ML17262A543: Difference between revisions

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1)Ensure steam dump mode control in MANUAL.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"lose temporarily until adequate IA pressure is restored in CNMT.20 Verify Adequate RCS Bleed Path-BOTH PRZR PORVS OPEN IR PRZR PORVs can NOT be opened, THEN perform the following:
1)Ensure steam dump mode control in MANUAL.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"lose temporarily until adequate IA pressure is restored in CNMT.20 Verify Adequate RCS Bleed Path-BOTH PRZR PORVS OPEN IR PRZR PORVs can NOT be opened, THEN perform the following:
a.Open Rx vessel head vents.~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 the depressurized S/Gs.
a.Open Rx vessel head vents.~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 the depressurized S/Gs.
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(~EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 17 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION THE RCS BLEED PATH MUST BE MAINTAINED EVEN IF RCS PRESSURE REMAINS GREATER THAN SI PUMP SHUTOFF HEAD.~N*********~***********~*****************21 Maintain RCS Heat Removal: o Maintain SI flow o Maintain both PRZR PORVs and block valves-OPEN 22 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).
(~EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 17 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION THE RCS BLEED PATH MUST BE MAINTAINED EVEN IF RCS PRESSURE REMAINS GREATER THAN SI PUMP SHUTOFF HEAD.~N*********~***********~*****************21 Maintain RCS Heat Removal: o Maintain SI flow o Maintain both PRZR PORVs and block valves-OPEN 22 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).
A EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 18 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2F Cheek If Charging Flow Hae Been Established:
A EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 18 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2F Cheek If Charging Flow Hae Been Established:

Revision as of 13:19, 26 April 2019

Rev 10 to EOP FR-H.1, Response to Loss of Secondary Heat Sink.
ML17262A543
Person / Time
Site: Ginna Constellation icon.png
Issue date: 06/14/1991
From: WIDAY J A
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17262A536 List:
References
FR-H.1, NUDOCS 9107110296
Download: ML17262A543 (56)


Text

c,~~EOP: F@-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 1 of 26 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION'CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERINTEND NT C'EF ECT E DATE CATEGORY 1.0 REVIEWED BY: 91,07110296 910619 PDR ADOCK 05000244 F PDR CW~~4*N~eV$

EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 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.b.F-0.3, HEAT SINK Critical Safety Function Status Tree on a RED condition.

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EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 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 28X, THEN go to E-l, LOSS OF REACTOR OR, SECONDARY COOLANT, Step l.IF RWST level less than 28X, 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 tEan 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.

~~C EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 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 Ip a loss of heat sink is indicated, THEN perform the folloving:

a.Trip both RCPs.b.Go to Step 12 to initiate bleed and feed cooling.

Il ei+4 vt if, Wei8 i~A EOP: FR-H.1 T!TLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 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 MDAFV pumps-ENERGIZED~Bus 14~Bus 16 3)Check AFV 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 AFV 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-AFV.1, ALTERNATE WATER SUPPLY TO AFV 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.c.Continue attempts to restore AFW flow and go to Step 4.

~~

EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 6 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Stop Both RCPs

~r I EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 7 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, SELECTED SW PUMPS AND ONE CCW PUMP VILL AUTO START ON EMERGENCY D/G.MANUAL ACTION VILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

5 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 MFV pump suction pressure-GREATER THAN 185 PSIG c.Reset SI if necessary d.Establish MFW flow: 1)Check MFW pump discharge valves-CLOSED 2)Verify MFW flow control bypass valve-OPERABLE 3)Dispatch AO to restore MFV pump SV cooling 4)Verify S/G blowdown key switches in NORMAL 5)Ensure one MFV pump recirc valve-OPEN 6)Start selected MFV pump 7)Open MFV pump discharge valve 8)Open MFV flow control bypass valves as necessary to restore S/G level e.Go to Step 10 a.Go to Step 6.b.IF offsite power available, THEN try to place condensate system in service.IF NOT, THEN go to Step 6.d.IF MFV flow can NOT be established, THEN go to Step 6.

I'\'1 q gJ o EOP: FR-H.l TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 8 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 6 Establish SAFW Flow: a.Perform the following:

1)Align SAFV system for operation (Refer to Attachment SAFV)2)Start both SAPV pumps 3)Verify SAPV total flow-GREATER THAN 200 GPM a.IF greater than 200 gpm, total SAFW flow can NOT be established, THEN go to Step 7.b.Go to Step 10***************,.**************************CAUTION IF VIDE RANGE LEVEL IN BOTH S/GS DECREASES TO LESS THAN 35 INCHES[100 INCHES ADVERSE CNMT]OR IP PRZR PRESSURE INCREASES TO GREATER THAN 2335 PSIG DUE TO LOSS OF HEAT SINK, THEN STEPS 12 THROUGH 14 SHOULD BE IMMEDIATELY INITIATED POR BLEED AND FEED.7 Check Condensate Pumps-ANY RUNNING r IF offsite power available, THEN manually start at least one condensate pump.IF a condensate pump can NOT be started, THEN go to Step 11.

F~w.41'I EOP: FR-H.1 TITLE: RESPONSE TO LOSS"'OF SECONDARY HEAT SINK REV 10 PAGE 9 of 26 STEP ACTION/EXPECTED RESPONSE'ESPONSE NOT OBTAINED Establish Condenser Steam Dump PreSsure Control: a.Verify condenser available:

o Any MSIV-OPEN'o Annunciator G-15, STEAM DUMP-LIT a.Place S/G ARV controllers in AUTO at desired pressure and go to,Step 9.b.Adjust condenser steam dump controller HC-484 to desired pressure and verify in AUTO c.Place steam dump mode selector svitch to MANUAL l~h~~I 1 EOP: FR-H.l TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 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.9 Try To Establish Feed Flow From Condensate System: a.Establish condensate flowpath (Refer to Attachment COND TO S/G)b.Depressurize RCS to less than 1950 psig: 1)Deenergize PRZR heaters 2)Check letdown-IN SERVICE 3)Depressurize using auxiliary spray valve (AOV-296)c.WHEN RCS pressure less than 1950 psig, THEN perform the following:

1)Block SI 2)Dump steam to condenser at maximum rate to depressurize at least one S/G to less than 380 psig d.Verify condensate flow to S/Gs a.Go to Step 11.2)Use one PRZR PORV.IF IA NOT available, THEN refer to Attachment N2 PORVS.IF PORV NOT'available, THEN use auxiliary spray valve, AOV-296 and go to Step 9c.2)Manually or locally dump steam using intact S/G ARV.d.Go to Step 11.

l as EOP: FR-H.1 RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 11 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 10 Check S/G Levels: a.Narrow range level in at least one S/G-GREATER THAN 5%[25%adverse CNMT]b.Return to procedure and step in effect a.IF feed flow verified,to at least one S/G, THEN maintain flow to restore narrow range level greater than 5%[25%adverse CNMT].IF NOT verified, THEN go to Step 11.11 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 12 to initiate bleed and feed cooling.*****************************************

CAUTION STEPS 12 THROUGH 14 MUST BE PERFORMED QUICKLY IN ORDER TO ESTABLISH RCS HEAT REMOVAL BY RCS BLEED AND FEED.c A'***4****4*4*******************4

            • 12 Actuate SI and CI I>A*~4$P~

EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 12 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION WHEN BAST LEVEL DECREASES TO 10X, THEN SI PUMP AUTOMATIC SWITCHOVER TO RWST SHOULD BE ENSURED.13 Vex'ify 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.IP a feed path can NOT be established, THEN continue attempts to establish feed flow.Return to Step 3.14 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 XP 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 overpressurization nitrogen system to open both PRZR PORVs (Refer to Attachment N2 PORVS)c.'P BOTH PRZR PORVs can NOT be opened, THEN perform the following:

1)Ensure both PORV switches in OPEN.2)Go to Step 15.

I)c 4,r II EOPD FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 13 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION IF OFFSITE POWER IS LOST AFTER SI RESET, SELECTED SW PUMPS AND ONE CCV PUMP VILL AUTO START ON EMERGENCY D/G.MANUAL ACTION VILL BE REQUIRED TO RESTART SAFEGUARDS EQUIPMENT.

15 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 16.IF PRZR pressure decreasing, THEN perform the following:

1)VHEN PRZR pressure less than 1750 psig, THEN reset SI.2)Go to Step 16.16 Reset CI: a.Depress CI reset pushbutton b.Verify annunciator A-26, CONTAINMENT ISOLATION-EXTINGUISHED b.Perform the following:

1)Reset SI.2)Depress CZ reset pushbuttou I~~l l EOP FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 14 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 17 Veri f y 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).IP less than two SW pumps can be operated, THEN go to Step 20.b.Establish SW to AUX BLDG (Refer to Attachment AUX BLDG SW).

a<<C j1' EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 15 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 Establish IA to CNMT: a.Verify non-safe'guards 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 lA supply: o Pressure-GREATER THAN 6O 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 20.WHEN IA restored, THEN do Steps 18e, f and 19.

~i l~V)P~p l*C.

EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 16 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 19 Restore RCS Overpressurization Nitrogen System To Standby: a.Verify instrument bus D-ENERGIZED b.Place relief valve PC-431 and PC-430 arming switches to BLOCK~SOV-8619A~SOV-8619B a.Perform the following:.

1)Ensure steam dump mode control in MANUAL.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"lose temporarily until adequate IA pressure is restored in CNMT.20 Verify Adequate RCS Bleed Path-BOTH PRZR PORVS OPEN IR PRZR PORVs can NOT be opened, THEN perform the following:

a.Open Rx vessel head vents.~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 the depressurized S/Gs.

r

(~EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 17 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION THE RCS BLEED PATH MUST BE MAINTAINED EVEN IF RCS PRESSURE REMAINS GREATER THAN SI PUMP SHUTOFF HEAD.~N*********~***********~*****************21 Maintain RCS Heat Removal: o Maintain SI flow o Maintain both PRZR PORVs and block valves-OPEN 22 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).

A EOP: FR-H.1 TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 18 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 2F Cheek If Charging Flow Hae Been Established:

a.Charging pumps-ANY RUNNING b.Align charging pump suction to RWST: o LCV-112B-OPEN o LCV-112C-CLOSED a.Perform the following:

1)IR CCW flow is lost to any RCP thermal barrier OR any RCP fl 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 OX.b.IR LCV-112B can NOT be opened, THEN perform the following:

1)Verify charging pump A NOT running and place in PULL STOP.2)Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).c.Start charging pumps as necessary and establish maximum charging flow 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).

f a I ,Q'I (t1 EOP: FR-H.l TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 19 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED*****************************************CAUTION o IF RWST LEVEL DECREASES TO LESS THAN 28X, 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.24 Continue Attempts To Establish Secondary Heat Sink In At Least One S/G:~AFW flow~Main FW flow~Standby AFW flow~Condensate flow 25 Check For Adequate Secondary Heat Sink: a.Check narrow range level in at least one S/G-GREATER THAN 5X[25X adverse CNMT]b.Adjust S/G ARV controllers to existing S/G pressure a.Return to Step 24.

4 P@el g;g4~4 EOP: FR-H.l TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 20 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.

C 26 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 24.27 Check CCW Pumps-ANY RUNNING Perform the following:

a.IF any RCP$1 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 1').

EOP: FR-H.1 TiTLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 21 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED***************************************'**CAUTION, IP RCS IS SOLID, THEN TERMINATION OF FEED AND BLEED MAY RESULT IN RAPID RCS PRESSURE INCREASE UNLESS RCS INFLOW AND OUTFLOW ARE CAREFULLY CONTROLLED.

28 Check If One Of Three SI Pumps Should Be Stopped: a.Three SI pumps-RUNNING b.RCS subcooli'ng based on core exit T/Cs-GREATER THAN 35'P[90'F adverse CNMT]USING PIGURE MIN SUBCOOLING c.Check PRZR level-GREATER THAN 13X[40X adverse CNMT]d.Stop one SI pump a.Go to Step 29.b.Check the folloving:

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 IP NOT, THEN go to Step"31.c.Do NOT stop SI pump.Go to Step 31.

I I a r~0>>V l,b EOP: FR-H.1 TITLE: RESPONSE TO L'OSS OF SECONDARY HEAT SINK REV: 10 PAGE 22 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 29 Check If One Of Two SI Pumps Should Bq Stopped: a.Two SI pumps-RUNNING b.Determine required RCS subcooling from table: a.Go to Step 30.Charging Pump Availability NONE ONE TVO THREE RCS Subcooling Criteria 120'F[200'P adverse CNMT]115'F[190'P adverse CNMT]105'F[180'F adverse CNMT]100'F[175'P adverse CNMT]c.RCS subcooling based on core exit T/Cs-GREATER THAN VALUE PROM TABLE ABOVE USING PIGURE MIN SUBCOOLING d.PRZR level-GREATER THAN 13K[40X 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'P using Figure MIN SUBCOOLING IF NOT, THEN go to Step 31.d.Do NOT stop SI pump.Go to Step 31.

~j'4'Cl EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 23 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 30 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'sig[1825 psig adverse CNMT]c.PRZR level-GREATER THAN 13X[40X adverse CNMT]d.Stop running SI pump e.Go to Step 32 a.Go to Step 32.b.Go to Step 31.c.Do NOT stop SI pump.Go to Step 31.

I J hr-EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 24 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE: After closing a PORV, lt may be necessary to wait for RCS pressure to increase to permit stopping SI pumps in Steps 28, 29 and 30.31 Check PRZR PORV Stat;us: a.PRZR PORVs-ANY OPEN b.PRZR PORVs-BOTH OPEN a.Close any open Rx vessel head'ent valves and go to appropriate plant procedure:

o IF RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARYCOOLANT, Step l.-OR-o IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.b.IF PRZR level greater than 75%(65%adverse CNMTJ, THEN perform the following:

1)Establish excess letdown as follows: o Place AOV-312 to NORMAL.o Ensure CCW pump running.o Ensure CCW from excess letdown Hx open (AOV-745).

o Open exc'ess letdown isolation valve AOV-310.This Step continued on the next page.o Slowly open HCV-123.2)Stop all but one charging pump and decrease charging flow to as necessary to control-RCS pressure.

I 1 l EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 25 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED (Step 31 continued from previous page)c.Close one open PRZR PORV c.Close PORV block'valve.IP block valve can NOT be closed, THEN go to appropriate plant procedure:

o IP RWST level greater than 28%, THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step l.-OR-o IF RWST level less than 28%, THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION, Step l.d.Return to Step 28******k**********************************CAUTION IP RCS IS SOLED, CLOSURE OF PORVS WILL RESULT IN RAPID RCS PRESSURE INCREASE UNLESS RCS INPLOW AND OUTPLOW ARE CAREFULLY CONTROLLED.

'I 32 Check PRZR PORVs And Rx Vessel Head Vent Valves-ALL CLOSED Close all PRZR PORVs and Rx vessel head vent valves.IP any PRZR PORV can NOT be closed, THEN manually close its block valve.

1 k f Wl EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 PAGE 26 of 26 STEP ACTION/EXPECTED RESPONSE RESPONSE NOT OBTAINED 33 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 28X)THEN go to E-l, LOSS OF REACTOR OR SECONDARY COOLANT, Step l.-OR-b.Stop RHR pumps and place in AUTO o IF RWST level less than 28X)THEN go to ES-1.3, TRANSFER TO COLD LEG RECIRCULATION)

Step 1.34 Start Charging Pumps As Necessary And Control Charging Flow To Maintain PRZR Level 35 Go To ES-1.1)SI TERMINATION)

Step 8-END-I A 0 EOP: FR-H.1 TITLE: RESPONSE TO LOSS OF SECONDARY HEAT SINK REV: 10 PAGE 1 of 1 FR-H.1 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 T l 4.'I EOP: FR-H.l TITLE RESPONSE TO LOSS OF SECONDARY HEAT SINK REV 10 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 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 S PRESSURE (PSIG)RCS PRESSURE INCREMENTS 20 PSIG SUBCOOLED REGION E CNMT ADVERS NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE

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