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.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:PAGE12of26ROCHESTER GASANDELECTRICCORPORATION GINNASTATIONCONTROLLED COPYNUMBERTECHNICAL REVIEWPORCREVIEWATE8<yPLANTSUPERTDENTFECTIVEDATECATEGORY1.0REVIEWEDBY:9305140051 930505PDRADQCK05000244'~FPDR 0

EOP:FR-H.lRESPONSETOLOSSOFSECONDARY HEATSINKREV'2PAGE2of26A.PURPOSE-Thisprocedure providesactionsforresponding

'toalossofsecondary heatsinkinbothS/Gs.B.ENTRYCONDITIONS/SYMPTOMS 1.ENTRYCONDITIONS

-Thisprocedure isenteredfrom:a.E-O,REACTORTRIPORSAFETYINJECTION, whenminimumAFWflowisnotverifiedANDnormalrangelevelinbothS/Gsislessthan54[254adverseCNMT]b.F-0.3,HEATSINKCriticalSafetyFunctionStatusTreeonaREDcondition.

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE3of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************

CAUTIONoIFTOTALFEED"FLOWISLESSTHAN200GPMDUETOOPERATORACTION,THISPROCEDURE SHOULDNOTBEPERFORMED.

oFEEDFLOWSHOULD.NOTBEREESTABLISHED TOAFAULTEDS/GIFANON-FAULTED S/GISAVAILABLE, NOTE:AdverseCNMTvaluesshouldbeusedwheneverCNMTpressureisgreaterthan4psigorCNMTradiation isgreaterthan10+">R/hr.1CheckIfSecondary HeatSinkIsRequired:

a.RCSpressure-GREATERTHANANYNON-FAULTED S/GPRESSUREb.Checkthefollowing:

oRCScoldlegtemperature-GREATERTHAN350'FoRCSpressure-GREATERTHAN400psig[300psigadverseCNMT]a.IFRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT,Stepl.IFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION, Step1.b.TrytoplaceRHRSysteminservicewhilecontinuing withthisprocedure:

1)ResetSIifnecessary.

2)Placeletdownpressurecontroller inMANUALCLOSED.3)Checkthefollowing valves-OPEN'AOV-371,letdownisolation valve~AOV-427,loopBcoldlegtoREGENHx~Atleastoneletdownorificevalve(AOV-200A, AOV-200B, orAOV-202)4)IFpressureonPI-135lessthan400psig,THENestablish RHRnormalcooling(RefertoAttachment RHRCOOL).IFadequatecoolingwithRHRsystemestablished, THENreturntoprocedure andstepineffect.

EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE4of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED2MonitorSecondary HeatSink:oVerifyeitherS/Glevel-WIDERANGEGREATERTHAN35inches[100inchesadverseCNMT]oVerifyPRZRpressure-LESSTHAN2335PSIGIFalossofheatsinkisindicated, THENperformthefollowing:

a.TripbothRCPs.b.GotoStep13toini.tiate bleedandfeedcooling.

EOP:FR-H-1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE5of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED3TrytoEstablish AFWFlowToAtLeastOneS/G:a.CheckMCBindications forcauseofAFWfailure:1)VerifyCSTlevel-GREATERTHAN5FEET2)Verifybussessupplying powertoMDAFWpumps-ENERGIZED

~Bus14~Bus163)CheckAFWvalvealignment oAFWpumpdischarge valvesOPEN~MOV-4007~MOV-4008~MOV-3996oTDAFWpumpflowcontrolvalves*-OPEN~AOV-4297~AOV-4298b.CheckAFWpumps-ALLRUNNINGc.ChecktotalflowtoS/GsGREATERTHAN200GPMd.Returntoprocedure andstepineffect1)RefertoER-AFW.1, ALTERNATE WATERSUPPLYTOAFWPUMPS.2)ContinueattemptstorestorepowertoMDAFWpumps.3)DispatchAOtolocallyalignvalves,asnecessary.

b.Performthefollowing:

1)ManuallystartMDAFWpumps.2)CheckTDAFWpumpsteamsupplyvalvesOPEN.~MOV-3504A

~MOV-3505A 3)Ifnecessary dispatchAOtolocallyresetTDAFWpumpgovernorvalve.4)IFNOAFWpumpsoperable, THENgotoStep4.c.ContinueattemptstorestoreAFWflowandgotoStep4.

~N EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE6of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED4StopBothRCPs*****************************************CAUTIONIFOFFSITEPOWERISLOSTAFTERSIRESET,THENSELECTEDSWPUMPSANDONECCWPUMPWILLAUTOSTARTONEMERGENCY D/G.MANUALACTIONWILLBEREQUIREDTORESTARTSAFEGUARDS EQUIPMENT.

5ResetSIIfActuated

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE7of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED6TryToEstablish MFWFlowToAtLeastOneS/G:a.CheckanyMFWpump-AVAILABLE b.Checkcondensate system:oCondensate pump-ANYRUNNINGoMFWpumpsuctionpressureGREATERTHAN185PSIGa.GotoStep7.b.IFoffsitepoweravailable, THENtrytoplacecondensate systeminservice.IFNOT,THENgotoStep7.c.Establish MFWflow:1)Check.MFWpumpdischarge valves-CLOSEDc.IFMFWflowcanNOTbeestablished, THENgotoStep7.2)VerifyMFWregulating orbypassvalves-OPERABLE3)DispatchAOtorestoreMFWpumpSWcooling4)VerifyS/GblowdownkeyswitchesinNORMAL5)EnsureoneMFWpumprecircvalve-'OPEN6)StartselectedMFWpump7)OpenMFWpumpdischarge valve8)OpenMFWregulating orbypassvalvesasnecessary torestoreS/Gleveld.GotoStepll

EOP:FR-HE1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE8of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED7Establish SAFWFlow:a.Performthefollowing:

1)AlignSAFWsystemforoperation (RefertoAttachment SAFW)a.IFgreaterthan200gpm,totalSAFWflowcanNOTbeestablished, THENgotoStep8.2)StartbothSAFWpumps3)VerifySAFWtotalflow-GREATERTHAN200GPMb.GotoStepll*****************************************CAUTIONIFWIDERANGELEVELINBOTHS/GSDECREASES TOLESSTHAN35INCHES[100INCHESADVERSECNMT]ORIFPRZRPRESSUREINCREASES TOGREATERTHAN2335PSIGDUETOLOSSOFHEATSINK,THEN.STEPS13THROUGH15SHOULDBEIMMEDIATELY INITIATED FORBLEEDANDFEED.8Establish Conditions to.FeedS/G(s)FromCondensate System:a.Checkcondensate pumps-ANYRUNNING'.Establish condensate flowpath(RefertoAttachment CONDtoS/G)c.De-energize PRZRheatersa.IFoffsitepoweravailable, THENmanuallystartatleastonecondensate pump.IFacondensate pumpcanNOTbestarted,THENgotoStep12.

4~k EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE9of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED9Establish Condenser SteamDumpPressureControl:a.Verifycondenser available:

oAnyMSIV-OPENoAnnunciator G-15,STEAMDUMPARMED-LITa.PlaceS/GARVcontrollers inAUTOatdesiredpressureandgotoStep10.b.Adjustcondenser steamdumpcontroller HC-484tohighestS/Gpressurec.Verifycondenser steamdumpcontroller HC-484inAUTOd.PlacesteamdumpmodeselectorswitchtoMANUAL

'*h~t=.4,~

EOP:FR-H.1TLTLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE10of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONFOLLOWING BLOCKOFAUTOMATIC SIACTUATION, MANUALSIACTUATION MAYBEREQUIREDIFCONDITIONS DEGRADE.NOTE:Ifauxiliary sprayisinuse,sprayflowmaybeincreased byclosingnormalchargingvalveAOV-294andnormalPRZRsprayvalves.10Establish Condensate FlowtoS/G:a.CheckRCSpressure-GREATERTHAN1950PSIGb.Depressurize RCStolessthan1950psig:1)Checkletdown-INSERVICE2)Depressurize usingauxiliary sprayvalve(AOV-296) c.WHENPRZRpressurelessthan1950psig,THENplaceSIblockswitchestoBLOCK~TrainA~TrainBd.VerifySAFETYINJECTION BLOCKEDstatuslight-LITe.ManuallyopenMFWflowcontrolvalvesasdesiredf.Dumpsteamtocondenser atmaximumratetodepressurize atleastoneS/Gtolessthan380psigg.Verifycondensate flowtoS/Gsa.GotoStep10c.1)UseonePRZRPORV.IFIAtoCNMT,AOV-5392, NOTopen,THENrefertoAttachment N2PORVS.IFPORVNOTavailable, THENuseauxiliary sprayvalve,AOV-296andgotostep10c.2)UseonePRZRPORV.IFIAtoCNMT,AOV-5392, NOTopen,THENrefertoAttachment N2PORVS.e.ManuallyopenMFWflowcontrolbypassvalves.f.ManuallyorlocallydumpsteamusingintactS/GARV.g.GotoStep12.

EOP:FR-H.1TITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE11of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFCSTLEVELDECREASES TOLESSTHAN5FEET,THENALTERNATE WATERSOURCESFORAFWPUMPSWILLBENECESSARY (REFERTOER-AFW.1, ALTERNATE WATERSUPPLYTOAFWPUMPS).11CheckS/GLevels:a.NarrowrangelevelinatleastoneS/G-GREATERTHAN58[258adverseCNMT]b.Returntoprocedure andstepineffecta.IFfeedflowverifiedandlevelincreasing inatleastoneS/G,THENmaintainflowtorestorenarrowrangelevelgreaterthan58[258adverseCNMT]..IFNOTverified, THENgotoStep12.12VerifySecondary HeatSink:a.Checkthefollowing:

oEitherS/Glevel-WIDERANGEGREATERTHAN35inches[100inchesadverseCNMT]oPRZRpressure-LESSTHAN2335PSIGb.ReturntoStep1a.IFlossofheatsinkisindicated, THENperformthefollowing:

1)TripbothRCPs.2)GotoStep13toinitiatebleedandfeedcooling.

Tt FR-HE1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE12of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONSTEPS13THROUGH15MUSTBEPERFORMED QUICKLYINORDERTOESTABLISH RCSHEATREMOVALBYRCSBLEEDANDFEED.13ActuateSIandCI*****************************************CAUTIONWHENBASTLEVELDECREASES TO10%,THENSIPUMPAUTOMATIC SWITCHOVER TORWSTSHOULDBEENSURED.14VerifyRCSFeedPath:a.CheckSIpumps-ATLEASTONERUNNINGb.Checkvalvealignment foroperating SIpumps-PROPEREMERGENCY ALIGNMENT Manuallystartpumpsandalignvalvesasnecessary toestablish RCSfeedpath.IFafeedpathcanNOTbeestablished, THENcontinueattemptstoestablish feedflow.ReturntoStep3.

EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE13of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED15Establish RCSBleedPath:a.OpenbothPRZRPORVblockvalvesa.EnsurepowertoMCCssupplying blockvalves.~MCCCforMOV-515~MCCDforMOV-516b.PlacebothPRZRPORVswitchestoOPENIFanyblockvalvecanNOTbeopened,THENdispatchAOtolocallycheckbreaker:~MOV-515,MCCCposition6C~MOV-516,MCCDposition6Cc.AlignRCSoverpressure protection systemtoopenbothPRZRPORVs(RefertoAttachment N2PORVS)d.VerifyPORVs-BOTHOPENd.IFBOTHPRZRPORVscanNOTbeopened,THENensurebothPORVswitchesinOPEN.

'IIIp~~

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE14of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFOFFSITEPOWERISLOSTAFTERSIRESET(THENSELECTEDSWPUMPSANDONECCWPUMPWILLAUTOSTARTONEMERGENCY D/G.MANUALACTIONWILLBEREQUIREDTORESTARTSAFEGUARDS EQUIPMENT.

16CheckIfSICanBeReset:a.Checkthefollowing:

oPRZRpressure-LESSTHAN1750PSIG-OR-oEithersteamline pressure-LESSTHAN514PSIGb.ResetSIa.IFPRZRpressurestableorincreasing, THENresetSIandgoto.Step17'FPRZRpressuredecreasing, THENperformthefollowing:

1)WHENPRZRpressurelessthan1750psig,THENresetSI.2)GotoStep17.17ResetCI:a.DepressCIresetpushbutton b.Verifyannunciator A-26,CONTAINMENT ISOLATION EXTINGUISHED b.Performthefollowing:

1)ResetSI.2)DepressCIresetpushbutton l"IIl~4tk0~~

EOP:FR-H.1TITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE15of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED18VerifyAdequateSWFlow:a.VerifyatleasttwoSWpumpsRUNNINGb.VerifyAUXBLDGSWisolation valves-ATLEASTONESETOPEN~MOV-4615andMOV-4734~MOV-4616andMOV-4735a.Manuallystartpumpsaspowersupplypermits(258kweach).IFlessthantwoSWpumpscanbeoperated, THENgotoStep21.b.Establish SWtoAUXBLDG(RefertoAttachment AUXBLDGSW).

I' EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE16of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED19Establish IAtoCNMT:a.Verifynon-safeguards bussesenergized fromoffsitepoweroBus13normalfeed-CLOSED-OR-oBus15normalfeed-CLOSEDb.VerifyturbinebuildingSWisolation valves-OPEN~MOV-4613andMOV-4670~MOV-4614andMOV-4664c.Verifyatleasttwoaircompressors

-RUNNINGd:CheckIAsupply:oPressure-GREATERTHAN60PSIGoPressure-STABLEORINCREASING e.ResetbothtrainsofXYrelaysforIAtoCNMTAOV-5392f.VerifyIAtoCNMTAOV-5392-OPENa.Performthefollowing:

1)Closenon-safeguards bustiebreakers:

~Bus13toBus14tie~Bus15toBus16tie2)Verifyadequateemergency D/Gcapacitytorunaircompressors (75kweach).IFNOT,THENevaluateifCNMTRECIRCfansshouldbestopped(RefertoAttachment CNMTRECIRCFANS).3)WHENbus15restored, THENresetcontrolroomlighting.

b.Manuallyalignvalves.c.Manuallystartaircompressors aspowersupplypermits(75kweach).IFaircompressors canNOTbestarted,THENdispatchAOtolocallyresetcompressors asnecessary.

d.Performthefollowing:

1)ContinueattemptstorestoreIA(RefertoAP-IA.1,LOSSOFINSTRUMENT AIR).2)ContinuewithStep21.WHENIArestored, THENdoSteps19e,fand20.

e' EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE17of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED20RestoreRCSOverpressure Protection SystemToStandby:a.Verifyinstrument busD-ENERGIZED a.Performthefollowing:

1)EnsuresteamdumpmodecontrolinMANUAL.b.PlacereliefvalvePC-431andPC-430armingswitchestoBLOCK~SOV-8619A

~SOV-8619B 2)Restorepowertoinstrument busDfromMCCBorMCCA(maintenance supply).c.CloseSURGETKVLVs~SOV-8616A

~SOV-8616B NOTE:PRZRPORVsmayclosetemporarily untiladequateIApressureisrestoredinCNMT.21VerifyAdequateRCSBleedPatn:oCoreexitT/Cs-STABLEORDECREASING oLevel(noRCPs)-GREATERTHAN68%'73%adverseCNMT]Performthefollowing:

a.OpenRxheadventvalves.~SOV-590~SOV-591~SOV-592~SOV-593b.Depressurize atleastoneintactS/Gtoatmospheric pressureusingS/GARV~c.Alignanyavailable lowpressurewatersourcetodepressurized S/Gs.

EOPIFR-H.lTITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE18of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONACTIONSTAKENTOINITIATERCSFEEDANDBLEEDSHALLNOTBEREVERSEDWHENPERFORMING IMMEDIATE ACTIONSOFE-O,REACTORTRIPORSAFETYINJECTION.

22CompleteTheImmediate ActionsOfE-O,REACTORTRIPORSAFETYINJECTION, WhileContinuing WithThisProcedure CAUTIONTHERCSBLEEDPATHMUSTBEMAINTAINED EVENIFRCSPRESSUREREMAINSGREATERTHANSIPUMPSHUTOFFHEAD.23MaintainRCSHeatRemoval:oMaintainSIflowoMaintainbothPRZRPORVsandblockvalves-OPEN24CheckNormalPowerAvailable ToChargingPumps:oBus14normalfeedbreaker-CLOSEDoBus16normalfeedbreaker-CLOSEDVerifyadequateemergency D/Gcapacitytorunchargingpumps(75kweach).IFNOT,THENevaluateifCNMTRECIRCfanscanbestopped(RefertoAttachment CNMTRECIRCFANS).

FR-H.1TITLE:'IRESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE19of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED25CheckIfChargingFlowHasBeenEstablished:

a.Chargingpumps-ANYRUNNINGa.Performthefollowing:

1)IFCCWflowislosttoanyRCPthermalbarrierORanyRCP¹1sealoutlettemperature offscalehigh,THENdispatchAOwithkeytoRWSTgatetolocallyclosesealinjection needlevalve(s)toaffectedRCP:~RCPA,V-300A~RCPB,V-300B2)EnsureHCV-142open,demandat0%.b.AlignchargingpumpsuctiontoRWST:oLCV-112B-OPENoLCV-112C-CLOSEDb.IFLCV-112BcanNOTbeopened,THENperformthefollowing:

1)VerifychargingpumpANOTrunningandplaceinPULLSTOP.c.Startchargingpumpsasnecessary andestablish maximumchargingflow2)DispatchAOtolocallyopenmanualchargingpumpsuctionfromRWST(V-358locatedinchargingpumproom).3)WHENV-358open,THENdirectAOtocloseV-268toisolatechargingpumpsBandCfromVCT(V-268locatedinchargingpumproom).

0ll1~>I EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE20of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONoIFRWSTLEVELDECREASES TOLESSTHAN28%,THENTHESISYSTEMSHOULDBEALIGNEDFORCOLDLEGRECIRCULATION USINGSTEPS1THROUGH13OFES-1.3,TRANSFERTOCOLDLEGRECIRCULATION.

oIFCONTAINMENT PRESSUREINCREASES TOGREATERTHAN28PSIG,CONTAINMENT SPRAYSHOULDBEVERIFIED.

oRHRPUMPSSHOULDNOTBERUNLONGERTHAN1HOURWITHOUTCCWTOTHERHRHEATEXCHANGERS.

26ContinueAttemptsToEstablish Secondary HeatSinkInAtLeastOneS/G:~AFWflow~MainFWflow~StandbyAFWflow~Condensate flow27CheckForAdequateSecondary HeatSink:a.ChecknarrowrangelevelinatleastoneS/G-GREATERTHAN5%[25%adverseCNMT]b.AdjustS/GARVcontrollers toexistingS/Gpressurea.ReturntoStep26.

t>~

EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE21of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFTHERCSISWATERSOLID,THENANYINCREASEINRCSTEMPERATURE MAYRESULTINASIGNIFICANT RCSPRESSUREINCREASE.

RCSHEATUPSHOULDBEPREVENTED.

28MonitorRCSTemperatures:

oCoreexitT/Cs-DECREASING oRCShotlegtemperatures DECREASING Performthefollowing:

a.Controlsteamdumpandfeedflowtoestablish naturalcirculation andstabilize RCStemperature.

b.ReturntoStep26.29CheckCCWPumps-ANYRUNNINGPerformthefollowing:

a.IFanyRCP¹1sealoutlettemperature offscalehigh,THENisolateCCWtothermalbarrierofaffectedRCP(s).~RCPA,MOV-749AandMOV-759A~RCPB,MOV-749BandMOV-759Bb.ManuallystartoneCCWpump(124kw).30Verify'ReactorHeadVentValves-CLOSEDManuallyclosevalves.~SOV-590~SOV-591~SOV-592~SOV-593 I4 EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE22of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED**************************%**************CAUTIONIFRCSISSOLID,THENTERMINATION OFFEEDANDBLEEDMAYRESULTINRAPIDRCS.PRESSUREINCREASEUNLESSRCSINFLOWANDOUTFLOWARECAREFULLY CONTROLLED.

31CheckIfOneOfThreeSIPumpsShouldBeStopped:a.ThreeSIpumps-RUNNINGb.RCSsubcooling basedoncoreexitT/Cs-GREATERTHAN35'F[90'FadverseCNMT)USINGFIGUREMINSUBCOOLING c.CheckPRZRlevel-GREATERTHAN13%[40%adverseCNMT]d.StoponeSIpumpa.GotoStep32.b.Checkthefollowing:

oRCSpressuregreaterthan1625psig[1825psigadverseCNMT)oRCSsubcooling basedoncoreexitT/CsgreaterthanO'usingFigureMINSUBCOOLING IFNOT,THENgotoStep34'.DoNOTstopSIpump.GotoStep34.,

C EOP:FR-H.lTITLEIRESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE23of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED32CheckIfOneOfTwoSIPumpsShouldBeStopped:a.Two.SIpumps-RUNNINGb.'etermine requiredRCSsubcooling fromtable:a.GotoStep33.ChargingPUIIlpAvailability NONEONETHREERCSSubcooling Criteria120'F[200'FadverseCNMT]115'F[190'FadverseCNMT].105'F[180'FadverseCNMT]100'F[175'FadverseCNMT]c.RCSsubcooling basedoncoreexitT/Cs-GREATERTHANVALUEFROMTABLEABOVEUSINGFIGUREMINSUBCOOLING d.PRZRlevel-GREATERTHAN13%[40%adverseCNMT]e.StoponeSIpumpc.Checkthefollowing:

oRCSpressuregreaterthan1625psig[1825psigadverseCNMT]oRCSsubcooling basedoncoreexitT/CsgreaterthanO'usingFigureMINSUBCOOLING IFNOT,THENgotoStep34.d.DoNOTstopSIpump.GotoStep34.

EOP:FR-H.1TITLE:RESPONSETOLOSS.OFSECONDARY HEATSINKREV:12PAGE24of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED33CheckIfLastSIPumpShouldBeStopped:a.OneSIpump-RUNNINGb.Checkthefollowing:

oRCSsubcooling basedoncoreexitT/CsgreaterthanO'usingFigureMINSUBCOOLING oRCSpressuregreaterthan1625psig[1825psigadverseCNMT)c.PRZRlevel-GREATERTHAN13%[40%adverseCNMT]d.StoprunningSIpumpe.GotoStep36a.GotoStep36.b.GotoStep34.c.DoNOTstopSIpump.GotoStep34.NOTE:AfterclosingaPORV,itmaybenecessary towaitforRCSpressuretoincreasetopermitstoppingSIpumpsinSIreduction steps.34CheckPRZRPORVsAndAssociated BlockValves-ANYBLEEDPATHOPENGotoappropriate plantprocedure:

oIFRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT.-OR-oIFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION.

t EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE25of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFRCSISSOLID,CLOSUREOFPORVSWILLRESULTINRAPIDRCSPRESSUREINCREASEUNLESSRCSINFLOWANDOUTFLOWARECAREFULLY CONTROLLED.

35IsolatePRZRBleedPaths:a.PRZRPORVs-BOTHOPENb.CloseoneopenPRZRPORVc.ReturntoStep31a.Performthefollowing:

1)Stopallbutonechargingpump~2)Controlchargingflowasnecessary tomaintainRCSpressureandPRZRlevel.3)Establish excessletdownasfollows:oPlaceAOV-312toNORMAL.oEnsureCCWpumprunning.oManuallyopenCCWfromexcessletdownHxopen(AOV-745).

oOpenexcessletdownisolation valveAOV-310.oSlowlyopenHCV-123.b.ClosePORVblockvalve.IFblockvalvecanNOTbeclosed,THENgotoappropriate plantprocedure:

oIFRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT.-OR-oIFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION.

A EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE26of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED36CheckPRZRPORVs-BOTHCLOSEDClosebothPRZRPORVs.IFanyPRZRPORV"canNOTbeclosed,THENmanuallycloseitsblockvalve.37CheckIfRHRPumpsShouldBeStopped:a.CheckRCSpressure:

1)Pressure-GREATERTHAN250psig[465psigadverseCNMT]2)Pressure-STABLEORINCREASING a.Gotoappropriate plantprocedure:

oIFRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT,Step1.'OR-b.StopRHRpumpsandplaceinAUTOoIFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION, Step1.38StartChargingPumpsAsNecessary AndControlChargingFlowToMaintainPRZRLevel39GoToES-1.1,SITERMINATION'tep 8-END-

FOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV12PAGE1of1FR-H.lAPPENDIXLISTTITLEPAGES1)FIGUREMINSUBCOOLING 2)ATTACHMENT CNMTRECIRCFANS3)ATTACHMENT CONDTOS/G4)ATTACHMENT N2PORVS5)ATTACHMENT SD-16)ATTACHMENT RHRCOOL7)ATTACHMENT SAFW8)ATTACHMENT AUXBLDGSW

EOP:FR-H.1T!TLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:12PAGE1of1FIGUREMINSUBCOOLING NOTE:Subcooling Margin=Saturation Temperature FromFigureBelow[-]CoreExitT/CIndication RC.25002400230022002100200019001800170016001500140013001200110010009008007006005004003002001000SPRESSURE(PSIG)RCSPRESSUREINCREHENTS 20PSIGSUBCOOLED REGIONADVERSECNHTNORHALCNHTINADEQUATE SUBCOOLING REGIONTEHPERATURE INCREMENTS 10'F200250300350400450500550600650700COREEXITSATURATION TEHPERATURE

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