APR1400-S-A-T(TM)-11006-N
APR1400 Safety Injection Tank -
Fluidic Device
Meeting Objective
Introduction
Fluidic Device
- Background of Fluidic Device Development
- Working Principles of Fluidic Device
- Performance Requirements of Fluidic Device
- Detailed Design of Safety Injection Tank
- Detailed Design of Fluidic Device
- Performance Verification Tests
- Topical Report Table of Contents
Summary
APR1400-S-A-T(TM)-11006-N
Meeting Objective
Provide a preview of the APR1400 Fluidic Device Topical Report, for its
submittal in the 3rd Qtr 2011
Purposes of Topical Report are
to support the review of Topical Report entitled, “CAREM for
LBLOCA Analysis of APR1400” (Fluidic Device is one of key
elements of APR1400 Safety Injection System)
to provide the design details and confirmatory test results of Fluidic
Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Introduction
Design Feature of APR1400
2 Loop / 4 Pump NSSS
SteamGenerator
Reactor CoolantPump Reactor Vessel
PressurizerIntegrated HeadAssembly
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APR1400-S-A-T(TM)-11006-N
Introduction
Design Feature of APR1400
Parameters APR1400
Thermal/ Electrical Power 4,000 MWt / 1,450 MWe
Seismic Acceleration 0.3 g
Operating Parameters
- Thot / Tcold 615 / 555 OF
- Operating Pressure 2250 psia
- RCS Flow Rate 1.66 x 106 lb/hr
- Main Steam Pressure (@Full Power) 1000 psia
- Main Steam Flow Rate 8.975 x 106 lb/hr
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
New Design Features of APR1400
Introduction
Evolutionary PWR – 1,400 MWe
2 Loop / 4 Pump NSSS
Improved from System 80+
SIS with Fluidic Device in Safety Injection Tank
Digital I&C
Advanced Control Room
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Introduction
Major Advanced Design Features of the Safety Injection
System for APR1400 :
4-Train Safety Injection System (SIS)
Direct Vessel Injection
In-containment Refueling Water Storage Tank (IRWST)
Safety Injection Tank with Fluidic Device (SIT-FD)
SIS design philosophy of the APR1400 is similar to that of
previously licensed PWR(System80+) by the NRC except for
the Fluidic Device in Safety Injection Tank
Safety Injection System
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
CONTAINMENT
SIT SIT
SIT SIT
S/G RV S/G
SIP
SIP
SIP
SIP
IRWSTRCP
RCP
RCP RCP
4 - Train Safety
Injection System
In-containment
Refueling Water
Storage Tank (IRWST)
Introduction
Safety Injection System
Safety Injection System configuration
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Introduction
Safety Injection Tank in LOCA
The role of Safety Injection Tank is to provide sufficient amount
of emergency core cooling(ECC) water in the early phase of
LBLOCA
to ensure core cooling and prevent possible core damage
in passive manner even before emergency power source
becomes available
Passive Fluidic Device has been adopted into APR1400 to
utilize excess water which might be spilled out through the
break
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Introduction
Fluidic Device Development
The design of Safety Injection Tank with Fluidic Device combines
known technology and operating experiences of a conventional
accumulator and passive fluidic device
⇒ Inherent reliability without any active movement
Safety Injection Tank with Fluidic Device provides sufficient margin
during early reflood phase of LBLOCA
Sufficient ECC water supply compensate for the effects of
downcomer boiling, ECC bypass, etc for best-estimate LBLOCA
analysis methodology
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Safety Injection Tank
with Fluidic Device
Core
Downcomer
Direct Vessel
Injection Nozzle
ColdLeg Hot
Leg
Direct Vessel Injection (DVI)
45 o
45
o
45
o45 o
180o0o
270o
90o
Introduction
Safety Injection System
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Introduction
Safety Injection System
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
ECC Flow Rate with time during LOCA
Fluidic Device
• Extends injection duration of Safety
Injection Tank
• Flow rate depends on the resistance of
supply port & control port
• Switchover from large flow rate to small
flow rate depends on the Stand Pipe
height
Fluidic Device
Background of Fluidic Device Development
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Fluidic Device
Working principles of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Typical Flow Pattern inside the Vortex Chamber
Large Flow Rate Small Flow Rate
Fluidic Device
Working principles of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Performance Requirements for Large Flow Injection
Large flow injection should continue until the end of
refill time
Lower plenum and downcomer should be filled with
water as rapidly as possible for early start of reflood
Time After Break
Flo
w R
ate
Blowdown & Refill Reflood
Large Flow Injection
Small Flow Injection
Large flow injection until the end of Refill period (minimum)
Fluidic Device
Performance Requirements of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Design Requirements for Large Flow Injection
Water Volume above the top of stand pipe
Resistance coefficient of large flow path
Requirements with margin were determined
based on the hypothetical LBLOCA analysis
The other parameters such as initial gas
pressure, gas volume, etc. were set based on the
experience earned from conventional plants
Fluidic Device
Performance Requirements of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Performance Requirements for Small Flow Injection
Downcomer water level should be maintained
Small flow rate should be large enough to maintain the
downcomer water level to keep the core reflood
condition
Downcomer water level should be maintained after refilling downcomer and lower plenum
Fluidic Device
Performance Requirements of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Design Requirements for Small Flow Injection
Minimum small flow rate to maintain downcomer
water level
Minimum small flow rate with margin was determined based on
the hypothetical LBLOCA analysis
Minimum small flow rate and injection duration are related to
SIP capacity
Time After Break
Flo
w R
ate
Reflood
Small Flow Injection
Minimum small flow rate to maintain downcomer water level
Fluidic Device
Performance Requirements of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Type Vertical
Design Pressure 4.83 MPa(g) (700 psig)
Operating Pressure 4.21 MPa(g) (610 psig)
Design Temperature 93.3 deg C (200 deg F)
Operating Temperature 48.9 deg C (120 deg F)
Total Internal Volume 68.14 m3 (2,406 ft3)
Normal Fluid Volume 52.61 m3 (1,858 ft3)
Minimum Fluid Volume above
the Top of the Stand Pipe22.65 m3 (800 ft3)
Safety Injection Tank Design Parameters
Fluidic Device
Detailed Design of Safety Injection Tank
Equipment Name ASME Sec. III Class
Seismic Category I Remark
Safety Injection Tank 2 I -
Fluidic Device 2 I -
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APR1400-S-A-T(TM)-11006-N
Discharge line isolation MOV is
controlled open to ensure availability during normal operation
removed from power to prevent inadvertent closure
during normal operation
provided with an auto-open and permissive close interlock
based on pressurizer pressure
Vent valves are locked closed, and power is removed during normal
operation
Two nitrogen supply valves are connected in series to prevent inadvertent
repressurization.
Provisions are made for sampling, filling, draining, and correcting boron
concentration
Fluidic Device
Detailed Design of Safety Injection Tank
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Fluidic Device
Detailed Design of Fluidic Device
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Fluidic Device
Detailed Design of Fluidic Device
Design commitment
Each Safety Injection Tank contains a Fluidic Device which regulates the
flow rate injected from the Safety Injection Tank
Test and Analysis
Injection test will be performed for as-built Safety Injection Tank with
Fluidic Device
Analysis will be performed to convert the test results from the test
conditions to the design conditions
Acceptance Criteria
The calculated resistance coefficient ranges of the as-built Safety
Injection Tank with Fluidic Device meet the requirements for
large flow and small flow condition
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Full scale test by Korea Atomic Energy Research Institute
(KAERI)
SIT
StockTank
AirCompressor
RecircluationPump
QuickOpening
Valve
Oriffice
StandPipe
SafetyValve
Vent
FluidicDevice
Fluidic Device
Performance Verification Tests
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Fluidic Device
1. INTRODUCTION
2. DEVELOPMENT PROGRAM OF FLUIDIC DEVICE
2.1 Background of the Fluidic Device Development
2.2 Working Principles of the Fluidic Device
2.3 Performance Requirements of the SIT-FD
3. DETAILED DESIGN OF THE SIT-FD
3.1 Safety Injection Tank
3.2 Fluidic Device
Topical Report Table of Contents
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APR1400-S-A-T(TM)-11006-N
4. PERFORMANCE VERIFICATION TEST
4.1 Test Facility
4.2 Test Conditions
4.3 Test Results
4.4 Uncertainty Evaluation
4.5 Quality Assurance Program
5. SUMMARY
Fluidic Device
Topical Report Table of Contents
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APR1400-S-A-T(TM)-11006-N
Summary
APR1400 Safety Injection Tank with Fluidic Device is
designed to meet the requirements for large and small
flow injection
Topical Report for Fluidic Device will be submitted in the
3rd Qtr 2011
SIT-Fluidic Device
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APR1400-S-A-T(TM)-11006-N
Thank you very much!!!
