ML17263A272

Rev 12 to EOP FR-H.1, Response to Loss of Secondary Heat Sink.

ML17263A272
Person / Time
Site:	Ginna
Issue date:	04/21/1993
From:	MARLOW T A ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A269	List: ML17263A268 ML17263A270 ML17263A271 ML17263A272 ML17263A273 ML17263A274 ML17263A275 ML17263A276
References
FR-H.1, NUDOCS 9305140051
Download: ML17263A272 (56)

Text

EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: PAGE 12 of 26 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW ATE 8<y PLANT SUPER T DENT FECTIVE DATE CATEGORY 1.0 REVIEWED BY: 9305140051 930505 PDR ADQCK 05000244'~F PDR 0

EOP: FR-H.l RESPONSE TO LOSS OF SECONDARY HEAT SINK REV'2 PAGE 2 of 26 A.PURPOSE-This procedure provides actions for responding

'to a loss of secondary heat sink in both S/Gs.B.ENTRY CONDITIONS/SYMPTOMS 1.ENTRY CONDITIONS

-This procedure is entered from: a.E-O, REACTOR TRIP OR SAFETY INJECTION, when minimum AFW flow is not verified AND normal range level in both S/Gs is less than 54[254 adverse CNMT]b.F-0.3, HEAT SINK Critical Safety Function Status Tree on a RED condition.

EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 3 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************

CAUTION o IF TOTAL FEED" FLOW IS LESS THAN 200 GPM DUE TO OPERATOR ACTION, THIS PROCEDURE SHOULD NOT BE PERFORMED.

o FEED FLOW SHOULD.NOT BE REESTABLISHED TO A FAULTED S/G IF A NON-FAULTED S/G IS AVAILABLE, NOTE: Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10+">R/hr.1 Check If Secondary Heat Sink Is Required: a.RCS pressure-GREATER THAN ANY NON-FAULTED S/G PRESSURE b.Check the following:

o RCS cold leg temperature-GREATER THAN 350'F o RCS pressure-GREATER THAN 400 psig[300 psig adverse CNMT]a.IF RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step l.IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.b.Try to place RHR System in service while continuing with this procedure:

1)Reset SI if necessary.

2)Place letdown pressure controller in MANUAL CLOSED.3)Check the following valves-OPEN'AOV-371, letdown isolation valve~AOV-427, loop B cold leg to REGEN Hx~At least one letdown orifice valve (AOV-200A, AOV-200B, or AOV-202)4)IF pressure on PI-135 less than 400 psig, THEN establish RHR normal cooling (Refer to Attachment RHR COOL).IF adequate cooling with RHR system established, THEN return to procedure and step in effect.

EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 4 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2 Monitor Secondary Heat Sink: o Verify either S/G level-WIDE RANGE GREATER THAN 35 inches[100 inches adverse CNMT]o Verify PRZR pressure-LESS THAN 2335 PSIG IF a loss of heat sink is indicated, THEN perform the following:

a.Trip both RCPs.b.Go to Step 13 to ini.tiate bleed and feed cooling.

EOP: FR-H-1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 5 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 3 Try to Establish AFW Flow To At Least One S/G: a.Check MCB indications for cause of AFW failure: 1)Verify CST level-GREATER THAN 5 FEET 2)Verify busses supplying power to MDAFW pumps-ENERGIZED~Bus 14~Bus 16 3)Check AFW valve alignment o AFW pump discharge valves OPEN~MOV-4007~MOV-4008~MOV-3996 o TDAFW pump flow control valves*-OPEN~AOV-4297~AOV-4298 b.Check AFW pumps-ALL RUNNING c.Check total flow to S/Gs GREATER THAN 200 GPM d.Return to procedure and step in effect 1)Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS.2)Continue attempts to restore power to MDAFW pumps.3)Dispatch AO to locally align valves, as necessary.

b.Perform the following:

1)Manually start MDAFW pumps.2)Check TDAFW pump steam supply valves OPEN.~MOV-3504A~MOV-3505A 3)If necessary dispatch AO to locally reset TDAFW pump governor valve.4)IF NO AFW pumps operable, THEN go to Step 4.c.Continue attempts to restore AFW flow and go to Step 4.

~N EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 6 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Stop Both RCPs*****************************************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.

5 Reset SI If Actuated

EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 7 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 6 Try To Establish MFW Flow To At Least One S/G: a.Check any MFW pump-AVAILABLE b.Check condensate system: o Condensate pump-ANY RUNNING o MFW pump suction pressure GREATER THAN 185 PSIG a.Go to Step 7.b.IF offsite power available, THEN try to place condensate system in service.IF NOT, THEN go to Step 7.c.Establish MFW flow: 1)Check.MFW pump discharge valves-CLOSED c.IF MFW flow can NOT be established, THEN go to Step 7.2)Verify MFW regulating or bypass valves-OPERABLE 3)Dispatch AO to restore MFW pump SW cooling 4)Verify S/G blowdown key switches in NORMAL 5)Ensure one MFW pump recirc valve-'OPEN 6)Start selected MFW pump 7)Open MFW pump discharge valve 8)Open MFW regulating or bypass valves as necessary to restore S/G level d.Go to Step ll

EOP: FR-HE 1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 8 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 7 Establish SAFW Flow: a.Perform the following:

1)Align SAFW system for operation (Refer to Attachment SAFW)a.IF greater than 200 gpm, total SAFW flow can NOT be established, THEN go to Step 8.2)Start both SAFW pumps 3)Verify SAFW total flow-GREATER THAN 200 GPM b.Go to Step ll*****************************************CAUTION IF WIDE RANGE LEVEL IN BOTH S/GS DECREASES TO LESS THAN 35 INCHES[100 INCHES ADVERSE CNMT]OR IF PRZR PRESSURE INCREASES TO GREATER THAN 2335 PSIG DUE TO LOSS OF HEAT SINK, THEN.STEPS 13 THROUGH 15 SHOULD BE IMMEDIATELY INITIATED FOR BLEED AND FEED.8 Establish Conditions to.Feed S/G(s)From Condensate System: a.Check condensate pumps-ANY RUNNING'.Establish condensate flowpath (Refer to Attachment COND to S/G)c.De-energize PRZR heaters a.IF offsite power available, THEN manually start at least one condensate pump.IF a condensate pump can NOT be started, THEN go to Step 12.

4~k EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 9 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 9 Establish Condenser Steam Dump Pressure Control: a.Verify condenser available:

o Any MSIV-OPEN o Annunciator G-15, STEAM DUMP ARMED-LIT a.Place S/G ARV controllers in AUTO at desired pressure and go to Step 10.b.Adjust condenser steam dump controller HC-484 to highest S/G pressure c.Verify condenser steam dump controller HC-484 in AUTO d.Place steam dump mode selector switch to MANUAL

'*h~t=.4,~

EOP: FR-H.1 TLTLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 10 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION FOLLOWING BLOCK OF AUTOMATIC SI ACTUATION, MANUAL SI ACTUATION MAY BE REQUIRED IF CONDITIONS DEGRADE.NOTE: If auxiliary spray is in use, spray flow may be increased by closing normal charging valve AOV-294 and normal PRZR spray valves.10 Establish Condensate Flow to S/G: a.Check RCS pressure-GREATER THAN 1950 PSIG b.Depressurize RCS to less than 1950 psig: 1)Check letdown-IN SERVICE 2)Depressurize using auxiliary spray valve (AOV-296)c.WHEN PRZR pressure less than 1950 psig, THEN place SI block switches to BLOCK~Train A~Train B d.Verify SAFETY INJECTION BLOCKED status light-LIT e.Manually open MFW flow control valves as desired f.Dump steam to condenser at maximum rate to depressurize at least one S/G to less than 380 psig g.Verify condensate flow to S/Gs a.Go to Step 10c.1)Use one PRZR PORV.IF IA to CNMT, AOV-5392, NOT open, THEN refer to Attachment N2 PORVS.IF PORV NOT available, THEN use auxiliary spray valve, AOV-296 and go to step 10c.2)Use one PRZR PORV.IF IA to CNMT, AOV-5392, NOT open, THEN refer to Attachment N2 PORVS.e.Manually open MFW flow control bypass valves.f.Manually or locally dump steam using intact S/G ARV.g.Go to Step 12.

EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 11 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION 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).11 Check S/G Levels: a.Narrow range level in at least one S/G-GREATER THAN 58[258 adverse CNMT]b.Return to procedure and step in effect a.IF feed flow verified and level increasing in at least one S/G, THEN maintain flow to restore narrow range level greater than 58[258 adverse CNMT]..IF NOT verified, THEN go to Step 12.12 Verify Secondary Heat Sink: a.Check the following:

o Either S/G level-WIDE RANGE GREATER THAN 35 inches[100 inches adverse CNMT]o PRZR pressure-LESS THAN 2335 PSIG b.Return to Step 1 a.IF loss of heat sink is indicated, THEN perform the following:

1)Trip both RCPs.2)Go to Step 13 to initiate bleed and feed cooling.

T t FR-HE 1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 12 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION STEPS 13 THROUGH 15 MUST BE PERFORMED QUICKLY IN ORDER TO ESTABLISH RCS HEAT REMOVAL BY RCS BLEED AND FEED.13 Actuate SI and CI*****************************************CAUTION WHEN BAST LEVEL DECREASES TO 10%, THEN SI PUMP AUTOMATIC SWITCHOVER TO RWST SHOULD BE ENSURED.14 Verify RCS Feed Path: a.Check SI pumps-AT LEAST ONE RUNNING b.Check valve alignment for operating SI pumps-PROPER EMERGENCY ALIGNMENT Manually start pumps and align valves as necessary to establish RCS feed path.IF a feed path can NOT be established, THEN continue attempts to establish feed flow.Return to Step 3.

EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 13 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 15 Establish RCS Bleed Path: a.Open both PRZR PORV block valves a.Ensure power to MCCs supplying block valves.~MCC C for MOV-515~MCC D for MOV-516 b.Place both PRZR PORV switches to OPEN IF any 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 c.Align RCS overpressure protection system to open both PRZR PORVs (Refer to Attachment N2 PORVS)d.Verify PORVs-BOTH OPEN d.IF BOTH PRZR PORVs can NOT be opened, THEN ensure both PORV switches in OPEN.

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EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 14 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************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.

16 Check If SI Can Be Reset: a.Check the following:

o PRZR pressure-LESS THAN 1750 PSIG-OR-o Either steamline pressure-LESS THAN 514 PSIG b.Reset SI a.IF PRZR pressure stable or increasing, THEN reset SI and go to.Step 17'F PRZR pressure decreasing, THEN perform the following:

1)WHEN PRZR pressure less than 1750 psig, THEN reset SI.2)Go to Step 17.17 Reset CI: a.Depress CI reset pushbutton b.Verify annunciator A-26, CONTAINMENT ISOLATION EXTINGUISHED b.Perform the following:

1)Reset SI.2)Depress CI reset pushbutton l" II l~4 t k 0~~

EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 15 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Verify Adequate SW Flow: a.Verify at least two SW pumps RUNNING b.Verify AUX BLDG SW isolation valves-AT LEAST ONE SET OPEN~MOV-4615 and MOV-4734~MOV-4616 and MOV-4735 a.Manually start pumps as power supply permits (258 kw each).IF less than two SW pumps can be operated, THEN go to Step 21.b.Establish SW to AUX BLDG (Refer to Attachment AUX BLDG SW).

I' EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 16 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 19 Establish IA to CNMT: a.Verify non-safeguards busses energized from offsite power o Bus 13 normal feed-CLOSED-OR-o Bus 15 normal feed-CLOSED b.Verify turbine building SW isolation valves-OPEN~MOV-4613 and MOV-4670~MOV-4614 and MOV-4664 c.Verify at least two air compressors

-RUNNING d: Check IA supply: o Pressure-GREATER THAN 60 PSIG o Pressure-STABLE OR INCREASING e.Reset both trains of XY relays for IA to CNMT AOV-5392 f.Verify IA to CNMT AOV-5392-OPEN a.Perform the following:

1)Close non-safeguards bus tie breakers:~Bus 13 to Bus 14 tie~Bus 15 to Bus 16 tie 2)Verify adequate emergency D/G capacity to run air compressors (75 kw each).IF NOT, THEN evaluate if CNMT RECIRC fans should be stopped (Refer to Attachment CNMT RECIRC FANS).3)WHEN bus 15 restored, THEN reset control room lighting.b.Manually align valves.c.Manually start air 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.Perform the following:

1)Continue attempts to restore IA (Refer to AP-IA.1, LOSS OF INSTRUMENT AIR).2)Continue with Step 21.WHEN IA restored, THEN do Steps 19e, f and 20.

e' EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 17 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 20 Restore RCS Overpressure Protection System To Standby: a.Verify instrument bus D-ENERGIZED a.Perform the following:

1)Ensure steam dump mode control in MANUAL.b.Place relief valve PC-431 and PC-430 arming switches to BLOCK~SOV-8619A~SOV-8619B 2)Restore power to instrument bus D from MCC B or MCC A (maintenance supply).c.Close SURGE TK VLVs~SOV-8616A~SOV-8616B NOTE: PRZR PORVs may close temporarily until adequate IA pressure is restored in CNMT.21 Verify Adequate RCS Bleed Patn: o Core exit T/Cs-STABLE OR DECREASING o Level (no RCPs)-GREATER THAN 68%'73%adverse CNMT]Perform the following:

a.Open Rx head vent valves.~SOV-590~SOV-591~SOV-592~SOV-593 b.Depressurize at least one intact S/G to atmospheric pressure using S/G ARV~c.Align any available low pressure water source to depressurized S/Gs.

EOP I FR-H.l TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 18 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION ACTIONS TAKEN TO INITIATE RCS FEED AND BLEED SHALL NOT BE REVERSED WHEN PERFORMING IMMEDIATE ACTIONS OF E-O, REACTOR TRIP OR SAFETY INJECTION.

22 Complete The Immediate Actions Of E-O, REACTOR TRIP OR SAFETY INJECTION, While Continuing With This Procedure CAUTION THE RCS BLEED PATH MUST BE MAINTAINED EVEN IF RCS PRESSURE REMAINS GREATER THAN SI PUMP SHUTOFF HEAD.23 Maintain RCS Heat Removal: o Maintain SI flow o Maintain both PRZR PORVs and block valves-OPEN 24 Check Normal Power Available To Charging Pumps: o Bus 14 normal feed breaker-CLOSED o Bus 16 normal feed breaker-CLOSED Verify adequate emergency D/G capacity to run charging pumps (75 kw each).IF NOT, THEN evaluate if CNMT RECIRC fans can be stopped (Refer to Attachment CNMT RECIRC FANS).

FR-H.1 TITLE: 'I RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 19 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 25 Check If Charging Flow Has Been Established:

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

1)IF CCW flow is lost to any RCP thermal barrier OR any RCP¹1 seal outlet temperature offscale 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 0%.b.Align charging pump suction to RWST: o LCV-112B-OPEN o LCV-112C-CLOSED b.IF LCV-112B can NOT be opened, THEN perform the following:

1)Verify charging pump A NOT running and place in PULL STOP.c.Start charging pumps as necessary and establish maximum charging flow 2)Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).3)WHEN V-358 open, THEN direct AO to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).

0 ll 1~>I EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 20 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION o IF RWST LEVEL DECREASES TO LESS THAN 28%, THEN THE SI SYSTEM SHOULD BE ALIGNED FOR COLD LEG RECIRCULATION USING STEPS 1 THROUGH 13 OF ES-1.3, TRANSFER TO COLD LEG RECIRCULATION.

o IF CONTAINMENT PRESSURE INCREASES TO GREATER THAN 28 PSIG, CONTAINMENT SPRAY SHOULD BE VERIFIED.o RHR PUMPS SHOULD NOT BE RUN LONGER THAN 1 HOUR WITHOUT CCW TO THE RHR HEAT EXCHANGERS.

26 Continue Attempts To Establish Secondary Heat Sink In At Least One S/G:~AFW flow~Main FW flow~Standby AFW flow~Condensate flow 27 Check For Adequate Secondary Heat Sink: a.Check narrow range level in at least one S/G-GREATER THAN 5%[25%adverse CNMT]b.Adjust S/G ARV controllers to existing S/G pressure a.Return to Step 26.

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EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 21 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION IF THE RCS IS WATER SOLID, THEN ANY INCREASE IN RCS TEMPERATURE MAY RESULT IN A SIGNIFICANT RCS PRESSURE INCREASE.RCS HEATUP SHOULD BE PREVENTED.

28 Monitor RCS Temperatures:

o Core exit T/Cs-DECREASING o RCS hot leg temperatures DECREASING Perform the following:

a.Control steam dump and feed flow to establish natural circulation and stabilize RCS temperature.

b.Return to Step 26.29 Check CCW Pumps-ANY RUNNING Perform the following:

a.IF any RCP¹1 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 b.Manually start one CCW pump (124 kw).30 Verify'Reactor Head Vent Valves-CLOSED Manually close valves.~SOV-590~SOV-591~SOV-592~SOV-593 I 4 EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 22 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED**************************%**************CAUTION IF RCS IS SOLID, THEN TERMINATION OF FEED AND BLEED MAY RESULT IN RAPID RCS.PRESSURE INCREASE UNLESS RCS INFLOW AND OUTFLOW ARE CAREFULLY CONTROLLED.

31 Check If One Of Three SI Pumps Should Be Stopped: a.Three SI pumps-RUNNING b.RCS subcooling based on core exit T/Cs-GREATER THAN 35'F[90'F adverse CNMT)USING FIGURE MIN SUBCOOLING c.Check PRZR level-GREATER THAN 13%[40%adverse CNMT]d.Stop one SI pump a.Go to Step 32.b.Check the following:

o RCS pressure greater than 1625 psig[1825 psig adverse CNMT)o RCS subcooling based on core exit T/Cs greater than O'using Figure MIN SUBCOOLING IF NOT, THEN go to Step 34'.Do NOT stop SI pump.Go to Step 34.,

C EOP: FR-H.l TITLEI RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 23 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 32 Check If One Of Two SI Pumps Should Be Stopped: a.Two.SI pumps-RUNNING b.'etermine required RCS subcooling from table: a.Go to Step 33.Charging PUIIlp Availability NONE ONE THREE RCS Subcooling Criteria 120'F[200'F adverse CNMT]115'F[190'F adverse CNMT].105'F[180'F adverse CNMT]100'F[175'F adverse CNMT]c.RCS subcooling based on core exit T/Cs-GREATER THAN VALUE FROM TABLE ABOVE USING FIGURE MIN SUBCOOLING d.PRZR level-GREATER THAN 13%[40%adverse CNMT]e.Stop one SI pump c.Check the following:

o RCS pressure greater than 1625 psig[1825 psig adverse CNMT]o RCS subcooling based on core exit T/Cs greater than O'using Figure MIN SUBCOOLING IF NOT, THEN go to Step 34.d.Do NOT stop SI pump.Go to Step 34.

EOP: FR-H.1 TITLE: RESPONSE TO LOSS.OF SECONDARY HEAT SINK REV: 12 PAGE 24 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 33 Check If Last SI Pump Should Be Stopped: a.One SI pump-RUNNING b.Check the following:

o RCS subcooling based on core exit T/Cs greater than O'using Figure MIN SUBCOOLING o RCS pressure greater than 1625 psig[1825 psig adverse CNMT)c.PRZR level-GREATER THAN 13%[40%adverse CNMT]d.Stop running SI pump e.Go to Step 36 a.Go to Step 36.b.Go to Step 34.c.Do NOT stop SI pump.Go to Step 34.NOTE: After closing a PORV, it may be necessary to wait for RCS pressure to increase to permit stopping SI pumps in SI reduction steps.34 Check PRZR PORVs And Associated Block Valves-ANY BLEED PATH OPEN Go to appropriate plant procedure:

o IF RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT.-OR-o IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION.

t EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 25 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION IF RCS IS SOLID, CLOSURE OF PORVS WILL RESULT IN RAPID RCS PRESSURE INCREASE UNLESS RCS INFLOW AND OUTFLOW ARE CAREFULLY CONTROLLED.

35 Isolate PRZR Bleed Paths: a.PRZR PORVs-BOTH OPEN b.Close one open PRZR PORV c.Return to Step 31 a.Perform the following:

1)Stop all but one charging pump~2)Control charging flow as necessary to maintain RCS pressure and PRZR level.3)Establish excess letdown as follows: o Place AOV-312 to NORMAL.o Ensure CCW pump running.o Manually open CCW from excess letdown Hx open (AOV-745).

o Open excess letdown isolation valve AOV-310.o Slowly open HCV-123.b.Close PORV block valve.IF block valve can NOT be closed, THEN go to appropriate plant procedure:

o IF RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT.-OR-o IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION.

A EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 26 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 36 Check PRZR PORVs-BOTH CLOSED Close both PRZR PORVs.IF any PRZR PORV"can NOT be closed, THEN manually close its block valve.37 Check If RHR Pumps Should Be Stopped: a.Check RCS pressure: 1)Pressure-GREATER THAN 250 psig[465 psig adverse CNMT]2)Pressure-STABLE OR INCREASING a.Go to appropriate plant procedure:

o IF RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step 1.'OR-b.Stop RHR pumps and place in AUTO o IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step 1.38 Start Charging Pumps As Necessary And Control Charging Flow To Maintain PRZR Level 39 Go To ES-1.1, SI TERMINATION'tep 8-END-

FOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 12 PAGE 1 of 1 FR-H.l APPENDIX LIST TITLE PAGES 1)FIGURE MIN SUBCOOLING 2)ATTACHMENT CNMT RECIRC FANS 3)ATTACHMENT COND TO S/G 4)ATTACHMENT N2 PORVS 5)ATTACHMENT SD-1 6)ATTACHMENT RHR COOL 7)ATTACHMENT SAFW 8)ATTACHMENT AUX BLDG SW

EOP: FR-H.1 T!TLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 12 PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE: Subcooling Margin=Saturation Temperature From Figure Below[-]Core Exit T/C Indication RC.2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 S PRESSURE (PSIG)RCS PRESSURE INCREHENTS 20 PSIG SUBCOOLED REGION ADVERSE CNHT NORHAL CNHT INADEQUATE SUBCOOLING REGION TEHPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEHPERATURE

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V V~'