Application of the Performance Validation Tool for the ...

2009 IAEA Conference

Application of the Performance Validation Tool for the Evaluation of NSSS Control System Performance

Sohn Suk-Whun

2009. 10. 29


2

4

Test Results

Conclusion

1 Pre-Op Dynamic Test


3 Pre-PAT Dynamic Test


Pre-Op Dynamic Test1



OPR1000 NSSS Control System

Composition

Dormant error can cause the reactor trip.

Experience : YGN 5&6 Startup Period (Changed Hardware)

SG Press. ControlTBV

SBCS

SG Level ControlDFWCV, EFWCV,MFWP Speed

FWCS

Rapid Rx Power ReductionCEA Group 5 or 4+5, TCV

RPCS

TAVG ControlCEA Group

RRS

PZR Level ControlCharging Valve,Letdown Isolation Valve

PLCS

PZR Press. ControlSpray Valve, Heaters

PPCS

• OPR1000 : Optimized Power Reactor 1000MW

• NSSS : Nuclear Steam Supply System

• SBCS : Steam Bypass Control System

• FWCS : Feedwater Control System

• RRS : Reactor Regulating System

• PPCS : Preaaurizer Pressure Control System

• PLCS : Pressurizer Level Control System


Tests during Startup

CommercialOperation

Pre-OpTest

FAT

Design/Fabrication

PAT

Dynamic Test

Static Test

(Plant Site)

Static Test

(Factory)

• FAT : Factory Acceptance Test

• Pre-op : Pre-operational

• PAT : Power Ascension Test

(V&V Methodology)

NPPs under Construction We experienced a reactor trip in this stage due

to an error in control system caused by

programmer’s oversight (YGN 5&6)


Tests (Hardware Replacement)

CommercialOperation

Pre-OpTest

FAT

Design/Fabrication

Dynamic Test

Static Test

(Plant Site)

Static Test

(Factory)




(V&V Methodology)

Operating NPPs

Pre-op Dynamic

Test

• Potential Risk of Real Plant Testing

• Economical Loss : Reduction

of Electricity Production

Skip Power Ascension Test


Synopsis of Pre-op Dynamic Test

Design Spec.

Old Control System Hardware

Computer Code (Win-NPA) Modeling

New Control System Hardware

PAT Simulation

PAT Simulation

PAT Simulation

PerformanceValidation Test

OperabilityTest

Hardware Functional Test

Design Spec.



PAT Simulation

PAT Simulation




Performance Validation Test

(Control System)SensorSignal

Component ControlSignal

Computer Code Modeling of Control System

according to Design Spec.

After bypass its own control system,

it connect with replaced H/W

Compare the results


Synopsis of Pre-op Dynamic Test

Design Spec.




PAT Simulation

PAT Simulation

PAT Simulation


OperabilityTest


Design Spec.


New Control System Hardware PAT Simulation

PAT Simulation

OperabilityTest



Operability Test





Compare the results


Configuration of Test Equipment

Signal Interface Module


Test Results2



Selection of Test Cases

• Load Rejection to House Load

• Loss of a Main Feedwater Pump

• Reactor Trip

• Turbine Power 10% Step Decrease (100 to 90%)

• Turbine Power 5%/min Ramp Decrease (100 to 30%)

• Valve Transfer (Increasing Direction, 20%)

• Valve Transfer (Decreasing Direction, 18%)


YGN 3&4 Test Result (1/6)

Load Rejection to House Load (Performance Validation Test)

0 100 200 300 400 500 6000

10

20

30

40

50

60

70

80

90

100

SG 1

NR

Leve

l, %

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6000

20

40

60

80

100

FW1

Flow

DP,

%

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6000

20

40

60

80

100

SG 1

Ste

am F

low

DP, %

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6001060

1080

1100

1120

1140

1160

1180

1200

1220

1240

SG 1

pre

ssur

e, p

sia

Time, seconds

Win-NPA Win-NPA+H/W


0 100 200 300 400 500 6000

20

40

60

80

100

FOXBORO (Old) TRICONEX (New)

FW1

Flow

DP,

%

Time, seconds

0 100 200 300 400 500 6001060

1080

1100

1120

1140

1160

1180

1200

1220

1240


SG 1

pre

ssur

e, p

sia

Time, seconds

Load Rejection to House Load (Operability Test)

0 100 200 300 400 500 6000

10

20

30

40

50

60

70

80

90

100


SG 1

NR

Leve

l, %

Time, seconds

0 100 200 300 400 500 6000

20

40

60

80

100


SG 1

Ste

am F

low

DP, %

Time, seconds




Loss of a Main Feedwater Pump (Performance Validation Test)

0 100 200 300 400 500 6000

10

20

30

40

50

60

70

80

90

100

SG 1

NR

Leve

l, %

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6000

20

40

60

80

100

FW1

Flow

DP,

%

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6000

20

40

60

80

100

SG 1

Ste

am F

low

DP, %

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 6001040

1060

1080

1100

1120

1140

1160

SG 1

pre

ssur

e, p

sia

Time, seconds

Win-NPA Win-NPA+H/W


Loss of a Main Feedwater Pump (Operability Test)


0 100 200 300 400 500 6000

20

40

60

80

100


FW1

Flow

DP,

%

Time, seconds0 100 200 300 400 500 600

0

20

40

60

80

100


SG 1

NR

Leve

l, %

Time, seconds

0 100 200 300 400 500 6000

20

40

60

80

100


SG 1

Ste

am F

low

DP, %

Time, seconds0 100 200 300 400 500 600

1040

1060

1080

1100

1120

1140

1160 FOXBORO (Old) TRICONEX (New)

SG 1

pre

ssur

e, p

sia

Time, seconds


Reactor Trip (Fail Case) : PI Controller Option Related Error

0 200 400 600 800 10000

20

40

60

80

100

SG 1

NR

Leve

l, %

Time, seconds

Win-NPA Win-NPA+H/W

0 100 200 300 400 500 600-10

0

10

20

30

40

50

60

70

DFW

CV 1

Pos

ition

Dem

and,

%

Time, seconds

Win-NPA Win-NPA+H/W

0 200 400 600 800 10000

20

40

60

80

100

FW1

Flow

DP,

%

Time, seconds

Win-NPA Win-NPA+H/W

0 50 100 150 2000

2

4

6

8

10

FW1

Flow

DP,

%

Time, seconds

Win-NPA Win-NPA+H/W

Enlargement



Reactor Trip (Success Case)

0 200 400 600 8000

20

40

60

80

100

SG 1

NR

Leve

l, %

Time, seconds

Win-NPA Win-NPA+H/W

0 200 400 600 8000

20

40

60

80

100

DFW

CV 1

Pos

ition

Dem

and,

%

Time, seconds

Win-NPA Win-NPA+H/W

0 200 400 600 800 1000540

550

560

570

580

590

600

Aver

age

Tem

pera

ture

, Deg

.F

Time, seconds

Win-NPA Win-NPA+H/W

0 200 400 600 800 10002000

2050

2100

2150

2200

2250

2300

Pres

suriz

er P

ress

ure,

psia

Time, seconds

Win-NPA Win-NPA+H/W



Pre-PAT Dynamic Test3



Suggest of Pre-PAT Dynamic Test

CommercialOperation

Pre-OpTest

FAT

Design/Fabrication

PAT

Dynamic Test

Static Test

(Plant Site)

Static Test

(Factory)




(V&V Methodology)

NPPs under ConstructionPre-PAT Dynamic

Test


Individual Test including Component

PC

Feedwater

SteamGenerator

2

20" 18"20"16"

12"8"

6"

HO HO

MainSteam

SteamGenerator

1

RCS(cold) RCS(hot)

MPC

M

Chemical Injection

8"8"HO HO

AFW

6"

PC

FWCS

Reactor Power

Speed D

emand

MFWPs

Isolation

BOP PCS

Rx Pow

er

SG

Level

Stm Flow

FW Flow

• BOP : Balance of Plant

• PCS : Plant Computer System



A/D

DAQ

D/A

Integrated Test

SG Level

FW Flow

Stm Flow

MFWP Speed Demand

Arm, Drop

FWCS

SBCS

PPCS

PLCS

RRS

RPCS

DFWCV

EFWCV

TBV

Spray Valve

CCV

Permissive

Quick Open

Modulation

TLI

Hot Leg Temp.

Cold Leg Temp.

Rx Power

PZR Press.

Stm HDR Press.

PZR Level

TBN Load Increase Inhibit

TBN Setback

TBN Runback

AMI, AWP

AMI, AWP

CEA Direction, Rate

TCS

CEDMCS


• SBCS : Steam Bypass Control System

• PPCS : Pressurizer Pressure Control System

• PLCS : Pressurizer Level Control System

• RRS : Reactor Regulating System

• RPCS : Reactor Power Cutback System

• TCS : Turbine Control System

• DFWCV : Downcomer Feedwater Control Valve

• EFWCV : Economizer Feedwater Control Valve

• TBV : Turbine Bypass Valve

• AMI : Automatic Motion Inhibit

• AWP : Automatic Withdrawal Prohibit


Conclusion4



Conclusion

• We develop the new tool to validate the performance of control and monitoring system.

• The tool showed a greater performance than expected.(We found the lots of error during YGN 3&4 Project)

• We try to expand the scope of tool to the NPPs under construction. (Pre-PAT Dynamic Test)

• We changed the name of our engineering simulator from win-NPA to N-Fast.

NSSSFast Analysis andSimulat ionTool

-FAST


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