 9.4 MEMBRANE ASSEMBLY UNIT (BLOCK)

9.4.1 No. of Membrane (Block) per Train One or more as per design

9.4.2 No. of Membranes/ module 6-8

9.4.3 Guaranteed Design Recovery Not less than 85%

9.5 Elements 9.5.1 Membrane type Polyamide, Spiral wound 9.5.2 Diameter & Length As per manufacturer standard 9.5.3 Average Flux < 20 L / m2h 9.5.4 Fouling Allowance for design Minimum 5% per year 9.5.5 Salt passage increase Minimum 10% per year 9.5.6 Membrane MOC Polyamide 10. CLEAN IN PLACE SYSTEM

10.1 CHEMICAL TANK 10.1.1 Number One(1)

10.1.2 Capacity & Head 1.2 times the chemical required for one RO-train /stream for both RO stages by utilization of only a single batch of cleaning solution (minimum). & head to suit to system.

10.2 CHEMICAL CLEANING PUMPS 10.2.1 Numbers Two (1W+1S) nos. 10.2.2 Type Horizontal Centrifugal 10.2.3 Design Flow and Head To suit the system requirement. 10.2.4 MOC SS 316 10.3 MICRON CARTRIDGE FILTER (FOR CHEMICAL CLEANING)

NP-44

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 10 OF 15

10.3.1 Number One (1) No. 10.3.2 Capacity To suit chemical cleaning pump capacity 10.3.3 Filtration efficiency 90% down to 5 micron 10.3.4 Filter Element Polypropylene wound filament

10.3.5 Material of filter casing and internals SS 316

11. DEGASSER TOWERS 11.1 Fluid handled Permeate from RO units 11.2 Type of Tower Forced Draft type 11.3 No of Towers Three (3) (2 W + 1 S ) 11.4 Design Flow rate/ Tower 35 m3 / hr. 11.5 Material of Construction

11..5.1 Shell material MS as per IS 2062

11.5.2 Internal lining Material & Thickness 4.5 mm thick rubber lining inside (as per IS 4682, Part-I) in three layers 1.5 mm each.

11.5.3 Fill (packing) material Polypropylene or equivalent 12. DEGASSER BLOWERS

12.1 Type Centrifugal 12.2 Location Outdoor 12.3 Numbers One (1) per tower with a common stand by; Total 4 Nos. 12.4 Duty Continuous

12.5 Minimum Capacity of each Blower 100% requirement of one degasser tower

12.6 Discharge Head (min.) As per suit to system requirement 12.7 Max. Speed of Blower 1500 RPM 12.8 Material of Construction Blower- CS, Intake filters/dampers/ Doors-CS 12.9 Accessories Required Suction filter, Silencer, relief valve, V-belt guard etc. 13. DEGASSED WATER TRANSFER PUMPS

13.1 Location Near Degasser Units 13.2 Working Fluid De-cationised water 13.3 Total Number of Pumps One per MB unit with a common stand by, Total 4 Nos.

13.4 Guaranteed Flow of each pump 35 m3/hr.

13.5 Total head (Guaranteed) As per suit to system requirement 13.6 Operating Speed 1500 rpm

13.7 Pumps and drives to be designed for Outdoor duty

13.8 Service of duty Continuous 13.9 Type of pump casing Preferably Radially Split type 13.10 Type of impeller Closed / Semi Open 13.11 Type of lubrication Grease 13.12 Suction condition Flooded suction 13.13 Type of Shaft Sealing Mechanical Seal

13.14 Type of coupling (motor & pump) Love-joy coupling

13.15 Material of Construction 13.15.1 Casing ASTM A CF 8M 13.15.2 Impeller ASTM A CF 8M 13.15.3 Wearing rings (if applicable) SS -316 13.15.4 Shaft SS -410 13.15.5 Shaft sleeves SS -410 13.15.6 Mechanical Seal SS -316

13.15.7 Bolts & nuts Stainless steel for those coming in contact with water and for others, material shall be high tension carbon steel.

13.15.8 Base plate Carbon steel (Epoxy painted)

13.15.9 Accessories to be provided with each pump

a) Companion flanges with nuts, bolts and gaskets, Internal piping with valves filters & Instruments for sealing/ cooling/lubrication system up to and including isolating valve etc. b) Coupling guards, Eye bolts, lifting etc.

14. DEGASSED WATER STORAGE TANKS 14.1 Fluid to be stored Degassed permeate from Degasser Tower. 14.2 Type Horizontal cylindrical atmospheric with dished (Torishpherical type) ends.

NP-45

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 11 OF 15

14.3 Design Standard (for Dia., length & thickness) As per BS: 2594. However dished ends shall be of Torishpherical type.

14.4 Numbers Three (3) nos. (2 W+1 S) 14.5 Effective Capacity 35 m3 (of each Tank) 14.6 Material of Construction

14.6.1 Shell material MS as per IS 2062

14.6.2 Shell (Internal) lining Material & Thickness 4.5 mm thick rubber lining inside (as per IS 4682, Part-I) in three layers 1.5 mm each.

14.6.3 Accessories a) Manhole for the tank, required operating platform, ladder etc. b) Vent, Overflow and drain connections with required valves.

15. MIXED BED UNIT 15.1 Type Vertical Shell Type with dished ends 15.2 Nos. required Three (3) nos. (2 W+ 1 SB) 15.3 Design Flow /unit (Net) Net output of 35 m3/ hr. 15.4 Service cycle 24 hours (period between Two successive regenerations)

15.5 Design Surface Flow Rate at design flow Not more than 35 M3/M2/Hr.

15.6 Shell & Dish End Material MS as per IS 2062 15.7 Shell & Dish End Lining

(internal) 4.5 mm thick rubber lining inside (as per IS 4682, Part-I) in three layers 1.5 mm each.

15.8 External Painting Chlorinated Rubber paint 15.9 Manhole Two (2) per vessel (Min.) 15.10 Sight glasses Two (2) minimum per vessel (Minimum clear width shall be 75 mm) 15.11 Resin Type Strongly acidic and strongly basic Type-I, both the resin shall be of high capacity

polystyrene resins in bead form. 15.12 Regeneration By NaOH & HCL 15.13 Total resin bed depth 1000 mm ( minimum) 16. AIR BLOWER FOR MIXED BED

16.1 Number Two (2 X 100%) 16.2 Type Centrifugal /Twin Lobe Type 16.3 Capacity and discharge

pressure Capacity suitable for mixing anion and cation resin in a mixed bed vessel and discharge pressure as per system requirement

16.4 Duty Intermittent 16.5 Location Outdoor 16.6 Material of Construction

16.6.1 Casing Cast Iron IS 210 FG 260 16.6.2 Lobe Cast Iron IS 210 FG 260 16.6.3 Shaft EN 8 16.6.4 Gear EN 353 16.6.5 Drive and driven pulley Cast Iron IS 210 FG 260 16.6.6 Safety valve Aluminum spring loaded 16.6.7 Lubrication Self-lubricated / oil lubricated 16.6.8 Accessories Suction filter, silencer, safety valve, base frame, anti-vibratory pads, v belt, motor

pulley and blower pulley, foundation bolts 17. DM REGENERATION PUMPS

17.1 Location DM Water Pump House located near DM tank Area 17.2 Working Fluid DM water 17.3 Total Number of Pumps Two (2) nos. (1W+1SB) 17.4 Guaranteed Flow of each

pump As per suit to system requirement

17.5 Total head (Guaranteed) As per suit to system requirement 17.6 Operating Speed 1500 rpm 17.7 Pumps and drives to be

designed for Outdoor duty

17.8 Service of duty Continuous 17.9 Type of pump casing Preferably Radially Split type 17.10 Type of impeller Closed / Semi Open 17.11 Type of lubrication Grease 17.12 Suction condition Flooded suction 17.13 Type of Shaft Sealing Mechanical Seal 17.14 Type of coupling (motor&

pump) Love-joy coupling

NP-46

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 12 OF 15

17.15 Material of Construction 17.15.1 Casing ASTM A CF 8M 17.15.2 Impeller ASTM A CF 8M 17.15.3 Wearing rings (if applicable) SS -316 17.15.4 Shaft SS -410 17.15.5 Shaft sleeves SS -410 17.15.6 Mechanical Seal SS -316 17.15.7 Bolts & nuts Stainless steel for those coming in contact with water and for others, material shall be high

tension carbon steel. 17.15.8 Base plate Carbon steel (Epoxy painted) 17.15.9 Accessories to be provided

with each pump

a) Companion flanges with nuts, bolts and gaskets, Internal piping with valves filters & Instruments for sealing/ cooling/lubrication system up to and including isolating valve etc. b) Coupling guards, Drain plug, Vent valve, Eye bolts, lifting etc.

18. FLUSHING PUMPS 18.1 Type of Pumps Horizontal Centrifugal 18.2 Purpose Flush-out of the RO unit/stream of both stages including HP pump of both RO

stages, with low TDS permeate water during shut down of the stream 18.3 Number Two (2) nos. ( 1W+1SB) 18.4 Capacity and Head As per suit to system requirement 18.5 Duty Intermittent 18.6 Suction Condition Flooded 18.7 Type of Pump Casing Axially Split 18.8 Material of Construction

18.8.1 Casing ASTM A 351,CF8M 18.8.2 Impeller ASTM A 351,CF8M 18.8.3 Shaft SS -316 18.8.4 Shaft sleeve AISI -420 or equivalent. 18.8.5 Mechanical seal SS 18.8.6 Wear rings SS -316 18.8.7 Sleeves ASTM A451, grade CF8M or equivalent 18.8.8 Bolting Stainless steel for those coming in contact with water and for others, material shall be high

tension carbon steel. 19 SMBS AND ANTISCALANT DOSING SYSTEM

19.1 SMBS Dosing Tanks (Na2S2O5 Anti –oxidant)

Anti - Scalant Dosing Tank

19.1.1 Numbers Required One no. each 19.1.2 Capacity To suit to system requirement 19.1.3 MOC FRP 19.1.4 Tank Mixer/ Agitator Turbine Agitator 19.1.5 MOC of mixer/ agitator SS 316

19.2 SMBS (Anti –oxidant) Dosing Pumps

Anti Scalant Dosing Pumps

19.2.1 Numbers Two (1W+1S) 19.2.2 Type Positive Displacement type 19.2.3 Capacity and Head As per system requirement 19.2.4 MOC Poly Propylene

20. DESCRIPTION FOR CHEMICAL UNLOADING PUMP

ACID UNLOADING PUMPS ALKALI UNLOADING CUM TRANSFER PUMPS

20.1 Numbers Required. Two (2X100%) for each acid and alkali 20.2 Type Horizontal centrifugal 20.3 Location Outdoor 20.4 Service Intermittent 20.5 Capacity & Head 10 m3/hr. & 10 MWC 10 m3/hr. & 20 MWC 20.6 Liquid to be handled 30-33 % HCL 48 % alkali 20.7 Suction Condition Flooded 20.8 Suction Strainer Y type strainer shall be provided for each pump (MOC –PP)

20.9 Material of Construction

NP-47

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 13 OF 15

20.9.1 Casing and Impeller PP 20.9.2 Wearing rings PP 20.9.3 Base plate Carbon Steel 20.9.4 Type of Shaft Sealing Mechanical Seal 20.9.5 Pump Operating Speed 1500 rpm

20.9.6 Accessories required for each Pump Coupling guards, Drain plug, Vent valve, Y-type strainer

20.9.7 Type of coupling (motor& pump) Love-joy coupling

20.10 Reinforced rubber hoses with coupling & isolation valves

20.10.1 Nos. required Two (2) Two (2) 20.10.2 Size (mm) 80 80 20.10.3 Length 10 M 10 M 20.10.4 Material Reinforced rubber chemical resistant

21. DESCRIPTION FOR CHEMICAL STORAGE TANK

ACID STORAGE TANKS ALKALI STORAGE TANKS

21.1 Quantity (nos.) One (1) number each 21.2 Size (Dia. & length) AS per BS :2594 21.3 Location Outdoor

21.4 Capacity Each tank shall be sized for storing 30 days chemical requirement of DM plant or 15 m3, whichever is higher

21.5 Type & Pressure Class Horizontal with dished end, Atmospheric 21.6 Materials of Construction IS –2062 21.7 Protection / Lining

21.7.1 Inside 4.5 mm thick rubber lining inside (as per IS 4682,Part-I) in three layers 1.5 mm each. 21.7.2 Outside Chlorinated rubber Paint 21.8 Concentration 30 – 33% 48% lye or flakes 21.9 Fume absorber & seal pot Shall be provided by bidder for bulk acid storage tank 21.10 CO2 absorber & seal pot Shall be provided by bidder for bulk alkali storage tank

21.11 Vent ,overflow, drain & sample connection

Shall be provided by bidder for both the storage tanks

21.12 Manhole staircase, platform Shall be provided by bidder for both the storage tanks

22.0 TANKS CHEMICAL HANDLING/ PREPARATION

ACID MEASURING TANK FOR MB

ALKALI MEASU. TANK FOR MB

ALKALI PREPARATION TANK ( WITH FLAKES)

22.1 Quantity One no One no One no 22.2 Type Vertical, cylindrical & Atmospheric 22.3 Useful Capacity (each) To hold 1.25 times the chemical required for regeneration of MB (One stream) 22.4 Materials MS as per IS 2062 with 4.5 mm thick rubber lining inside (as per IS 4682, Part-I). 22.5 External Protection Chlorinated Rubber Paint

22.6 Vent, overflow, drain connection Required

22.7 Dissolving Basket Not required SS 316 SS 316 22.8 Agitator (Slow speed) - Motor driven stirrer -SS 316 Motor driven stirrer of SS 316 23.0 DOSING PUMPS ACID ALKALI NA 23.1 Quantity Two nos. each of 100

% capacity Two nos. each of 100 % capacity

NA

23.2 Capacity & Head Capable of meeting regeneration requirement of respective MB unit. Head as req. 23.3 Materials of Construction PP /Haste-alloy -B SS-316 NA 24. ALKALI FILTER

24.1 Type Vertical Shell Type with dished ends 24.2 Nos. required One 24.3 Fill Activated Carbon (Bed Depth not less than 1200 mm excluding supporting material) 24.4 Supporting Material for the fill Graded Gravel 24.5 Shell & Dish End Material Mild Steel as per specified code

NP-48

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 14 OF 15

24.6 Internal Painting Epoxy Painted 24.7 External Painting Chlorinated Rubber Paint 25. ALKALI DILUENT WATER HEATING TANK

25.1 Quantity One 25.2 Type Vertical, shell type with dished ends

25.3 Type of Heater/ Capacity Electric Heater with 2 X 50 % electrical heating coil / 125 % of water required for regeneration of one stream of mixed bed

25.4 Temp. of alkali to be heated To obtain temp of 50°C at alkali mixing-tee outlet from 15oC within 4 hours. 25.5 Burn Out Protection To be Provided

25.6 Material of Construction of tank

MS as per IS 2062 with 4.5 mm thick rubber lining inside (as per IS 4682, Part-I) in three layers 1.5 mm each.

25.7 Density meter 1 No. each dosing pump outlet 26. NEUTRALISATION PIT

26.1 No. of compartments One in two sections 26.2 Materials RCC

26.3 Effective Capacity

Each Section shall hold 125 % of total wastewater generated from following a) One regeneration of MB b) Chemical cleaning waste of RO + backwash of High pressure pumps c) Back wash & chemical cleaning waste and Ultra filtration system d) Tank drain

26.4 Isolation gates/valves Total 2 nos. ( 1no. in each compartment) 26.5 Protection Acid Alkali proof lining 27. EFFLUENT DISPOSAL PUMPS

27.1 Numbers Required. Two (2), (1 working + 1 stand-by) 27.2 Type Horizontal centrifugal single stage with priming system

27.3 Capacity (each) & Service Head Suitable to empty one compartment of N-Pit in one hour & Head as required.

27.4 Suction Condition Suction from priming chamber (2 nos.) 27.5 Material of construction

27.5.1 Casing MSRL 27.5.2 Impeller MSRL 27.5.3 Shaft SS 410/SS-316 27.5.4 Base Plate SS 316/CF8M. 27.5.5 Pressure gauge One number per pump with Teflon diaphragm seal 27.5.6 Pulsation dampener One number per pump 27.5.7 Recirculation Facility Shall be provided by bidder with entire arrangement 27.5.8 Suction Filter Shall be provided by bidder.

28. CHEMICAL TANK FOR NEUTRALISATION 28.1 Acid measuring Tank for N-pit Alkali measuring Tank for N-pit

28.1.1 Quantity (nos.) One One 28.1.2 Type of Construction Vertical cylindrical Vertical cylindrical 28.1.3 Effective Capacity 1.0 m3 1.0 m3 28.1.4 MOC with Inside Protection MS as per IS 2062 with 4.5 mm thick rubber lining inside (as per IS 4682, Part-I). 28.1.5 Outside Protection Chlorinated Rubber Paint. Chlorinated Rubber Paint. 28.1.6 Dissolving Basket Not applicable SS-316

28.1.7 Agitator Not applicable Constructed of SS -316. This shall have two sets of blade mounted on single shaft.

28.1.8 Accessories Each tank shall be provided with fume absorber for acid tank, CO2 absorber and seal pot for alkali tank, platform, ladder, hand hole, overflow, drain etc.

29. RO STAGE-II PERMEATE WATER STORAGE TANK 29.1 Fluid to be stored RO STAGE-II Permeate. 29.2 Type Horizontal cylindrical atmospheric (with dished (Torishpherical type) ends

29.3 Design Standard (for Dia., length & thickness) As per BS: 2594. However dished ends shall be of Torishpherical type

29.4 Numbers One (1) no.

NP-49

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1 SUB-SECTION: III

REV.NO. 1 DATE: 04.06.2014

SHEET 15 OF 15

29.5 Effective Capacity 35 m3 29.6 Material of Construction

29.6.1 Shell material MS as per IS 2062 29.6.2 Shell (Internal) lining Material Epoxy painted.

29.6.3 Accessories a) Manhole for the tank, required operating platform, ladder etc. b) Vent, Overflow and drain connections with required valves.

30.0 RO STAGE –II PERMEATE TRANSFER PUMPS 30.1 Type of Pumps Horizontal Centrifugal 30.2 Number 1 Working for each stream +1 common stand by ( 2W+1 Common Stand By) 30.3 Capacity and Head Capacity & Head as per suit to system requirement 30.4 Duty Continuous 30.5 Suction Condition Flooded 30.6 Type of Pump Casing Axially Split 30.7 Material of Construction 30.8 Casing 2% Ni-CI IS-210 Gr. FG 260 30.9 Impeller CF8M 30.10 Shaft and shaft sleeves SS 410 30.11 Shaft sealing Gland 31.0 Pressure Sand Filters for RO-DM Plant 31.1 Nos. Two nos. (2 x 100%) 31.2 Capacity 110 m3/ hr.

31.3 OTHER DETAILS (EXCEPT ABOVE) OF PT-DM PRESSURE SAND FILTERS SHALL BE SAME AS INDICATED IN THE DATA SHEET FOR PT PLANT.

32.0 OVERHEAD STORAGE TANK 32.1 Number One no. Filtered water overhead storage tank 32.2 Capacity & MOC 50 m3 (min), RCC

33.3 Float operated level control valve

One (1) no. in each tank; Angular (Stem & lever operated) rubber seated valve; MOC: Body & Bonnet:- CI; Float:- Brass/ Copper; Stem: SS-304

NP-50

123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: V

REV.NO. 1 DATE: 04.06.2014

SHEET 1 OF 4

SECTION – C1

SUB-SECTION- V

TERMINAL POINTS

NP-51

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: V

REV.NO. 1 DATE: 04.06.2014

SHEET 2 OF 4

1.0 TERMINAL POINTS 1.1 PRETREATMENT PLANT & LIQUID EFFLUENT TREATMENT (LET) SYSTEM

a) Raw water inlet pipe to PT Plant shall be terminated by NBPPL at 20 meter distance from centre line of Aerator central shaft.

b) Piping from PT- Clarifier sludge sump to ash slurry sump approximate 750 meters will be bidder’s scope.

c) Potable water line to Filtered water over head tank shall be in bidder’s scope. d) Alum and PAC dosing lines from respective dosing pumps located in PT Plant-Chemical house to

Tube settler/ Lamella Clarifier of LET System is in bidder’s scope. e) Clarified water line from Filtered Water Transfer Pumps discharge to Clarified Water Overhead

Tank (placed on top of Chemical House) shall be in bidder’s scope. f) Potable Water line from PT-Potable Pressure Sand Filters shall be terminated at 20 meter distance

from filters outlet by the bidder. Further Piping shall be in NBPPL’s scope. g) Treated effluent disposal pipe (LET System) (approximate 175 meter) shall be terminated at 5

meter from Service water tank [Service water tank completely excluded from bidder’s scope], (indicated in P&ID for LET System).

h) Waste service water pumps discharge pipe to Lamella Clarifier (approximately 400 meter) and recirculation line shall be in bidders scope.

i) Treated effluent from Treated effluent pump’s discharge shall be terminated at final disposal point (approximately 510 meter) (located near main plant gate).

1.2 RO-DM PLANT

a) Filtered Water Transfer Pumps (located at PT-DM Clarified Water Pump House) Discharge line to

RO-DM Plant shall be in bidder’s scope. b) UF backwash waste water generated from UF system to PT Plant Stilling Chamber by bidder. c) MB outlet/ discharge pipe line shall be terminated at the inlet nozzle of DM Water Storage Tanks

(approximately 100 meter) as indicated in the P&ID for RO-DM Plant enclosed with the specification.

d) DM Water inlet line from each DM water storage tanks to DM Regeneration Pumps and recirculation line from DM Regeneration Pumps discharge to individual DM Water Storage Tank’s recirculation nozzle shall be connected by the bidder as indicated in the P&ID for RO-DM Plant enclosed with the specification.

e) Effluent treated waste from Effluent Disposal Pumps (located near RO-DM Plant N-Pit) shall be terminated at Ash Slurry Sump (approximately 530 meter) by the bidder.

1.3 CHLORINATION PLANT

a) Inlet water line (motive water): Single tap off from CW/ ACW discharge header at 5 m distance from

Chlorination Plant building. Pressure available at terminal point will be 1.5 to 2.0 kg/cm2. b) Outlet line from chlorination plant building for CW chlorination: Up to the dosing point as indicated in

flow diagram. Length of the chlorine solution line will be 125 meters from chlorination plant building to dosing point.

c) Outlet line from chlorination plant building for PT chlorination: Up to the dosing point as indicated in P&ID. Length of the total chlorine solution line will be 300 meters for both dosing points (at stilling chamber and PT-CW Pressure Sand Filter outlet line) from chlorination plant to dosing point.

d) Inlet water supply for PT booster pumps shall be taken from Filtered water overhead storage tank placed at top of PT Plant -Chemical House. Pipe distance from PT plant chemical house to chlorination plant shall be in bidder’s scope.

NP-52

123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: V

REV.NO. 1 DATE: 04.06.2014

SHEET 3 OF 4

1.4 CW TREATMENT PLANT

a) Inlet water line from CW Pump discharge header shall be terminated by NBPPL at 5 meter from CW Treatment Plant.

b) Outlet Chemical Dosing line from respective dosing pump in CW Treatment Plant up to the dosing point at CW Forebay. (Distance between CW Forebay and CW Treatment Plant shall be approximately 50 m).

c) All drains of CW Treatment Plant:- All the drains from Acid storage area & from chemical preparation & dosing area of CW Treatment Plant shall be led to Lime Pit of CW Treatment plant through pipe and Lime- Pit over flow shall be connected to plant drain through pipe.

1.4 CONDENSATE POLISHING UNIT

a) Service vessel inlet (for CPU Service vessel area):– (OD 406.4 X 12.7 mm thick, SA 106 Gr-B) - Single piping connection at 10 meter distance from service vessel area shall be provided by BHEL/ NBPPL. Further piping is in bidder’s scope.

b) Service vessel outlet (for CPU Service vessel area):– (OD 406.4 X 12.7 mm thick, SA 106 Gr-B) - Single piping connection at 10 meter distance from service vessel area shall be terminated by the bidder.

c) Rinse water outlet (for CPU Service vessel area):- Rinse water outlet piping (OD 168.3 x 7.11 mm thick, SA 106 Gr-B) till condenser hot well is in the scope of bidder. (Approximate distance 70 meter).

d) 25 NB connection of Instrument Air supply at 5 to 8 kg/ cm2 (g)– At 10 meter distance from service vessel area of Condensate Polishing Unit. Further piping is in bidder’s scope.

e) 25 NB connection of Service Air supply at 5 to 8 kg/ cm2 (g)– At 10 meter distance from service vessel area of Condensate Polishing Unit. Further piping is in bidder’s scope.

f) Gland sealing water supply & analyser rack cooling water supply piping (for CPU Service vessel area ):- Service water connection (40 NB) at 10 meter distance from service vessel area. Further piping is in bidder’s scope.

g) DM Water Supply (for CPU Regeneration Area) –The DM water inlet connections shall be provided by BHEL at 10 meter from the foundation of DM Tanks of CPU at ground Level. Piping from the terminal point to inlet nozzle of the DM Water storage tanks & from outlet nozzle of the DM water storage tanks to the pump suctions (DM water regeneration pumps & DM water resin transfer pumps) shall be in the scope of bidder.

h) DM Pumps Recirculation Lines (for CPU Regeneration Area):– Piping from DM Pumps (DM water regeneration pumps & DM water resin transfer pumps) outlet lines to DM water storage tanks recirculation nozzle/ inlet nozzle shall also be in the scope of bidder.

i) 25 NB Instrument air supply at 5 to 8 kg/cm2 (g) – At 10 meter distance from the regeneration area of CPU. Further piping is in bidder’s scope.

j) 25 NB Service air supply at 5 to 8 kg/cm2 (g) - At 10 meter distance from regeneration area of CPU. Further piping is in bidder’s scope.

k) Drinking water (40 NB) and service water (50 NB) - At 10 meter distance from the regeneration building. However distribution and piping inside regeneration area will be in bidder’s scope.

l) CPU-N-Pit Effluent piping (150 NB) from N-Pit to ash slurry pump house shall be in bidder’s scope. The piping distance to be considered shall be 450 meters.

1.6 GENERAL

a) Potable water piping shall be terminated at 5 meter from PT Plant- Chemical House for Pre-Treatment Plant and LET System, Chlorination Plant Building for Chlorination Plant and CW Treatment Plant, CPU Regeneration Building, RO-DM Plant Building for RO-DM Plant and Chemical Lab.

NP-53

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: V

REV.NO. 1 DATE: 04.06.2014

SHEET 4 OF 4

b) Service water piping shall be terminated at 5 meter from PT Plant- Chemical House for Pre-Treatment Plant and LET System, Chlorination Plant Building for Chlorination Plant and CW Treatment Plant, CPU Regeneration Building, RO-DM Plant Building for RO-DM Plant and Chemical Lab.

c) Service air piping shall be terminated at 5 meter from PT Plant- Chemical House for Pre-Treatment Plant and LET System, Chlorination Plant Building for Chlorination Plant and CW Treatment Plant, RO-DM Plant Building for RO-DM Plant and Chemical Lab.

d) Instrument air piping shall be terminated at 5 meter from PT Plant- Chemical House for Pre-Treatment Plant and LET System, Chlorination Plant Building for Chlorination Plant and CW Treatment Plant, RO-DM Plant Building for RO-DM Plant and Chemical Lab.

e) DM Water connection for Chemical Laboratory shall be taken by the bidder from RO-DM Plant.

NP-54

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 1 OF 6

SECTION – C1

SUB-SECTION- VI

FUNCTIONAL GUARANTEES & LIQUIDATED DAMAGES

NP-55

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 2 OF 6

1. FUNCTIONAL GUARANTEES, LIQUIDATED DAMAGES FOR SHORTFALL IN PERFORMANCE AND GUARANTEE TESTS

The terms ‘’Performance Guarantees’’ wherever appears in this Section shall have the same meaning and shall be synonymous to’’ Functional Guarantees’’ Similarly the term ‘’Performance Tests’’ wherever appears in this Section shall have the same meaning and shall be synonymous to ‘’Guarantee Test(s)’’. The term ‘’BMCR’’ (Boiler Maximum Continuous Rating) appearing in the Technical Specification shall mean the maximum continuous steam output of Steam Generator at super heater outlet at rated parameters. The term ‘’TMCR’’ (Turbine Maximum Continuous Rating) appearing in the technical specification shall mean 500 MW electrical power output at generator terminals(power at generator terminals as per clause indicated in the sub- section) under 0% cycle make-up and 77 mm Hg (abs) condenser pressure unless used in conjunction with a different cycle make-up and/or a different condenser pressure.

1.1 PERFORMANCE GUARANTEES

General Requirements

I. The Bidder shall guarantee that the equipment offered shall meet the rating and performance

requirements stipulated for various equipment covered in this specifications. II. The guaranteed performance parameters furnished by the bidder in his offer, shall be without any

tolerance values and all margins required for instrument inaccuracies and other uncertainties shall be deemed to have been included in the guaranteed figures.

III. The bidder shall demonstrate all the guarantees covered herein during performance guarantee/acceptance test. The various tests which are to be carried out during performance guarantee/acceptance tests are listed in the specification. The guarantee tests shall be conducted by the bidder at site in presence of NBPPL/ CUSTOMER on each unit individually.

IV. All costs associated with the tests shall be included in the bid price. V. In case during performance guarantee tests, it is found that the equipment/system has failed to meet

the guarantees, the bidder shall carry out all necessary modifications and/or replacements to make the equipment/system comply with the guaranteed requirements at no extra cost to the NBPPL/ CUSTOMER and re-conduct the performance guarantee test(s) with NBPPL/ CUSTOMER’s consent. However if the specified performance guarantee(s) are still not met but are achieved within the Acceptable shortfall limit specified in the specification, NBPPL / CUSTOMER will accept the equipment/system/plant after levying liquidated damages as mention in the specification. If, however, the demonstrated guarantee(s) continue to be more than the stipulated Acceptable Shortfall Limit, even after the above modifications/replacements within ninety (90) days or a reasonable period allowed by the NBPPL/ CUSTOMER, after the tests have been completed, the NBPPL/ CUSTOMER will have the right to either of the following:

a) For Category-I Guarantees

Reject the equipment/system/plant and recover from the bidder the payments already made.

OR Accept the equipment/system/plant after levying liquidated damages as specified hereunder. The liquidated damages, for shortfall in performance shall be levied separately for each unit. The rates indicated are on station basis and per vessel basis respectively. The liquidated damages shall be pro-rated for the fractional parts of the deficiencies. The performance guarantees coming under this category shall be called ‘Category-I’ Guarantees.

NP-56

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 3 OF 6

b) For Category-II Guarantees

Reject the equipment/ system/ plant and recover from the bidder the payments already made. The performance guarantees under this category shall be called ‘Category-II’ Guarantees. Conformance to the performance requirements under category-II is mandatory.

c) For Category-III Guarantees

Reject the equipment/system/plant and recover from the bidder the payments already made.

OR Accept the equipment/ system after assessing the deficiency in respect of the various ratings, performance parameters and capabilities and recover from the contract price an amount equivalent to the damages as determined by the NBPPL, &/or NTPC. Such damages shall, however be limited to the cost of replacement of the equipments/systems replacement of which shall remove the deficiency so as to achieve the guarantee performance. These parameters / capacities shall be termed as Category-III, guarantees.

2. GUARANTEES UNDER CATEGORY- I

NIL 3. GUARANTEE UNDER CATEGORY –II

NIL

4. GUARANTEE UNDER CATEGORY –III 4.1. CONDENSATE POLISHING PLANT

Following shall be guaranteed by the Bidder in the relevant Guarantee Schedule of the Bid Document and falls under “GUARANTEE UNDER CATEGORY –III”:

a. Normal Operating Condition:

I. Guaranteed Design Flow of each Service Vessel of Condensate Polishing Plant shall be 640 Cum/hr.

II. Guaranteed service Cycle (Period between two successive regenerations) of each service vessel shall be 15 days (360 hours).

III. Bidder shall guarantee the number of hours of operation of each service vessel in hydrogen cycle and ammonia cycle mode.

IV. Quantity of Chemicals (30% HCL & 48% NaOH) per regeneration of each service vessel shall be guaranteed. Bidder to refer Technical Specification regarding minimum regeneration level to be employed while furnishing the guaranteed chemical consumption figures.

V. Effluent Quality of Condensate: o With specified Design Flow, influent quality, each CPU Vessel regenerated with

Guaranteed quantity of Chemical (Acid & Alkali), shall be guaranteed to maintain the effluent quality as specified in technical specification throughout the cycle (i.e. period between two successive regenerations) of 15 days (360 hours). No shortfall in guaranteed effluent quality will be accepted by the NBPPL / customer during the service cycle.

NP-57

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 4 OF 6

o Throughout the Service Cycle, each Service vessel regenerated with guaranteed chemicals shall treat the condensate with influent crud level of 25 ppb at its design Flow of 640 M3/ hr. and crud level of condensate at vessel outlet shall be guaranteed to be less than 5 ppb or less.

b. Unit Start up Condition:

With Design Flow, each Service vessel regenerated with guaranteed chemicals, useful service run of each service vessel between regeneration shall be guaranteed not be less than 50 hours and total crud content of the effluent shall not exceed 150 ppb considering an influent average crud level of 500 ppb in the condensate.

c. Pressure drop between inlet and outlet of Condensate Polishing (between inlet & outlet pipe)

unit with clean resin bed at design flow of 640 Cum/ hr. shall be guaranteed to be 2.1 Kg/ Sq. cm (g) or less.

d. Complete transfer (100%) of resin from service vessel to regeneration vessel shall be

guaranteed and demonstrated.

e. Vibration, parallel operation and noise level of all the pumps and blowers at the rated duty point shall be demonstrated at site.

f. Under condenser tube-leakage condition, the plant shall be designed for 2000 ppb TDS in

addition to the normal influent contaminants stated in the technical specification. The cation and anion load in 2000 ppb TDS shall be based on the circulating water analysis furnished elsewhere. Under such condition, both sodium content and silica content of the effluent shall be limited to 20 ppb maximum. Useful service run shall not be less than 50 hours.

4.2. PRE-TREATMENT PLANT & LET SYSTEM

a) CLARIFIER

Each clarifier unit of PT-CW system shall be guaranteed for an effluent capacity of not less than 1550 CU.M/ hr. meeting the effluent quality as mentioned below.

Each clarifier unit of PT-DM system shall be guaranteed for an effluent capacity of not less than 110 CU.M/ hr. meeting the effluent quality as mentioned below.

Effluent quality at the outlet of clarifiers (PT-CW & PT-DM system) shall be guaranteed for the

following:- o Organic matter: Less than 0.05 mg/ litre o Iron content: Less than 0.03 mg/ litre o Turbidity: Less than 10 NTU

Note: Organic matter shall be tested as per KMnO4 method

Each clarifier shall be tested to demonstrate the above mentioned Guarantees at site under P&G test. In addition, demonstration of satisfactory working of all the clarifiers, its drives, scrapper mechanism, operation of sludge blow-off etc., shall be demonstrated by bidder.

B) FILTRATION PLANT

The capacity of each pressure sand filters for PT-Potable system shall not be less than 35

NP-58

123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 5 OF 6

CU.M/ hr. meeting the effluent quality as mentioned below with one backwash and air scouring in not less than 24 hours or more. Backwash water requirement not to exceed 2% of the water treated between two successive backwashes.

Turbidity at outlet of each filter of PT Potable system shall not exceed 2 NTU.

Each filter shall be tested to demonstrate the above mentioned Guarantees at site under P&G test. In addition, demonstration of satisfactory working of all the filters, its backwashing operation, operation of various valves etc. shall be demonstrated by the bidder.

C) TUBE SETTLERS/ LAMELLA CLARIFIERS

Each Tube Settlers/ Lamella Clarifier shall be guaranteed for an effluent capacity of not less than 100 CU.M/ hr. meeting the effluent quality as mentioned below.

Effluent quality at the outlet of Tube Settlers/ Lamella Clarifier shall be guaranteed for the following:

o Effluent Turbidity 10 NTU at design flow. o Effluent Turbidity 15 NTU at 20% overflow condition. o Effluent Oil & grease 5 ppm (maximum)

Each Tube Settler/ Lamella clarifier shall be tested to demonstrate the above mentioned

Guarantees at site under P&G test. In addition, demonstration of satisfactory working of settler/ clarifiers, operation of sludge blow-off etc. shall be demonstrated by bidder.

4.3. RO-DM PLANT

A. Effluent from RO units shall be guaranteed to meet the following requirements, at rated capacity.

a) Total Dissolved Solids (TDS): 15 PPM. b) Carbon di-oxide (as CO2): 5 PPM.

B. Effluent from the mixed bed unit shall be guaranteed to meet the following requirements, at rated

capacity, throughout the period between two successive regenerations: a) Reactive Silica not to exceed -0.01 ppm as SiO2 b) Iron as Fe -Not detectable as per ASTM (ASTM-D-1068) c) Total Hardness -Not detectable. d) pH Value- 6.8 -7.3. e) Conductivity -Not more than 0.1 micromhos/ cm. at 25 deg. C

C. Quantity of Chemicals (30% HCL & 48% NaOH) per regeneration per MB shall be guaranteed.

D. Bidder to guarantee auxiliary power consumption for Degasser Water Transfer Pump as per Guaranteed power consumption figures indicated in this sub-section of technical specification. Bidder to note that technical loading will be applicable as per the ‘Notes’ indicated in ‘GUARANTEED POWER CONSUMPTION FIGURES’ format enclosed in Vol. II of this technical specification.

E) FILTRATION PLANT

The capacity of each pressure sand filters for RO-DM system shall not be less than 110 CU.M/ hr. meeting the effluent quality as mentioned below with one backwash and air scouring in not less than 24 hours or more. Backwash water requirement not to exceed 2% of the water treated between two successive backwashes.

NP-59

123
Highlight
123
Highlight
123
Highlight

TITLE:

1 X 500 MW UNCHAHAR TPP STAGE-IV

TECHNICAL SPECIFICATION FOR

WATER TREATMENT PACKAGES

SPECIFICATION NO. PE-TS-404-158-A001

VOLUME - I

SECTION - C1, SUB-SECTION: VI

REV.NO. 1 DATE: 04.06.2014

SHEET 6 OF 6

Turbidity at outlet of each filter of RO-DM system shall not exceed 2 NTU.

Each filter shall be tested to demonstrate the above mentioned Guarantees at site under P&G

test. In addition, demonstration of satisfactory working of all the filters, its backwashing operation, operation of various valves etc. shall be demonstrated by the bidder.

4.4. CHLORINATION PLANT

A. Each chlorinator for PT-Chlorination system shall have a capacity not less than 15 Kg/ hr. B. Each evaporator & Chlorinator of CW -Chlorination system shall have a capacity not less than

90 kg/ hr. C. Chlorinators of CW & PT chlorination shall have controllable capacity range of 20:1. D. Each chlorination plant shall be tested to demonstrate for above mentioned Guarantees at site

under demonstration test. In addition, demonstration of satisfactory working of chlorinators, evaporators, chlorine leak absorption system, efficiency of safety devices etc. shall be demonstrated by bidder.

4.5. CW TREATMENT PLANT

Guarantee Values of Scale, Corrosion, Fouling & Bio Fouling:-

A. Cumulative Corrosion Rate on Mild Steel < 3 mils/year B. Cumulative Corrosion Rate on Stainless Steel < 0.1mils/year C. Cumulative Corrosion Rate on Cu/Ni < 0.3 mils/year. D. Cumulative Scaling Rate of Internal Tube Surface Area of Condenser <15mg/dm2/year. E. Fouling Factor: Deterioration in Heat Transfer Coefficient shall not be more than 5% of the

original value just before commencement of the treatment programme. F. TVC (Total Viable Count) (Micro Biological Counts) < 1.2 x 100000 counts/ml of circulating

water. G. SRB (Sulphate Reducing Bacteria) <100 organisms/100 ml of circulating water.

NP-60

123
Highlight

NP-61

NP-62

NP-63

- - - - .- - - -- - - W y m t N o CS-1150-001-9 -- 1 hmcndn~cnr No. 01 I Page No. 22 of 31 1 < Pmjcct: Smgwh SI'PP-111(1x500 MW) - ' Uocumcnt No..CS-I 150-001-9-AMDT-I I I Pnckn~~.:El'C Package . --

136 of 314

NP-64

6042023
Rectangle

137 of 314

NP-65

6042023
Rectangle

138 of 314

NP-66

6042023
Rectangle

Bid Document No.: CS-I 150-001-9 j Amendment No. 01 I Pageso. 26 nf 31 Project Singrauli STPF-IIl(1x500 MW) I Document No.:CS-1150-001-9-AMDT-01 1 Package: EPC Package

FJ I -*:

, ... , ,., . .', ,, ~ . .. , . .. . "I- .* n , ,, , ~, . .,,*

1 .,, 139 of 314

NP-67

6042023
Rectangle

Amendment No. OP to Technical Specifications of Singrauli STPP Stagc-ILI (IXSUUMW) - EPC Pavkage

sL REFER=----? EXISTING MoOlFlED 1

140 of 314

NP-68

6042023
Rectangle
6042023
Rectangle

, (i) For Approval 2 2 CD - ROMs

/ (ii) FINAL 15

- 4 CD-ROMs

(iiif Analysis reports of equiprnentsl 2 2 CD - ROMs piping1 structures components1 systems employing software packages as detailed in the specifications

7. Erect~on manual "1st Submission" 4 Sets 2 CD - ROMs

8 Erection manual "FINAL" 4 Sets 4 CD ROMs

9 Operation & Maintenance manual "?st 4 Sets 2 CD - ROMs submission"

10 Operation & Maintenance manual 4 Sets 4 CD-ROMs "FINAL"

11 Plant Hand Book "1st Submission" 4 Sets 2 CD ROMs

12 Plant Hand Book "FINAL" 4 Sets 4 CD ROMs

13 Commissioning and Performance 4 Sets 2 CD-ROMs Procedure manual "1st Submission"

14 Commissioning and Performance 4 Sets 4 CD ROMs Procedure manual "FINAL" A

- SlNGRAULl STPP STAGE-111 TECHNICAL SPECIFICATION GENERAL TECHNICAL PAGE (1x600 M:W) SECTION - VI REQUIREMENTS $ O F 2

EPC PACKAGE PARS< Annsxure-VI

141 of 314

NP-69

11 S.NO / DESCRIPTION OF DOCUMENTS I NO OF PRINTS I NO. OF CD-ROMs 1 1 Performance and Functional

TEST REPORT

16 -

17

'18

19

-.

4 Sets

20

SINGRAULI STPP STAGE-Ill CHNICAL SPECIFICATION GENERAL TECHNICAL REQUIREMENTS

.~ .

4 CD ROMs

Welding Manual, Heat Treatment Manuals, Storage & preservation manuals

21

-- 22

Project completion report.

QA programme including Organisation for implementation and QA system manual (with revision- servicing)

Vendor details in respect of proposed vendors including contractor's evaluation report.

Manufacturing QPs, Field QPs, Field welding schedules and their reference documents like test procedures. WPS, PQR etc.

15

1

1

2

2

(I)

(ii)

1st Submission

Finai

ai\ Documentation Package for items I equipment manufactured and despatched to s~te

QA Documentation Package for field activities on equipment I systems at slie

4 CD ROMs

1 CD ROM

1 CD ROM

2 CD-ROMs

2 CD ROMs

For reviewlcomment

For final approval

4 Sets

4 Sets

2 Sets

2 Sets

2 CD ROMs

4 CD ROMs

4 CD ROMs

4 CD ROMS

142 of 314

NP-70

,, -.. AMENDMENT N0.02 TO T E C H ~ ~ . Z L SPECIFICATIONS FOR SINGRAULl STPP ~ i . : :ht-~ll (?xBo&Mw).- & P C . P ~ G ~ @ ~

/ b*______ _ I___ - ? . VI I !3 D-01 i ~ 5 7 & ~ - ~ 0 . 0 0 ( a ) Para-I The d,li disposa! !u.$ id be iev?li)@e-'J l.11r: ash dls110~31 arm has to.be dcv6lopcd

I iJr.l.> , ,i > .; o~,t,e . - o i ~ s i ~ c;n;:?[:d i:i th: full / 1.0; the s i o ~ l z e o r a h gencrafrd in t h ~ ' iull

WlODlFlED

Enclre Clatise is rwlaced with new 28 00.00 enclosed as Annexuue-I to this Amendment.

disposal area ea will,: i .coSist. .,. .. , . , , of ..: . . . constnicted tiefdre :d~&tirstlagoon is titled up.

EXISTING

28.00.00 Training of EMPLOYER'S Personnel

S L NO

I

life of the power (25 yrs). The ash disposal area will consist of . .. .. . constsucted before the first lagoon is filled UP.

.-.,' ' . ,:., . . life b f the-pawe~ ${3nt:.;'fZ.5, A: ..., y.rs). T49 capacity to be:gfo~~$g~;~,~$l$d,ir~ .the raiiirys ShBU,'be~::fl~qnnediifv~::.~i~$o~l , ,,,. . ..;:'+:>.~! ..+;,.., . .. cal)acity.af 121. ,m$Ii$$r:Clgm: ~ T l ~ e ash

then alternate raisings of ashdykes of 3 m then alteinate raisings o f a d t d y k ~ of 3 m / height each, using ash 8s tiisin ! height each wing ash 81 main ) .WJ

REFERENCE

The starter dykes of all three lagoons. shall be constr~icted using earth as the. main construction material to be arranged 'by Bidder. Once the starter dyke is filled,

' t ~ t r : i i i t J I i ~ r C G ) ~ S I T ~ L C I ~ O I ~ iilit~eriill, lnsy be cor~~irt~ctcd V i ! L I I I I : I I ~ c i i I I l:~.ce iiii [lie uliimcire height is rtschcd. iliddcr a

. .

Tbestafler $>.k?s.o be constructed. us c$tskucfion ,&er Bidaer. Once the'

lbo:rd of 1.5 ni ~11311 b ~ ' kpr ror stalrsr I to consider three (03) raisings in his ' W dyke a< \\.ell ;IS it1 ~ L ~ ~ S L ' L I L I ~ O I raisins. : plannin~ and design of dykcs. F~.ee CQ

Sec

VI

Clause No.

28.0000

Paral Line

Part

C

only starter ash dyke vvitll earth isjrt presently envisaged for all lagoous.

. , . ~

Sub- Sec GTR

. . : . . " . 6oardbF l.~'~m~shil'~.lb$~tiejit-fort:f . , . , , ~ s@rter dyke as well 6. i n , s ~ ~ $ ~ ~ e n t : r @ i s i n g s . Ooly starter @sil;;$~+$.~,y~tl~~~(?,?,$h . i s envisaged t~b~;p~cSTgge..~j;~r'd4er, ~ u t < ~ ~ ' ~ ~ & ~ g s ; , s p f i l ~ ~ e . i & $ f U ~ ~ d d ~ f ~ o m ... . ~ i d d k f , ~

Page No. 36 to 37 of 75

..,$$&$&

r g33@;4:.:0F; .s : . , . . ~. ,

BID DOCUMENT NO.:CS-$150-004-9 PROJECT: SIN~.&ULI STPP-lll(lx500 MW)

PACKAGE: EPC PACKAGE i

~mendment No.- Document No : CS-1150-001-9-AMDT-

143 of 314

NP-71

6042023
Rectangle

2;1 Gb 00 / I TRAINING OF EMPLOYUI'S PERSONNEL

Such training should cover the followtng areas as a m~nimum in order to enable these personnel to individually take the responsibility of operating and maintaining the power station in a manner acceptable to the Employer

I 23.01 00

I I (a) Training for SGrrG related C&l systems/equipments. I

The scope of service under training of Employer's engineers shall include a training module covering the areas of Operation & Maintenance.

(b) Training for special packages for various PC based systems specified elsewhere in Part-B of Technical Specification, Section-VI.

(c) Training for various C&I systemslequipment supplied including DDCMIS as detailed in Part-B of Technical Specification, Section-VI.

(d) Training for UPS systems Annunciation system, SWAS, PA system and flue gas analysers,

The exact details, extent and schedule for training shall be as finalised during detailed engineering and shall be subject to Employer's approval.

Bidder shall furnish in his offer, details of training module(s) covering above requirements which shall be subject to Employer's approval. Consolidated training period includedabove [i.e. as indicated in Annexure-VI1 and Annexure-VIII for O&M and Engineering] is indicative only. Employer reserves the right to reappropriate the training period between 0&M and Engineering depending upon the details of training moduie proposed by the Bidder.

28:02.00

Exact details, extent of training and the training schedule shall be finalized based on the Bidder's within two (2) months from placement of award.

The scope of services under training shall also necessarily include training of Employer's Engineering personnel covering a training module as. indicated in Annexure-ViI and Annexure-V111. This shall cover all disciplines and shall include all the related areas like design familiarization, training on product design features and product design software of major equipment and systems, engineering, manufacturing, erection, commissioning, training on operating features of ebuipment, quality assurance and testing, plant visits and visits to manufacturer's dbrks, exposure to various kinds of problems which may be encountered in fibrication, manufacturing erection, welding etc. An indicative module of the training requirement of Employer's Engineering personnel is attached as Annexure-VII and Ahnexure-VIII.

I SlNGRAULl STPP STAGE-Ill TECHNICAL SPECIFICATION Annexure-l to PAGE (IXSOQ MW) EPC PACKAGE SECTION; VI Amendment No. 02 to

PART4 Technical Speclflcntlons

144 of 314

NP-72

All the travelling expenses of the Employer's personnel to be trained including lodging and board~ng shall be borne by the Employer.

SECTION -VI Technical Specifications

..".

28 06.00 Take off prices (product wise) should be indicated by the Bidder in the Bid Proposal Sheets. Employer reserves the right to include or exclude these item(s) during placement of Award.

145 of 314

NP-73

CLAUSE NO.

I

ANNEXURE-VII to Part-C (GTR)

Area

D ~ C M I S - M ~ ~ .' M*c@jne

triterfap - , ::.:.: Hardware 8 Operating Sysiem

Topics / MANDAYS 1

DDGMIS- an Machine Intef ice System ~ ' n ~ l n j i e r i n ~ 8,

Apblicaiion SofWare

DDCMIS - Control System Hardware and Control system Application Sofhvare

training

dg ,

~ardware&.Sofiware organization of the system

Basis of selection of HMlmemory sizing

Operating system features, interface with other sys'tam, openness & inter- operabilit)

20

Upgmdeability

. System testing features

Tmuble shooting and fault analysis.

Specific system customisation . Various system modules & interface with OS

Database organisat~ion & development

Development of mimics

. Other application like calculations, logs historical storage functionallties & use

Trouble shooting and fault analysis.

Basic design features for system & its modules

Manufacturing processes with special attention to handling of the modules Maintenance facilities

System capabilities & system design techniques

System integration & System capabilities testing

Communication with MMI &other system --

Database structure Organisation 8 inter- face between application program & database

Application for implementationof Control fundions

e Study of standard algorithms & development of new algorithms

Trouble shooting and fault analysis.

20 + 100

20

DDCMIS- Operator Training

DDCMIS- Specialized Network sewnty

40

50

-- Use of the system at Works + at Slte

As per Annexure-VIII

SlNGRAULl STPP STAGE-Ill (1x600 M W EPC PACKAGE

Annexure-l to Amendment No. 02 lo

146 of 314

NP-74

9 1 6 3 9 I GENERAL TECHNICAL REQUIREMENTS 1 L

UPS system Theory & design features 2 Manufacturfngfassembly process

I I - Tesfing methodology - Trouble shoot~ng and fault analysis. - ....~

24 V DC system - Theory & design features Manufactur~nglassembly process

Trouble shooting and fault analysis

PA System Theory & design features 2

Trouble shoohng and fault analysis I

C C W System * Theory & design features 2 I I I I I /I Trouble shooting and fault analysis

QA SYSTEM Integrated QA Management system for 10 enhanced reliability of equipments.

. . . -. &

. .. i 9

PROGRAMME QA system in design, procurement, manufacturing, installation and operation of the equipmentsl systems

QA system for developing and establishiflg new processes and vendors. . System of structured documentatron of Engg and test records. . Appreciation of implementation of QA I Programme in various manufacturing, assembly apd testing activities. I- - Appreciation of develop-mental activities for new processes and vendors I

/ I

System of pre-qualificaUon of special processes

Controls & Familiarization with control system and 10 Instruments instrumentation I

CIA System for manufacture of reliable components. Manufacturing activities foricritical instrumentslitems.

. Implementation-of-testing programme to ensure reliability.. 6 ;I

Note One weekshall c,onstitute of five (5) man days. . . . . . 6 *

~, . .

SINGRAULI STPP STAGE-Ill Annexure-I to

147 of 314

NP-75

spEcmc ,zEb NENVORIZsEcU TdAiNINd ANNEXURE-VIiI . .

~tiefoll&ing ar6tGd diffe&t..fypes of training programs requited for the C&l ~ n ~ i n g e r s forming parf of lnfdimation ~kcbr i ty ~ e a m referred in Security &liciei& pi&cedures ( Appendix-A to sub-iectjon IllC-02).

e i f 6 4 0 CLAUSE NO.

* Security Overview lntroduction to Informatron Security Policy

Security Policy * Types of policies

Security Policy Implementation lntroduction to Networking

GENERAL 7,ECHNiCAL REQUIREMENTS

Chairman lntroduction to lnformation Security

- Network Components LAN, WAN ,

1 Internet, Intranet, Extranet Client-Sewer systems

lntroduction to Network Security

lnformation Security Manager & Information Security Coordinator lntroduction to lnformation Security

* Network Securrty Security Threats

lntroduction to Operating System Security

Operating systems security e Operating systems security

controls lntroduction to Database Securrty

Database security Database security controls

I Security Controls

I! 0 Firewalls - IDS

Security Overview

lntroduction to Networkrng * Network Components

LAN, WAN Internet. Intranet, Extranet

Client-Sewer systems Network Management

e Network Administration lntroduction to Network Security

Network Security = Security Threats

lntroduction to Operating System Security

E Operating systems security Operating systems security controls

lntroduction to Database Security

Database security Database security controls

Developing a Security Policy What is a Security Policy? Why isa Security Policy Important? . Setting Goals for an Effective Security Policy ldentifying the Assets to be Protected Identifying Security Risks Types of policies

0 Security Policy Implementation Security Controls

Firewalls r IDS

148 of 314

NP-76

JlXSUU MW) EPC PACKAGE

-

c;;'~:,

$ 'i

CLAUSE NO. GENERAL TECHNICAL REQUIREMENTS

, .

System Admihis@ator . , - . ..

introduction . . . . . . t o (rifpkation Security . . . . . . . . . . . . . . . . . , : >

* Security ?.v$i?/iw mt;oducti6ti'to &$**$Gng Ngmi;..e..'." . . . :... . ,:. ,. a@~unerits !&$:.,+AN: ..... ,.'~ ,,,..; ....

lnletnet'f@rb@et;-~xtranet . : , ., . ~ ? :. : .!;, .- CI~~~I~-S.F~N& &ems

Introduction t0~$0rk security Network $$&ority . ~&+irit~,~hi*?t&

Windows iiT00103 Introduction General-Windows 2060103 Architecture

* ~jbject-oriented hesign - h hi ArchitGcture of Windows System Information

ath her in^ the system information Tools to use

Physical Security BlOS, Screen Saver Physical access to the systems

Windows Security Policies Basic Guidelines Windows Security Policy Active Directory Group Policies

* Password Policy 0 Account lockout policy * Auditing

Managing and viewing event logs User Security

* ' Security Options * User ~ i ~ h t s 0 Local User and Group Accounts 0 Administrator Account Security - Group Membership & implications

Operating System Security * Versions of OS

Patches and Service Packs - , Checking for hot fixes and service packs

* File systems security -FAT & NTFS

. ~ - Access Control

Yerk &mini,siratgr lntfbd"ct;on . . . . . . . . . . . . . . . . . . . . . . . . . . . . tb Ngt&iGng .

Network Components LAN, \ivAfiJ . . .

~r&..fcet . .:Sat , anet,.~$mnet. ,. . . . . . . . . cfiej,t-s&wgr <$gteins ~. . : .. , ,:, . : , , , . -&&oik .~g@$&&&~t~ .. ,. , .

~ & j ~ f k ,&i$stratiob lntrodu6tion &.~k;&ork.S66urit~

NeWork. ~$&ul.ity Security ~k rea ts

Introduction ISO-OSI Layering. T~PIIP Layering.

* Internet-~ddresses. * The Domain Name System. * ~nca~sul&tion.

ClientLServer Model. Port Numbers. Standard, Simple Services

IP: Internet Protocol Introduction IP Header iP Routing

* Subnet ddressing R: Subnet ask * A Subnet Example

ifconfig Command * netstat Command

IP Futures UDP: User Datagram Protocol

* Introduction. UDP Header.

* UDP Checksum. * 1P Fragmentation.

TCP: Transmission Control Protocol. * TCP Services.

TCP Header. Firewall Concepts

What is a Firewall? . .

Types of Firewall Protection Multilayer Firewall Protection

.

. . . . . . . . . . . ". . , . >

f-d

. ,

. ,

*,

~. . , -,

,.

149 of 314

NP-77

Techniques used by viruses A&-virus & ~nti-virus strategies

,. < i i i

Screening router firewall Dual-Homed Host

0 Screened Host llS Settings (logging, home

0 Screened Subnet ACL on Virtual Directories Tools to enhance IIS web server

Demos and Exercises Application Proxies Database administrator Introduction to Information Security - lritrusion Detection Systems

Security Overview Understanding Packets and

Introduction to Networking Packet Filtering Devices that Perform Packet

. , Network Components

Internet, Intranet, Extranet Client-Server systems

Introduction to Network Security Network Security Setting Packet Filter Rules

* Security Threats Firewall ~dminisfration Adding Software Updates and

SQL Server Security

'I SQL Server Security Architecture Why Remote Management

* SQL Server accounts Tools are Important

,, ,. -. ',. * .\ y 150 of 314

NP-78

CLAUSE NO.

11643 GENERAL TECHNICAL REQUIREMENTS

. .

~atabasi5 &dmihistr&tor(6ofitd.) . . . . ~e.~*;k~d&ini.$ttat$r . ~ . . ~ fcontd.) ,

* sQL ................................ S&rver ~"thentic$ion 4..~ PiepLafing ~ $ ; $ & ~ e ~ & f l ~ .. ............ - ...

SQL Server Configuration @drarnet+~ * Watching for SuspiciouS Events

. . eai+b,:~eye~s ~llt&g$$&is~c&ty &+K~ ~errnissions on Stored Progedures * using-l.@

donfi$unngAclvanced irew wail Users and' Profiles ~(j"&i i jn~ ......

SQL SeFver Logins - Cha<ge:&nag@rnent * Users ail ov$rkechanisms - ~ k f a u l t database - ~ o a d &&&@ing - Windows users Filtering dbnfent

The sa.account Network devices Security Roles andPrivileges * S~ccuring switches k

* ~ i s t of koles Securing ~oute f f i - predefined roles - Privileges to Users and Roles GRANT options

Using the Built-in Auditing Tool Backups

. . . . . . . . . . . . . . . Demos and Exercises

151 of 314

NP-79

SI.NO. VOLUME / SECTION PAGE NO. CLAUSE NO. TECHNICAL SPECIFICATION Technical Queries NBPPL Clarifications

1 PE-TS-404-158-A001/Vol I/ Sec. C1/ Sub Sec. III SHEET 3 OF 43 8.0 Gravity Filter Datasheet -

Owing to the less flow (150 m3/hr) and based on our experience, we suggest to provide Pressurised Filters instead of Gravity filters. This will reduce the footprint as well.

Bidder to follow the Technical Secification.

2PE-TS-404-158-A001/Vol I/ Sec. C1/ Sub Sec. II/POWER CYCLE PIPING

SHEET 221 OF 1367 16.00.00 LP Chemical Dosing System Tender calls for Ammonia, hydrazine tanks & transfer pumps"

Request you to kinldy confirm whether these tanks & pumps are in bidder's scope or not. Also request you to kindly confirm whether SUB SECTION A-06 POWER CYCLE PIPING is applicalbe in bidder's scope of supply.

Bidder to refer the Scope of supply & services and excusions w.r.t the water treatment packages.

3 Drw no. PE-DG-404-158-A001 P&ID for PT Plant Tender calls for "Alum dosing in pretreatment line"

We understand from the drawing that, alum dosing shall be considered at the pretreatment section. Based on our experience, we suggest to dose FeCl3 in place of Alum Because, Aluminum shall carry over to the downstram RO membrane in RO-DM plant & it shall foul the membranes.Request you to kindly consider the above consideration. Kindly confirm whether we can design as per FeCl3.

Bidder to refer the Annexure‐II, Technical 

Amendments.

4Volume - I/Section - A

&Volume - I/Section - C

Sheet 2 OF 4&Sheet 3 OF 3

1.0 Scope- 1.1 Pretreatment & LET system&2.0 Exclusions

All civil construction works (except waste service water sump and pump house of LET system) including civil design is in bidder’s scope.& Exclusions - CIVIL & Structural work (Design & Construction) for following packages:-o RO-DM Planto Chlorination Planto CW Treatment Planto Condensate Polishing Unit.o Waste Service Water Sump & Pump House of LET Systemo Chemical Laboratory

We understand that, civil work for only PT & LET system are in Bidder's scope. However, we also understand that civil work for Waste service water sump & Pump house in LET system are excluded from bidder's scope. Kindly confirm our understanding is correct.

Bidder to follow the Technical Secification.

5 Volume - I/Section - C1/Sub Section: I SHEET 2 OF 71

1.0 SPECIFIC TECHNICAL REQUIREMENTS/1.1 PRE-TREATMENT PLANT & LIQUID EFFLUENT TREATMENT (LET) SYSTEM/ (vi)

Two (2) nos. High Recovery Solid Contact Type Clarifiers. We understand that, this is High Rate Solid Contact Clarifier. Kindly confirm our understanding is correct. Noted.

6 Volume - I/Section - C1/Sub Section: I SHEET 3 OF 71

1.0 SPECIFIC TECHNICAL REQUIREMENTS/1.1 PRE-TREATMENT PLANT & LIQUID EFFLUENT TREATMENT (LET) SYSTEM/ (xxxviii)

surface flow rate of cascade aerator shall be 0.03 m3/m2/hrAs per CPHEECO, we suggest that the surface loading can be considered upto 0.045 m3/m2/hr. Request you to kindly relook the same.

Bidder to follow the Technical Secification. 

7 Volume - I/Section - C1/Sub Section: I & III

SHEET 5 OF 71&SHEET 2 OF 43

1.1.2 OTHER DESIGN AND CONSTRUCTION FEATURES/1.1.2.3 CLARIFIERS&Technical Datasheets - 5.0 HRSCC (HIGH RECOVERY SOLID CONTACT CLARIFIER

The type of clarifier shall be solid contact reactor type&In the datasheets, it is given as High Rate Solids Contact Type Clarifier (HRSCC).

Request you to please confirm whether Reactor type clarifier is to be considered or High rate solid contact type clarifier is to be considered for design.

This is High Rate Solid Contact Clarifier.

8 Volume I/SECTION - C1/ SUB-SECTION: I & III SHEET 13 OF 71

1.2 RO-DM PLANT./ clause vi&Technical Datasheets -

One (1) no. UF Chemical Cleaning System consisting of 1 no. (1 x 100%) UF Chemical Cleaning Tank and 2 nos. (2 x 100%) UF Chemical Cleaning Dosing Pumps along with motor, piping, valves, fittings, instrumentation and associated accessories.

After reviewing the tender documents, we have found that, detail datasheet/specification is not provided for UF CIP System. Request you to provide the same.

Bidder to provide Cleaning system as per membrane 

supllier recommondation and system requirement meeting 

specification reuirement as minimum.

Annexure III - Technical Clarifications

NP-80

SI.NO. VOLUME / SECTION PAGE NO. CLAUSE NO. TECHNICAL SPECIFICATION Technical Queries NBPPL Clarifications

Annexure III - Technical Clarifications

9 Volume I/SECTION - C1/ SUB-SECTION: I & III SHEET 13 OF 71

1.2 RO-DM PLANT./ clause vii, viii, ix&Technical Datasheets -

Acid, Alkali, Hypo Dosing system is provided in the tender specification.

After reviewing the tender documents, we have found that, detail datasheet/specification for UF backwash chemical dosing system is not provided. Request you to provide the same.

Bidder to provide dosing system as per system requirement 

meeting specification reuirement as minimum.

10 Volume I/SECTION - C1/ SUB-SECTION: I & III SHEET 13 OF 71

1.2 RO-DM PLANT./ clause xxv. xxvi, xxvii&Technical Datasheets -

RO Stage II details

Based on our experience we suggest that, RO Stage I itself is sufficient to remove te TDS to achieve the desired outlet parameters. Hence RO Stage II is not required. Request you to please confirm whether we can design as per above

Bidder to follow the Technical Secification.

11 Volume I/SECTION - C1/ SUB-SECTION: I SHEET 24 OF 71 1.2 RO-DM PLANT./ 1.2.2.11.

MIXED BED EXCHANGE UNITS The DM Water generated from MB shall be stored in DM Water storage tank (not included in the DM plant package scope).

Request you to kindly confirm that DM water storage tank is not in Bidder's scope. Bidder to follow the Technical Secification.

12 Volume I/SECTION - C1/ SUB-SECTION: I SHEET 25 OF 71 1.2 RO-DM PLANT./ 1.2.2.13. DM

REGENERATION PUMPS

Two nos. (1W+1S) horizontal centrifugal DM regeneration pumps shall be provided to transfer water from DM water storage tank

We understand from above query (Sr. No 8), that DM water storage tank is not in Bidder's scope. Hence you are requested to kindly confirm whether only supply of pumps is in Bidder's scope or the entire piping from DM water storage tank is in Bidder's scope.

Bidder to follow the Technical Secification.

13 Drw no. PE-DG-404-158-A001 P&ID for PT Plant Tender calls for "Clarified Water Distribution Chamber"

We understand from the drawing that, Clarified Water distribution chamber is in NBPPL's scope, However, the LT on the chamber is in Bidder's scope.Request you to kindly confirm that our understanding is correct.

Bidder to follow the Technical Secification.

14 Drw no. PE-DG-404-164-A001 P&ID for LET Plant Tender calls for "Oil removal arrangement, skimmer (drum type) shall be provided by Bidder in Waste service water sump & pump house."

We understand that, the civil design & work of Waste service water sump & pump house is excluded from bidder's scope. However only the Oil Skimmer (drum type) shall be in Bidder's scope.Request you to kindly confirm that our understanding is correct.

Bidder to follow the Technical Secification.

15 Drw no. PE-DG-404-164-A001 P&ID for LET Plant Tender calls for "a tapping at the discharge of Treated Effluent disposal pumps for future use."

Request you to kindly share the size of the line & manual valve in the same line.

Bidder to refer the Annexure‐II, Technical 

Amendments.

16 PE-TS-404-158-A001/Vol I/ Sec. C1/ Sub Sec. I SHEET 4 OF 71 1.1.1. Design criteria & technical

details of PT & LET system

Tender calls for "The clarification Plant shall have 2 x 100% capacity Clarifiers. Design net capacity shall be 1600 m3/hr each clarifier."

Where as in technical datacheet " The design flow for Stilling chamber & Aerator is 3200 m3/hr"

After reviewing the tender documents, we have found that, there is a contradiction between the Mechanical Specific requirement & tender datasheet. We understand that "The clarification Plant shall have 2 x 50% capacity Clarifiers of capacity 1600 m3/hr each".Request you to kindly confirm that our understanding is correct.

Bidder to comply the technical specification. 

17 PE-TS-404-158-A001/Vol I/ Sec. C1/ Sub Sec. III SHEET 3 OF 43 8.0 Gravity Filter Datasheet Tender calls for "Filter flow rate at maximum flow rate not more than 5

m3/m2/hr"

After reviewing the tender, we understand that, Gravity filters are Dual media Type Gravity Filters. Based on our past experinces, we suggest for Dual media type gravity filters the surface flow rate 7.5 m3/m2/hr.Request you to please confirm whether we can design as per above.

Bidder to comply the technical specification only. 

18

PE-TS-404-158-A001/Vol I/ Sec. C1/ Sub Sec. I&PE-TS-404-158-A001/Vol. II/Sec XII

Sheet 1 of 43&Sheet 1 of 1

Specific Technical Requirement (Mech.)&NTPC Secification & Ammendments.

-

After reviewing the tender, we understand that, there are 2 specification viz. Specific Technical Requirement (Mech.) & NTPC Secification & Ammendments. Request yout to kindly confirm, which specification shall be considered for design

Bidder to refer Cl. No. 2.12 / Section A/ Vol. I of Technical Specification.

NP-81

SI.NO. VOLUME / SECTION PAGE NO. CLAUSE NO. TECHNICAL SPECIFICATION Technical Queries NBPPL Clarifications

Annexure III - Technical Clarifications

19

SUB SECTION-C-06&SECTION – C3/SUB-SECTION: I

SHEET 1 OF 17

1.02.04 & 1.03.04 Instrumentation and power supply cables&SPECIFIC TECHNICAL REQUIREMENTS (C&I)

Furnish, install and terminate and test all signal and prefabricated cables which interconnect between various equipment supplied by bidder including control cabinets, relay panel, vibration cabinets, CCTV, LVS, OWS, control panel etc.

Control cabinets, relay panel, vibration cabinets, CCTV, LVS, OWS, control panel, PA system etc mentioned in this clause is not in bidder's scope of supply as per the later document (SPECIFIC TECHNICAL REQUIREMENTS), please confirm our understanding is correct.

Bidder to refer C&I specification for scope related to C&I. 

20

SECTION – C3SUB-SECTION: II GENERAL TECHNICAL REQUIREMENTS (C&I)

SHEET 67 OF 75 Reference codes Annunciators Specifications and guides for the use of general purpose annunciators - ISAS 19.1, 1979.

Annunciator is not in bidder's scope. Please confirm our understanding is correct. Annunciators are not in Bidder's scope of supply.

21

SECTION – C3SUB-SECTION: II GENERAL TECHNICAL REQUIREMENTS (C&I)

SHEET 1 OF 4 2. CONTROL SYSTEM

The controls for complete Water Treatment package (Pre-Treatment plant, RO-DM Plant,Chlorination Plant, CW Treatment Plant, Condensate Polishing Unit, Liquid Effluent TreatmentSystem) shall be realized in DDCMIS based control system (not in bidder’s scope)

In order to estimate the cable rerouting, request you to please clarify the location of DDCMIS system. We would also request you to kindly provide the plant layout.

Please refer the latest plot plan (enclosed with Annexure-II, technical amendments) for Control room locations of various plants.

22

SECTION – C3SUB-SECTION: II GENERAL TECHNICAL REQUIREMENTS (C&I)

SHEET 1 OF 4 2. CONTROL SYSTEM

NBPPL shall provide 230V AC UPS & 24V DC supply at a single point. Bidder to include necessary power distribution board in its scope. Any other power supply than 230V AC/24VDC, if required by any instrument/device, has to be derived by the bidder from abovementioned feeders. All necessary hardware required for the same shall be in Bidder’s scope.

We understand that each plant like PT, RO-DM, CPU, ETP are located at different locations. Hence NBPPL will provide 230V AC UPS & 24V DC supply at each location. Please confirm our understanding is correct.

Normally,24V DC system shall be available near the respective Control rooms shown in the plot plan except CPU service vessel area. However, 230V AC UPS supply shall only be provided in Water system Control room.

23

SECTION – C3SUB-SECTION: II GENERAL TECHNICAL REQUIREMENTS (C&I)

SHEET 2 OF 4 2. CONTROL SYSTEMInterface of MCC, HT SWGR, field instruments, Control Valves, Solenoid Valves, Actuators etc. with DDCMIS based control system shall be as per Drive Control Philosophy.

As per ELECTRICAL SCOPE matrix, if both end equipment is in NBPPL’s scope then scope of cable is by NBPPL. MCC, HT SWGR and DDCMIS system is by NBPPL. Hence interfacing cables between MCC/HT SWGR and DDCMIS system is by NBPPL. Please confirm our understanding is correct.

Bidder to refer the technical specification. 

24 PE-TS-404-158-A001/Vol I/ Sec. C2/ Sub Sec. I SHEET 1 OF 1 LOCATION OF WATER TREATMENT

PACKAGES MCCsLOCATION OF WATER TREATMENT PACKAGES MCCs location is specified under this clause.

In the overall plot plan location of MCC room is not defined. Kindly specify the distance between various plant and its respective MCC room.

Bidder to follow the Technical Secification.

25 PE-TS-404-158-A001/Vol I/ Sec. C SHEET 3 OF 3 2.0 Exclusion Ventilation System is excluded from bidder's scope except for

Chlorination Plant

As per exclusion list, civil work (design and construction) for chlorination plant is not in bidder's scope. Hence, for estimation of ventilation kindly provide the room sizes for chlorination plant.

Bidder to follow the Technical Secification.

26

ANNEXURE – I TO SECTION – C : ELECTRICAL SCOPE BETWEEN NBPPL AND VENDOR

Page no: 360/1370 1.415V MCC

1. 415 V AC (3 phase, 4 wire) /240 V AC (1 phase, 2 wire) supply shall be provided by NBPPL based on load data provided by vendor at contract stage for all equipment supplied by vendor as part of contract including power supply equipment (battery charger etc) required for the PLC/control panel (as applicable) for the system supplied by vendor.

As per our understanding MCC Panel along with associated accessories,incoming Power and control cable is in NBPPL Scope.

Bidder to follow the Technical Secification.

27 Volume I/ SECTION C4 551 1.3 Tender calls for "Survey, site leveling & grading for complete stage-IV within plant boundary is bidder scope."

As site leveling grading is in bidder scope. Request you to please provide contour layout, NGL, FGL of stage -IV area

Levelled surface shall be provided at FGL by NBPPL.

28 Volume I/ SECTION C5 552 1.3 Tender calls for 'Rerouting and construction of drain / nallah diversion is in bidder scope."

Rerouting and construction of drain / nallah diversion is in bidder scope . Request you to kindly provide existing drain layout details .

Not in bidder's scope. Bidder to follow the technical specification.

29 Volume I/ SECTION C5 556 4.02 Tender calls for "Soil DataEmployer has carried out………..for main plant area and balance area."

Request you to please provide the soil report for deciding foundation of structures. Bidder to follow the Technical Secification.

NP-82

SI.NO. VOLUME / SECTION PAGE NO. CLAUSE NO. TECHNICAL SPECIFICATION Technical Queries NBPPL Clarifications

Annexure III - Technical Clarifications

30 General Site Greading After site visit we understood that Graded site will given to bidder . Please confirm our understanding is correct. Levelled surface shall be provided at FGL by NBPPL.

31 PE-TS-404-158-A001/Section C1/Subsection II

2.03.05 Technical requirement 155 of 1367 Tender calls for "Stainless steel to ASTM A-312 Gr.304 welded for sizes

above 50mm NB"

Request you to kinldy confirm whether we can consider sch 10 piping for the given MOC for sizes abvove 50mm NB for deminerlised water piping.

Bidder to note that Schedule 40 shall be probided by the bidder for Deminerlised Water Piping above 50 NB.

32 PE-TS-404-158-A001/ SECTION C1/ SUB-SECTION II

3.02.06 Technical requirement 240 of 1367 Tender specifies "ASTM D 3517 & ASTM D 4024 standard for GRP

pipes" Also GRP subvendor list has been provided in tender.Request you to please intimate the area of usage of GRP pipes. Bidder to follow the Technical Secification.

33 Volume I/SECTION - C1/ SUB-SECTION: I Pipe Racks

After reviewing the tender, we understand that the pipe racks for the entire plant (for all the packages) is in Client's scope. Request you to kindly confirm that our understanding is correct.

Bidder to follow the Technical Secification. 

NP-83


Recommended