ML17263A306

Rev 8 to FR-C.2, Response to Degraded Core Cooling.

ML17263A306
Person / Time
Site:	Ginna
Issue date:	05/19/1993
From:	Marlow T ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A305	List: ML17263A304 ML17263A306 ML17309A519
References
FR-C.2, NUDOCS 9306040165
Download: ML17263A306 (82)

Text

EOP:

REV 8 FR-C.2'ESPONSE TO DEGRADED CORE COOLING PAGE 1 of 15 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE Sich PLANT SUPERI TENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:

9'30b040165 930524

!

PDR ADQCK 05000244 roe

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REV: 8 FR-C. 2 RESPONSE TO DEGRADED CORE COOLING PAGE 2 of 15 A. PURPOSE This procedure provides actions to restore adequate core cooling.

B. ENTRY CONDITIONS/SYMPTOMS

l. ENTRY CONDITIONS - This procedure is entered from:

a. F-0.2, CORE COOLING Critical Safety Function Status Tree, on any ORANGE condition.

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REV: 8 FR-CD 2 RESPONSE TO DEGRADED CORE COOLING PAGE 3 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Adverse CNHT values should be used whenever CNMT ~ressure is greater than 4 psig or CNMT radiation is greater than 10+ R/hr.

1 Check RWST Level GREATER Perform the following:

THAN 284

a. Ensure SI system aligned for cold leg recirculation using Steps 1 through ll TRANSFER TO COLD LEG of ES-1.3, RECIRCULATION.

b. Go to Step 4.

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REV' FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 4 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2 Verify SI Pump And RHR Pump Emergency Alignment:

a. RHR pump discharge to Rx vessel a. Ensure at least one valve open.

deluge - OPEN

~ MOV-852A

~ MOV-852B

b. Verify SI pump C - RUNNING b. Manually start pump on available bus.

c. Verify SI pump A - RUNNING c. Perform the following;

1) Ensure SI pumps B and C running.

2) Ensure SI pump C aligned to discharge line A:

o MOV-871B closed o MOV-871A open

'3) Go to Step 3.

d. Verify SI pump B - RUNNING d. Perform the following:

1) Ensure SI pumps A and C running,

2) Ensure SI pump C aligned to discharge line B:

o MOV-871B open o MOV-871A closed

3) Go to Step 3.

e. Verify both SI pump C discharge e. Manually open valves as valves - OPEN necessary.

~ MOV-871A

~ MOV-871B.

EOP: T!TLE REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 5 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 3 Verify SI Pump Suction Alignment:

a. Check BAST level: a. Perform the following:

o Level - GREATER THAN 10% 1) Ensure at least one SI pump suction valve from RWST open.

o Annunciator B-23, BORIC ACID TANK LO LO LEVEL- ~ MOV-825A EXTINGUISHED ~ MOV-825B

2) Ensure at least one valve in each SI pump suction line from BAST closed.

~ MOV-826A or MOV-826B

~ MOV-826C or MOV-826D

3) Go to Step 4.

b. Verify SI pump suction valves b. Ensure both valves in either from BAST - OPEN flow path open.

~ MOV-826A o MOV-826A and MOV-826B

~ MOV-826B

~ MOV-826C -OR-

~ MOV-826D o MOV-826C and MOV-826D

c. Verify SI pump suction from RWST c. Manually align valves as CLOSED necessary.

~ MOV-825A

~ MOV-825B

' . 0' 'P

~ ~

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REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 6 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Verify SI Flow In Both Trains:

a. SI line loop A and B flow a. Perform the following:

indicators - CHECK FOR FLOW

1) Manually start SI pumps and align valves as necessary.

2) Establish maximum charging flow.

b. RCS pressure - LESS THAN b. Go to Step 5.

250 psig (465 psig adverse CNMT]

c. RHR loop flow indicator - CHECK c. Manually start RHR pumps and FOR FLOW align valves.

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REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 7 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• * * * * * * * * * * * * * *,* * * * * * * * * * * * * * * * * * * * * * * * *

• CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR PRESSURE, IT SHOULD BE CLOSED AFTER PRESSURE DECREASES TO LESS THAN 2335 PSIG (REFER TO STEP 5B).

5 Check RCS Vent Paths:

a. Power to PRZR PORV block valves a. Restore power to block valves

- AVAILABLE unless block valve was closed to isolate an open PORV:

~ MOV-515, MCC C position 6C

~ MOV-516, MCC D position 6C

b. PORVs - CLOSED b. IF PRZR pressure less than 2335 psig, THEN manually close PORVs.

IF any PORV can NOT be closed, THEN manually close its block valve.

c. Block valves - AT LEAST ONE OPEN c. Open one block valve unless it was closed to isolate an open PORV.

d. Rx vessel head vent valves d. Manually close valves.

CLOSED

~ SOV-590

~ SOV-591

~ SOV-592

~ SOV-593

EOP:

REV 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 8 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Normal conditions for running RCPs are desired, but RCPs should not be tripped if normal conditions cannot be established or maintained.

6 Check RCP Status:

a. At least one RCP - RUNNING a, Go to Step 9.

b. Support conditions for the b. Try to establish support operating RCP(s) available conditions for the operating RCP.

(Refer to Attachment RCP START) 7 Check RVLIS Fluid Fraction

a. Fluid fraction (any RCP on) a. IF increasing, THEN return to GREATER THAN 60% Step l.

IF NOT, then go to Step 8.

b. Return to procedure and step in effect.

8 Check Stopped:

If One RCP Should Be

a. Both RCPs - RUNNING a. Go to Step 10.

b. Stop one RCP

c. Go to Step 10

i

~ I'

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REV: 8 PR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 9 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 9 Check Core Cooling:

a. RVLIS level (no RCPs) - GREATER a. IF increasing, THEN return to THAN 43% [46% adverse CNMT] Step l. IF NOT, THEN go to Step 10.

b. Core exit T/Cs - LESS THAN 700'F b. IF decreasing, THEN return to Step 1. IF NOT, THEN go to Step 10.

c. Return to procedure and step in "

effect 10 'Check SI ACCUM Discharge IF SI ACCUM discharge valves closed Valves OPEN after ACCUM discharge, THEN go to Step 11. IF NOT, THEN perform the

~ MOV-841 following:

~ MOV-865

a. Dispatch AO with locked valve key to locally close breakers for SI ACCUM discharge valves.

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

b. Open SI ACCUM discharge valves.

~ ACCUM A, MOV-841

~ ACCUM B, MOV-865

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REV: 8 FR-C. 0 RESPONSE TO DEGRADED CORE COOLING PAGE 10 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION o IF CST LEVEL DECREASES TO LESS THAN 5 FEET, THEN ALTERNATE WATER SOURCES FOR AFW PUMPS WILL BE NECESSARY (REFER TO ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).

o A FAULTED OR RUPTURED S/G SHOULD NOT BE USED IN SUBSEQUENT STEPS UNLESS NO INTACT S/G IS AVAILABLE.

NOTE; TDAFW pump flow control valves fail open on loss of IA.

• 11 Monitor Intact S/G Levels:

l a.'arrow range level - GREATER a.= Increase total feed flow to THAN 5% [25% adverse CNMT] restore narrow range level greater than 5% [25% adverse CNMT] in at least one S/G.

b. Control feed flow to maintain narrow range level between 17%

[25% adverse CNMT] and 50%

12 Verify Condenser Steam Dump In Manual:

a. Verify condenser available: a. Place intact S/G ARV controller in MANUAL and go to Step 13, o Intact S/G MSIV - OPEN o Annunciator G-15, STEAM DUMP ARMED - LIT

b. Place steam dump mode selector switch in MANUAL

c. Place steam dump controller in MANUAL

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REV 8 PR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 11 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION THE FOLLOWING STEP WILL CAUSE SI ACCUMULATOR INJECTION WHICH MAY RESULT IN A RED PATH CONDITION IN F-0.4, INTEGRITY STATUS TREE. THIS PROCEDURE SHOULD BE COMPLETED BEFORE TRANSITION TO FR-P.1, RESPONSE TO IMMINENT PRESSURIZED THERMAL SHOCK.

13 Depressurize All Intact S/Gs To 200 PSIG:

a. Maintaincooldown rate in RCS cold legs - LESS THAN 100'F/HR

b. Dump steam to condenser b. Manually or locally dump steam from intact S/Gs:

o Use S/G ARVs.

-OR-o Open TDAFW pump steam supply valve(s) for affected S/G(s):

~ S/G A, MOV-3505A

~ S/G B) MOV-3504A

-OR-o Locally perform the following:

o Open intact S/G MSIV bypass valve.

o Open priming air ejector steam isolation valves.

~ V-3580

~ V-3581

c. Check S/G pressures - LESS THAN c. Return to Step 11.

200 PSIG

d. Stop S/G depressurization

EOP s REV' FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 12 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION RHR PUMPS SHOULD NOT BE RUN LONGER THAN 1 HOUR WITHOUT CCW TO THE RHR HEAT EXCHANGERS.

14 Check RHR Pumps RUNNING Manually start pumps as necessary.

15 Check If SI Isolated:

ACCUMs Should Be

a. RCS hot leg temperatures - BOTH a. Go to Step 17.

LESS THAN 400'F

b. Dispatch AO with locked valve key to locally close breakers for SI ACCUM discharge valves if necessary

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

c. Close SI ACCUM discharge valves c. Vent any unisolated ACCUMs:

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

d. Locally reopen breakers for MOV-841 and MOV-865

C EOP: TITLE:

REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 13 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

CAUTION SYMPTOMS FOR FR-C.1, RESPONSE TO INADEQUATE CORE COOLING, SHOULD BE CLOSELY MONITORED DURING SUBSEQUENT STEPS.

16 Stop All RCPs 17 Depressurize All Intact S/Gs To Atmospheric Pressure:

a. Maintain cooldown rate in RCS cold legs - LESS THAN 100'F/HR

b. Dump steam to condenser b. Manually or locally dump steam from intact S/Gs:

1) Use S/G ARVs.

2) Open TDAFW pump steam supply valve(s) for affected S/G(s):

~ S/G A, MOV-3505A

~ S/G B) MOV-3504A

3) Locally perform the following:

o Open intact S/G MSIV bypass valve.

o Open priming air ejector steam isolation valves.

~ V-3580

~ V-3581

FOP:

v ~

REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 14 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Verify SI Flow: Perform the following:

o SI line loop A and B flow a. Continue efforts to establish SI indicators - CHECK FOR FLOW flow.

-OR- b. Try to establish maximum charging flow.

o RHR loop flow indicator - CHECK FOR FLOW c. Return to Step 17.

19 Isolate Both SI ACCUMs:

a. Close SI ACCUM discharge valves a. Vent any unisolated ACCUMs:

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

b. Locally reopen breakers for MOV-841 and MOV-865 20 Stop All RCPs 21 Check Core Cooling: Return to Step 17.

o RVLIS level (no RCPs) - GREATER THAN 68% f73% adverse CNMT]

o Both RCS hot leg temperatures-LESS THAN 320'F

EOP:

REV 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 15 of 15 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 22 Go to Appropriate Plant Procedure

a. Check RWST level - GREATER THAN a. Go to ES-1.3, TRANSFER TO COLD 28'.

LEG RECIRCULATION, Step l.

Go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 17

-END-

EOP TITLE:

REV: 8 FR-C.2 RESPONSE TO DEGRADED CORE COOLING PAGE 1 of 1 FR-C.2 APPENDIX LIST TITLE PAGES

1) ATTACHMENT RCP START

r ~

8\

'

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t RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P. 1 SHOCK CONDITION PAGE 1 of 22 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATXON CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERXNTENDENT EFFECTXVE DATE CATEGORY 1.0 REVIEWED BY:

1 EOP: TITLE:

I REV: 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 2 of 22 A. PURPOSE This procedure provides actions -to avoid, or limit, thermal shock or pressurized thermal shock to the reactor pressure vessel, or overpressure conditions at low temperature.

B. ENTRY CONDITIONS/SYMPTOMS

1. ENTRY CONDITIONS This procedure is entered from:

a. F-0.4, INTEGRITY Critical Safety Function Status Tree, on either a RED or ORANGE condition.

e EOP:, TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P.1 SHOCK CONDITION PAGE 3 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNHT radiation is greater than 10+" R/hr.

1 Check RCS Pressure GREATER IF RHR flow greater than 475 gpm, THAN 250 PSIG [465 PSIG THEN return to procedure and step

~

adverse CNMT] in effect.

f EOP:

I TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P. 1 SHOCK CONDITION of II PAGE 4 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: A faulted S/G is any S/G that is depressurizing in an uncontrolled manner or is completely depressurized.

2 Check RCS Cold Leg Try to stop RCS cooldown:

Temperatures STABLE OR INCREASING a. Ensure S/G ARVs closed.

b. Close both S/G MSIVs.

c. Ensure MFW flow control valves closed.

+ MFW regulating valves

~ MFW bypass valves

d. Ensure MFW pumps tripped.

e. Rotate reheater steam supply controller cam to close reheater steam supply valves.

f. IF S/G pressure less than condensate pressure, THEN stop all condensate pumps.

g. IF RHR system in service, THEN stop any cooldown from RHR system.

h. Control total feed flow to non-faulted S/G(s) greater than 200 gpm until narrow range level greater than 5% [25% adverse CNMT] in at least one non-faulted S/G. WHEN S/G level greater than 5S [25% adverse CNMTJ in one non-faulted S/G, THEN limit feed flow to stop RCS cooldown.

This Step continued on the next page.

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REV 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 5 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED (Step 2 continued from previous page)

i. Minimize cooldown from faulted S/G(s):

1) Close faulted S/G(s) TDAFW pump steam supply valve(s).

~ S/G A, MOV-3505A

~ S/G B, MOV-3504A

2) IF both S/G(s) faulted, THEN control feed flow at 50 gpm to each S/G.

3) IF any S/G NOT faulted, THEN isolate all feedwater to faulted S/G unless necessary for RCS temperature control.

IF a faulted S/G is necessary for RCS temperature control, THEN control feed flow at 50 gpm to that S/G.

3 Check PRZR PORV Block Valves:

a. Power to PORV block valves a. Restore power to block valves AVAILABLE unless block valve was closed to isolate an open PORV:

~ MOV-515, MCC C position 6C

~ MOV-516, MCC D position 6C

b. Block valves - AT LEAST ONE OPEN b. Open one block valve unless it was closed to isolate an open PORV.

IF at least one block valve can NOT be opened, THEN dispatch AO to locally check breaker.

~ MOV-515, MCC C position 6C

~ MOV-516, MCC D position 6C

1 0

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I TITLE:

TO IMMINENT PRESSURIZED THERMAL REV 8

RESPONSE

FR-P. 1 SHOCK CONDITION PAGE 6 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• • %

• 4 ******************************CAUTION IF ANY PRZR PORV OPENS BECAUSE OF HIGH PRZR PRESSURE, THEN STEP 4 SHOULD BE PERFORMED AFTER PRESSURE DECREASES TO LESS THAN THE APPLICABLE PORV SETPOINT.

4 Check PRZR PORV Status:

a. Check Reactor Vessel a. Go to Step 4d.

Overpressure Protection System-IN SERVICE

b. Check RCS pressure - LESS THAN b. Perform the following:

410 PSIG l) Ensure at least one PRZR PORV open.

2) Continue with Step 5. WHEN pressure less than setpoint, THEN do Step 4e.

c. Go to Step 4e

d. PRZR pressure - LESS THAN d. Perform the following:

2335 PSIG

1) Ensure at least one PRZR PORV open.

2) Continue with Step 5. WHEN pressure less than setpoint, THEN do

'7 Step 4e.

e. Verify PRZR PORVs - CLOSED e. Manually close valve.

IF any val~e can NOT be closed, THEN manually close its block valve.

~ l > 1 ~ 1>>I' 8 EOP: TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P.1 SHOCK CONDITION PAGE 7 of 22 STEP . ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 5 Check SI Pumps ANY RUNNING Go to Step 14.

6 Check If SI Can Be Terminated: Do NOT following:

stop SI pumps'erform the o RCS subcooling based on core exit T/Cs - GREATER THAN 50'F a. IF RCS subcooling based on core USING FIGURE MIN SUBCOOLING exit T/Cs greater than O'F using Figure MIN SUBCOOLING and no RCP o Check RVLIS indication: running, THEN attempt to start an RCP:

o Level (no RCPs) - GREATER THAN 68% [73% adverse CNMTj 1) Establish conditions for starting an RCP:

-OR-

' Bus llA or 11B energized o Fluid fraction (any RCP running) - GREATER THAN 80% o Refer to Attachment RCP START

2) IF conditions established, THEN start one RCP.

b. Go to Step 27.

CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, THEN SELECTED SW PUMPS AND ONE CCW PUMP WILL AUTO START ON EMERGENCY D/G. MANUAL ACTION WILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

7 Reset SI

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I TITLE:

RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P.1 SHOCK CONDITION PAGE 8 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 8 Stop SI And RHR Pumps And Place In AUTO 9 Reset CI:

a. Depress CI reset pushbutton

b. Verify annunciator A-26, CNMT b. Perform the following:

ISOLATION - EXTINGUISHED

1) Reset SI.

2) Depress CI reset pushbutton.

10 Verify Adequate SW Flow:

a. Check at least two SW pumps a. Manually start SW pumps as power RUNNING supply permits (258 kw each).

IF less than two SW pumps running, THEN perform the following:

1) Ensure SW isolation.

2) Dispatch AO to establish normal shutdown alignment (Refer to Attachment SD-l).

3) Go to Step 12. WHEN adequate SW available, THEN do Step 11.

b. Dispatch AO to establish normal shutdown alignment {Refer to Attachment SD-1)

{a EOP: TITLE:

REV: 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P. 1 SHOCK CONDITION PAGE 9 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 11 Establish IA to CNMT:

a. Verify non-safeguards busses a. Perform the following:

energized from offsite power

1) Close non-safeguards bus tie o Bus 13 normal feed - CLOSED breakers:

-OR- ~ Bus 13 to Bus 14 tie' Bus 15 to Bus 16 tie o Bus 15 normal feed - CLOSED

2) Verify adequate emergency D/G capacity to run air compressors (75 kw each).

IF HQT, THEM evaluate RECIRC fans should be if CHHT stopped (Refer to Attachment CNMT RECIRC FANS).

3) WHEN bus 15 restored, THEN reset control room lighting.

b. Verify SW isolation valves to b. Manually align valves, turbine building - OPEN

~ MOV-4613 and MOV-4670

~ MOV-4614 and MOV-4664

c. Verify at least two air

- RUNNING

c. Manually start air compressors compressors as power supply permits (75 kw each). IF air compressors can NOT be started, THEN dispatch AO to locally reset compressors as necessary.

d. Check IA supply: d. Perform the following:

o Pressuxe - GREATER THAN 1) Continue attempts to restore 60 PSIG IA (Refer to AP-IA.1, LOSS OF IZISTRUMENT AIR).

o Pressure - STABLE OR INCREASING 2) Continue with Step 12. WHEN IA restored, THEN do Steps lie and f.

e. Reset both trains of XY relays for IA to CNMT AOV-5392

f. Verify IA to CNMT AOV-5392 - OPEN

l4 EOP: TITLE:

TO IMMINENT PRESSURIZED THERMAL REV: 8

RESPONSE

FR-P.1 SHOCK CONDITION PAGE 10 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• • • • • • • • • • • • • • • • • 4 ***********************

CAUTION ALIGNING SI PUMP SUCTION TO RWST BEFORE ISOLATING BAST MAY RESULT IN BACKFLOW

~

FROM RWST TO BASTS.

12 Verify SI Pump Suction Aligned To RWST:

a. SI pump suction valves from a. Ensure at least one valve in BASTs - CLOSED each flow path closed.

~ MOV-826A ~ MOV-826A or MOV-826B

~ MOV-826B ~ MOV-.826C or MOV-826D

~ MOV-826C

~ MOV-826D

b. SI pump suction valves from RWST b. Ensure at least one valve is OPEN open.

~ MOV-825A

~ MOV-825B

c. Consult TSC to determine flush is required (Refer to if SI Attachment SI FLUSH)

1 J EOP: TITLE%

REV 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 11 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 13 Check Been If Charging Established:

T Flow Has

a. Charging pumps - ANY RUNNING a. Perform the following:

1) IF CCW flow is lost to any RCP thermal barrier OR any RCP Pl seal outlet temperature of fscale high, THEN dispatch AO with key to RWST gate to locally close seal injection needle valve(s) to affected RCP:

~ RCP A, V-300A

~ RCP B> V-300B

2) Ensure HCV-142 open, demand at OS.

b. Align charging pump suction to b. IF LCV-112B can NOT be opened, RWST' THEN perform the following:

LCV-112B - OPEN 1) Verify charging pump A NOT running and place in. PULL o LCV-112C - CLOSED STOP.

2) Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).

3) WHEN V-3S8 open, THEN direct A'0 to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).

c. Start charging pumps as necessary and adjust charging flow to restore PRZR level

EOP: TITLE:

REV* 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 12 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• 14 Monitor SI Reinitiation Manually operate SI pumps as Criteria: necessary and perform the following:

o RCS subcooling based on core a. IF RCS subcooling based on core exit T/Cs - GREATER THAN FIGURE exit T/Cs greater than Figure MIN SUBCOOLING MIN SUBCOOLING and no RCP running, THEN attempt to start a o RVLIS indication: RCP:

o Level - GREATER THAN 68% [73% 1) Establish conditions for adverse CNMT] starting an RCP:

-OR- o Bus 11A or 11B energized o Fluid fraction (any RCP o Refer to Attachment RCP running) - GREATER THAN 80% START

2) IF conditions established, THEN start one RCP.

b. Go to Step 27.

15 Check RCS Hot Leg IF increasing, THEN control feed Temperatures STABLE flow and dump steam to stabilize RCS hot leg temperatures.

IF decreasing, THEN verify that actions of Step 2 have been performed before continuing with procedure.

0 t1

EOP:, T1TLE RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P.1 SHOCK CONDITION PAGE 13 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 16 Check If SI Isolated:

ACCUMs Should Be

a. Check the following: a. Return to Step 14.

o RCS subcooling based on core exit T/Cs - GREATER THAN O' USING FIGURE MIN SUBCOOLING o RVLIS indication:

o Level - GREATER THAN 68%

(73% adverse CNMT]

-OR-o Fluid fraction (any RCP running) - GREATER THAN 80%

b. Dispatch AO with locked valve key to locally close breakers for SI ACCUM discharge valves

~ MOV-841, MCC C position 12F

~ MOV-865, MCC D position 12C

c. Close SI ACCUM discharge valves c. Vent any unisolated ACCUMs:

~ MOV-841 1) Open vent valves for

~ MOV-865 unisolated SI ACCUMs.

~ ACCUM A, AOV-834A

~ ACCUM B, AOV-834B

2) Open HCV-945.

3) Continue with Step 17. Do NOT decrease RCS pressure to less than unisolated ACCUM pressure.

d. Locally reopen breakers for MOV-841 and MOV-865

EOP: TITLE:

TO IMMINENT PRESSURIZED THERMAL REV: 8

RESPONSE

FR-P.1 SHOCK CONDITION PAGE 14 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *'* * * * * *

• CAUTION THE RCS SHOULD NOT BE DEPRESSURIZED TO LESS THAN SI ACCUM PRESSURE UNTIL SI ACCUMS ISOLATED.

NOTE: o If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.

o When using a PRZR PORV select one with an operable block valve.

17 Depressurize RCS To Decrease RCS Subcooling:

a. Depressurize using normal PRZR a. IF normal spray NOT available, spray if available THEN use one PRZR PORV. IF IA NOT available, THEN refer to Attachment N2 PORVS.

IF no PRZR PORV available, THEN use auxiliary spray valve (AOV-296).

b. Depressurize RCS until either of the following conditions satisfied:

o RCS subcooling based on core exit T/Cs - LESS THAN 10'F USING FIGURE MIN SUBCOOLING

-OR-o PRZR level - GREATER THAN 87%

[75% adverse CNMT]

c. Stop RCS depressurization

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REV 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P. 1 SHOCK CONDITION PAGE 15 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Check If RCPs Must Be Stopped:

a. RCPs - ANY RUNNING a. Go to Step 19.

b. Check the following: b. Go to Step 19.

o RCP 41 seal D/P - LESS THAN 220 PSID

-OR-o RCP 51 seal leakoff - LESS THAN 0.25 GPM

c. Stop affected RCP(s)

• • • • • • • • • • • • • • • • • • • • • • 4 ******************

CAUTION AN INCREASE IN RCS PRESSURE MAY RESULT IN EXCESSIVE REACTOR VESSEL STRESS.

RCS PRESSURE AND TEMPERATURE SHOULD BE MAINTAINED STABLE WHILE PERFORMING SUBSEQUENT STEPS IN THIS PROCEDURE.

19 Check PRZR Level GREATER Try to restore level with charging THAN 134 [404 adverse CNMT] while maintaining stable RCS pressure. IF level can NOT be restored, THEN go to Step 26.

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FR-P. 1 SHOCK CONDITION PAGE 16 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Check Operation If NorInal CVCS Can Be Established

a. Verify IA restored: a. Continue with Step 24 'HEN IA restored, THEN do Steps 20 o IA to CNMT {AOV-5392) - OPEN through 23:

o IA pressure - GREATER THAN 60 PSIG

b. CCW pumps - ANY RUNNING b. Perform the following:

1) IF any RCP 51 seal outlet temperature offscale high, THEN isolate CCW to thermal barrier of affected RCP{s).

~ RCP A, MOV-749A and MOV-759A

~ RCP B, MOV-749B and MOV-759B

2) Manually start one CCW pump.

c. Verify instrument bus D- c. Energize MCC BE IF MCC B NOT ENERGIZED available, THEN perform the following:

1) Verify MCC A energized.

2) Place instrument bus D on maintenance supply.

d. Charging pump - ANY RUNNING d. Continue with Step 25. WHEN any charging pump running, THEN do Steps 21 through 25.

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FR-P.1 SHOCK CONDITION PAGE 17 o f 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED

• • • • • • % **********************************

CAUTION IF RCS PRESSURE LESS THAN 250 PSIG, THEN PCV-135 SHOULD BE ADJUSTED TO ESTABLISH DESIRED LETDOWN FLOW, NOT TO INCREASE PRESSURE.

I 21 Establish Normal Letdown: IF RCP seal return has been established, THEN establish excess

a. Establish charging line flow to letdown as follows:

REGEN Hx - GREATER THAN 20 GPM o Place excess letdown divert

b. Place the following switches to valve, AOV-312, to NORMAL.

CLOSE' o Ensure CCW from excess letdown Letdown orifice valves open, (AOV-745).

(AOV-200A, AOV-200B, and AOV-202) o Open excess letdown isolation

~ AOV-371, letdown isolation valve AOV-310.

valve

+ AOV-427, 1'oop B cold leg to o Slowly open HCV-123 to maintain REGEN Hx excess letdown temperature less than 195'F and pressure less

c. Place letdown controllers in than 100 psig.

MANUAL at 25% open o Ad)ust charging pump speed as

~ TCV-130 necessary.

~ PCV-135 IF RCP seal return NOT established,

d. Reset both for trains of XY relays THEN consult TSC to determine if AOV-371 and AOV-427 excess letdown should be placed in service.

e. Open AOV-371 and AOV-427

f. Open letdown orifice valves as necessary

g. Place TCV-130 in AUTO at 105'F

h. Place PCV-135 in AUTO at 250 psig

i. Adjust charging pump speed and HCV-142 as necessary

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0 RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P. 1 SHOCK CONDITION PAGE 18 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 22 Check VCT Makeup System:

a. BAST levels - ANY GREATER THAN 5% a. Go to. Step 23.

b. Check Annunicator B-23, BORIC b. Perform the following:

ACID TANK LO LO LEVEL-EXTINGUISHED 1) Adjust boric acid flow control valve to required flow from table.

BAST BORIC ACID LEVEL FLOW (GPM)

<10% 4.5 10-15% 6.7 15-208 8.9

>20% 10.0

2) Go to Step 22d.

c. Adjust, boric acid flow control valve in AUTO to 4.5 gpm

d. Verify the following'. d. Ad)ust controls as necessary.

1) RMW mode selector s~itch in AUTO

2) RMW control armed - RED LIGHT LIT

e. Check VCT level: e. Manually increase VCT makeup flow as follows:

o Level - GREATER THAN 20%

1) Ensure BA transfer pumps and

-OR- RMW pumps running. IF NOT, THEN reset MCC C and MCC D UV o Level - STABLE OR INCREASING lockouts as necessary.

2) Place RMW flow control valve HCV-111 in MANUAL and increase RMW flow.

3) Increase boric acid flow as necessary.

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REV: 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL PR-P. 1 SHOCK CONDITION PAGE 19 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 23 Check Charging Pump Suction Aligned To VCT:

a. VCT level - GREATER THAN 20% a. IF VCT level can NOT be maintained greater than 5%, THEN perform the following:

1) Ensure charging pump suction aligned to RWST o LCV-112B open o LCV-112C closed

2) Continue with Step 24. WHEN VCT level greater than 408, THEN do Step 23b.

b. Verify charging pumps aligned to b. Hanually align valves as VCT necessary.

o LCU-112C - OPEN o LCV-112B - CLOSED 24 Check PRZR Level LESS THAN Control charging and letdown as 874 [754 adverse CNMT] necessary to reduce PRZR level to less than 87% I75% adverse CNMT].

If necessary establish excess letdown.

IF no letdown available AND CCW to RCPs established, THEN cycle charging pumps as necessary to control PRZR level.

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FR-P.1 SHOCK CONDITION PAGE 20 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: For optimum long term pressure control, saturated conditions should be restored in the PRZR.

25 Verify PRZR Liquid AT IF PRZR liquid temperature low, Temperature (TI-424) THEN energize PRZR heaters as SATURATION FOR DESIRED necessary to establish desired PRESSURE temperature.

26 Check RCS Subcooling Based On IF RCS pressure less than 160 psig Core Exit T/Cs BETWEEN O' f200 psig adverse CNMT], THEN go to AND 10'F USING FIGURE MIN Step 27. IF NOT, THEN depressurize SUBCOOLING using normal spray.

IF normal spray NOT available and letdown is in service, THEN use, auxiliary spray for any further depressurization. Return to Step 17b.

IF auxiliary spray NOT available, THEN return to Step 17a.

27 Check Cool Down Rate In RCS Return to procedure and step in Cold Legs GREATER THAN effect.

100'F IN ANY 60 MINUTES PERIOD 28 Maintain RCS Pressure And Temperature Stable For At Least 1 Hour

a. Control steam dump and feed flow as necessary

b. Perform actions of other procedures in effect which do not cool down the RCS or increase RCS pressure until the RCS temperature soak has been completed

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FR-P.1 SHOCK CONDITION PAGE 21 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 29 WHEN 1 HOUR Soak Is Complete, THEN Continue RCS Cooldown And Depressurization As Necessary

a. Maintain RCS pressure and cold leg temperature within the limits of Figure SOAK LIMITS

b. Establish and maintain cooldown rate in RCS cold legs - LESS THAN 50'F IN ANY 60 MINUTES PERIOD 30 Verify SI Flow Not Required: Manually operate SI pumps as necessary.

o RCS subcooling based on core exit T/Cs - GREATER THAN FIGURE IF RCS subcooling based on core MIN SUBCOOLING exit T/Cs greater than Figure MIN SUBCOOLING and no RCP running, THEN o RVLIS vindication: perform the following:

o Level - GREATER THAN 68% [73% a. Establish conditions for adverse CNMT] starting an RCP:

-OR- o Bus 11A or llB energized o Fluid fraction (any RCP o Refer to Attachment RCP START running) - GREATER THAN 80$

b. IF conditions established, THEN start one RCP.

1 IV y

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RESPONSE TO IMMINENT PRESSURIZED THERMAL REV: 8 FR-P. 1 SHOCK CONDITION PAGE 22 of 22 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 31 Return To Procedure And Step In Effect

-END-

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REV: 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 1 of 1 FR-P.1 APPENDIX LIST TITLE PAGES

1) FIGURE MIN SUBCOOLING

2) FIGURE SOAK LIMITS

3) ATTACHMENT RCP START

4) ATTACHMENT SD-1

5) ATTACHMENT CNMT RECIRC FANS

6) ATTACHMENT N2 PORVS

7) ATTACHMENT SI FLUSH

~V EOP: TITLE:

REV: 8 RESPONSE TO IMMINENT PRESSURIZED THERMAL FR-P.1 SHOCK CONDITION PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE: Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication RC S PRESSURE (PSIG) 2500 2400 RCS PRESSURE 2300 INCREHENTS 20 PSIG 2200 2100 2000 1900 1800.

1700 1600 1500 SUBCOOLED 1300 REGION 1200 1100 1000 900 800 700 INADE(UATE SUBCOOL ING 600 ADVERSE CNHT REGION 500 400 300 200 NORHAL CNHT TEMPERATURE INCREHENTS 10'F 100 0

200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE ('F) 0

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FR-P. 1 SHOCK CONDITION PAGE 1 of 1 FIGURE SOAK LIMITS RCS PRESSURE (PSIG) 2500

-

2400 RCS PRESSURE 2300 INCREMENTS 20 PSIG 2200 2100 2000 1900 ISOO 1700 1600 1500 1400 REMAIN 1300 BELOW 1200 CURVE 1100 1000 900 800 700 600 500 400 300 200 TEMPERATURE INCREMENTS 10'F 100 0

200 250 300 350 400 450 500 550 600 650 700 RCS COLD LEG TEMPERATURE ('F)

1

,

't

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