ML17262A543

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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)
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Text

c,~~EOP:F@-H.1TITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE1of26ROCHESTER GASANDELECTRICCORPORATION GINNASTATION'CONTROLLED COPYNUMBERTECHNICAL REVIEWPORCREVIEWDATETSUPERINTEND NTC'EFECTEDATECATEGORY1.0REVIEWEDBY:91,07110296 910619PDRADOCK05000244FPDR CW~~4*N~eV$

EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE2of26A.PURPOSE-Thisprocedure providesactionsforresponding toalossofsecondary heatsinkin'bothS/Gs.B.ENTRYCONDITIONS/SYMPTOMS 1.ENTRYCONDITIONS

-Thisprocedure isenteredfrom:a.E-O,REACTORTRIPORSAFETYINJECTION, whenminimumAFWflowisnotverified.

b.F-0.3,HEATSINKCriticalSafetyFunctionStatusTreeonaREDcondition.

l~*Pt~

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE3of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONoIFTOTALFEEDFLOWIS,LESSTHAN200GPMDUETOOPERATORACTION,THISPROCEDURE SHOULDNOTBEPERFORMED.

oFEEDFLOWSHOULDNOTBEREESTABLISHED TOAFAULTEDS/GIFANON-FAULTED S/GISAVAILABLE.

NOTE:AdverseCNMTvaluesshouldbeusedwheneverCNMTpressureisgreaterthan4psigorCNMTradiation isgreaterthan10-~~R/hr.1CheckIf.Secondary HeatSinkIsRequired:

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

oRCScoldlegtemperature-GREATERTHAN350'FoRCSpressure-GREATERTHAN400psig[300psigadverseCNMT)a.IFRWSTlevelgreaterthan28X,THENgotoE-l,LOSSOFREACTOROR,SECONDARY COOLANT,Stepl.IFRWSTlevellessthan28X,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-135lesstEan400psig,THENestablish RHRnormalcooling(RefertoAttachment RHRCOOL).IFadequatecoolingwithRHRsystemestablished, THENreturntoprocedure andstepineffect.

~~C EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE4of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED2MonitorSecondary HeatSink:oVerifyeitherS/Glevel-WIDERANGEGREATERTHAN35inches[100inchesadverseCNMT]oVerifyPRZRpressure-LESSTHAN2335PSIGIpalossofheatsinkisindicated, THENperformthefolloving:

a.TripbothRCPs.b.GotoStep12toinitiatebleedandfeedcooling.

Ilei+4vtif,Wei8i~A EOP:FR-H.1T!TLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE5of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED3TrytoEstablish AFWFlowToAtLeastOneS/G:a.CheckMCBindications forcauseofAFWfailure:1)VerifyCSTlevel-GREATERTHAN5FEET2)Verifybussessupplying powertoMDAFVpumps-ENERGIZED

~Bus14~Bus163)CheckAFVvalvealignment oAFWpumpdischarge valvesOPEN~MOV-4007~MOV-4008~MOV-3996oTDAFWpumpflowcontrolvalves-OPEN~AOV-4297~AOV-4298b.CheckAFVpumps-ALLRUNNINGc.ChecktotalflowtoS/Gs-GREATERTHAN200GPMd.Returntoprocedure andstepineffect1)RefertoER-AFV.1, ALTERNATE WATERSUPPLYTOAFVPUMPS.2)ContinueattemptstorestorepowertoMDAFWpumps.3)DispatchAOtolocallyalignvalvesasnecessary.

b.Performthefollowing:

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

~MOV-3505A 3)Ifnecessary dispatch"AOtolocallyresetTDAFWpumpgovernorvalve.c.ContinueattemptstorestoreAFWflowandgotoStep4.

~~

EOP:FR-H.1TITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE6of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED4StopBothRCPs

~rI EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE7of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFOFFSITEPOWERISLOSTAFTERSIRESET,SELECTEDSWPUMPSANDONECCWPUMPVILLAUTOSTARTONEMERGENCY D/G.MANUALACTIONVILLBEREQUIREDTORESTARTSAFEGUARDS EQUIPMENT.

5TryToEstablish MFWFlowToAtLeastOneS/G:a.CheckanyMFWpump-AVAILABLE b.Checkcondensate system:oCondensate pump-ANYRUNNINGoMFVpumpsuctionpressure-GREATERTHAN185PSIGc.ResetSIifnecessary d.Establish MFWflow:1)CheckMFWpumpdischarge valves-CLOSED2)VerifyMFWflowcontrolbypassvalve-OPERABLE3)DispatchAOtorestoreMFVpumpSVcooling4)VerifyS/GblowdownkeyswitchesinNORMAL5)EnsureoneMFVpumprecircvalve-OPEN6)StartselectedMFVpump7)OpenMFVpumpdischarge valve8)OpenMFVflowcontrolbypassvalvesasnecessary torestoreS/Glevele.GotoStep10a.GotoStep6.b.IFoffsitepoweravailable, THENtrytoplacecondensate systeminservice.IFNOT,THENgotoStep6.d.IFMFVflowcanNOTbeestablished, THENgotoStep6.

I'\'1qgJo EOP:FR-H.lTITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE8of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED6Establish SAFWFlow:a.Performthefollowing:

1)AlignSAFVsystemforoperation (RefertoAttachment SAFV)2)StartbothSAPVpumps3)VerifySAPVtotalflow-GREATERTHAN200GPMa.IFgreaterthan200gpm,totalSAFWflowcanNOTbeestablished, THENgotoStep7.b.GotoStep10***************,.**************************CAUTIONIFVIDERANGELEVELINBOTHS/GSDECREASES TOLESSTHAN35INCHES[100INCHESADVERSECNMT]ORIPPRZRPRESSUREINCREASES TOGREATERTHAN2335PSIGDUETOLOSSOFHEATSINK,THENSTEPS12THROUGH14SHOULDBEIMMEDIATELY INITIATED PORBLEEDANDFEED.7CheckCondensate Pumps-ANYRUNNINGrIFoffsitepoweravailable, THENmanuallystartatleastonecondensate pump.IFacondensate pumpcanNOTbestarted,THENgotoStep11.

F~w.41'I EOP:FR-H.1TITLE:RESPONSETOLOSS"'OFSECONDARY HEATSINKREV10PAGE9of26STEPACTION/EXPECTED RESPONSE'ESPONSE NOTOBTAINEDEstablish Condenser SteamDumpPreSsureControl:a.Verifycondenser available:

oAnyMSIV-OPEN'oAnnunciator G-15,STEAMDUMP-LITa.PlaceS/GARVcontrollers inAUTOatdesiredpressureandgoto,Step9.b.Adjustcondenser steamdumpcontroller HC-484todesiredpressureandverifyinAUTOc.PlacesteamdumpmodeselectorsvitchtoMANUAL l~h~~I1 EOP:FR-H.lTITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE10of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED***************"**************************CAUTIONFOLLOWING BLOCKOFAUTOMATIC SIACTUATION, MANUALSIACTUATION MAYBEREQUIREDIFCONDITIONS DEGRADE.NOTE:Ifauxiliary sprayisinuse,sprayflowmaybeincreased byclosingnormalchargingvalveAOV-294andnormalPRZRsprayvalves.9TryToEstablish FeedFlowFromCondensate System:a.Establish condensate flowpath(RefertoAttachment CONDTOS/G)b.Depressurize RCStolessthan1950psig:1)Deenergize PRZRheaters2)Checkletdown-INSERVICE3)Depressurize usingauxiliary sprayvalve(AOV-296) c.WHENRCSpressurelessthan1950psig,THENperformthefollowing:

1)BlockSI2)Dumpsteamtocondenser atmaximumratetodepressurize atleastoneS/Gtolessthan380psigd.Verifycondensate flowtoS/Gsa.GotoStep11.2)UseonePRZRPORV.IFIANOTavailable, THENrefertoAttachment N2PORVS.IFPORVNOT'available, THENuseauxiliary sprayvalve,AOV-296andgotoStep9c.2)ManuallyorlocallydumpsteamusingintactS/GARV.d.GotoStep11.

las EOP:FR-H.1RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE11of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED10CheckS/GLevels:a.NarrowrangelevelinatleastoneS/G-GREATERTHAN5%[25%adverseCNMT]b.Returntoprocedure andstepineffecta.IFfeedflowverified,to atleastoneS/G,THENmaintainflowtorestorenarrowrangelevelgreaterthan5%[25%adverseCNMT].IFNOTverified, THENgotoStep11.11VerifySecondary.

HeatSink:a.Checkthefollowing:

oEitherS/Glevel-WIDERANGEGREATERTHAN'35inches[100inchesadverseCNMT]oPRZRpressure-LESSTHAN2335PSIGb.ReturntoStep1a.IFlossofheatsinkisindicated, THENperformthefollowing:

1)TripbothRCPs.2)GotoStep12toinitiatebleedandfeedcooling.*****************************************

CAUTIONSTEPS12THROUGH14MUSTBEPERFORMED QUICKLYINORDERTOESTABLISH RCSHEATREMOVALBYRCSBLEEDANDFEED.cA'***4****4*4*******************4

            • 12ActuateSIandCI I>A*~4$P~

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE12of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONWHENBASTLEVELDECREASES TO10X,THENSIPUMPAUTOMATIC SWITCHOVER TORWSTSHOULDBEENSURED.13Vex'ifyRCSFeedPath:a.CheckSIpumps-ATLEASTONERUNNINGb.Checkvalvealignment foroperating SIpumps-PROPEREMERGENCY ALIGNMENT Manuallystartpumpsandalignvalvesasnecessary toestablish RCSfeedpath.IPafeedpathcanNOTbeestablished, THENcontinueattemptstoestablish feedflow.ReturntoStep3.14Establish RCSBleedPath:a.OpenbothPRZRPORVblockvalvesa.EnsurepowertoMCCssupplying blockvalves.~MCCCforMOV-515~MCCDforMOV-516b.PlacebothPRZRPORVswitchestoOPENXPanyblockvalvecanNOTbeopened,THENdispatchAOtolocallycheckbreaker:~MOV-515,MCCCposition6C~MOV-516,MCCDposition6Cc.AlignRCSoverpressurization nitrogensystemtoopenbothPRZRPORVs(RefertoAttachment N2PORVS)c.'PBOTHPRZRPORVscanNOTbeopened,THENperformthefollowing:

1)EnsurebothPORVswitchesinOPEN.2)GotoStep15.

I)c4,rII EOPDFR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE13of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFOFFSITEPOWERISLOSTAFTERSIRESET,SELECTEDSWPUMPSANDONECCVPUMPVILLAUTOSTARTONEMERGENCY D/G.MANUALACTIONVILLBEREQUIREDTORESTARTSAFEGUARDS EQUIPMENT.

15CheckIfSICanBeReset:a.Checkthefollowing:

oPRZRpressure-LESSTHAN1750PSIG-OR-oEithersteamline pressure-LESSTHAN514PSIGb.ResetSIa.IFPRZRpressurestableorincreasing, THENresetSIandgotoStep16.IFPRZRpressuredecreasing, THENperformthefollowing:

1)VHENPRZRpressurelessthan1750psig,THENresetSI.2)GotoStep16.16ResetCI:a.DepressCIresetpushbutton b.Verifyannunciator A-26,CONTAINMENT ISOLATION-EXTINGUISHED b.Performthefollowing:

1)ResetSI.2)DepressCZresetpushbuttou I~~ll EOPFR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE14of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED17VerifyAdequateSWFlow:a.VerifyatleasttwoSWpumps-RUNNINGb.VerifyAUXBLDGSWisolation valves-ATLEASTONESETOPEN~MOV-4615andMOV-4734~MOV-4616andMOV-4735a.Manuallystartpumpsaspowersupplypermits(258kweach).IPlessthantwoSWpumpscanbeoperated, THENgotoStep20.b.Establish SWtoAUXBLDG(RefertoAttachment AUXBLDGSW).

a<<Cj1' EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE15of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED18Establish IAtoCNMT:a.Verifynon-safe'guards bussesenergized fromoffsitepoweroBus13normalfeed-CLOSED-OR-oBus15normalfeed-CLOSEDb.VerifyturbinebuildingSWisolation valves-OPEN~MOV-4613andMOV-4670~MOV-4614andMOV-4664c.Verifyatleasttwoaircompressors

-RUNNINGd.ChecklAsupply:oPressure-GREATERTHAN6OPSIGoPressure-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)ContinuewithStep20.WHENIArestored, THENdoSteps18e,fand19.

~il~V)P~pl*C.

EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE16of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED19RestoreRCSOverpressurization NitrogenSystemToStandby:a.Verifyinstrument busD-ENERGIZED b.PlacereliefvalvePC-431andPC-430armingswitchestoBLOCK~SOV-8619A

~SOV-8619B a.Performthefollowing:.

1)EnsuresteamdumpmodecontrolinMANUAL.2)Restorepowertoinstrument busDfromMCCBorMCCA(maintenance supply).c.CloseSURGETKVLVs~SOV-8616A

~SOV-8616B NOTE:PRZRPORVsmay"losetemporarily untiladequateIApressureisrestoredinCNMT.20VerifyAdequateRCSBleedPath-BOTHPRZRPORVSOPENIRPRZRPORVscanNOTbeopened,THENperformthefollowing:

a.OpenRxvesselheadvents.~SOV-590'SOV-591~SOV-592~SOV-593b.Depressurize atleastoneintact*S/Gtoatmospheric pressureusingS/GARV.c.Alignanyavailable lowpressurewatersourcetothedepressurized S/Gs.

r

(~EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE17of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONTHERCSBLEEDPATHMUSTBEMAINTAINED EVENIFRCSPRESSUREREMAINSGREATERTHANSIPUMPSHUTOFFHEAD.~N*********~***********~*****************21MaintainRCSHeatRemoval:oMaintainSIflowoMaintainbothPRZRPORVsandblockvalves-OPEN22CheckNormalPowerAvailable ToChargingPumps:oBus14normalfeedbreaker-CLOSEDoBus16normalfeedbreaker-CLOSEDVerifyadequateemergency D/Gcapacitytorunchargingpumps(75kweach).IFNOT,THENevaluateifCNMTRECIRCfanscanbestopped(RefertoAttachment CNMTRECIRCFANS).

A EOP:FR-H.1TITLERESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE18of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED2FCheekIfChargingFlowHaeBeenEstablished:

a.Chargingpumps-ANYRUNNINGb.AlignchargingpumpsuctiontoRWST:oLCV-112B-OPENoLCV-112C-CLOSEDa.Performthefollowing:

1)IRCCWflowislosttoanyRCPthermalbarrierORanyRCPflsealoutlettemperature offscalehigh,THENdispatchAOwithkeytoRWSTgatetolocallyclosesealinjection needlevalve(s)toaffectedRCP:~RCPA,V-300A~RCPB,V-300B2)EnsureHCV-142open,demandatOX.b.IRLCV-112BcanNOTbeopened,THENperformthefollowing:

1)VerifychargingpumpANOTrunningandplaceinPULLSTOP.2)DispatchAOtolocallyopenmanualchargingpumpsuctionfromRWST(V-358locatedinchargingpumproom).c.Startchargingpumpsasnecessary andestablish maximumchargingflow3)WHENV-358open,THENdirectAOtocloseV-268toisolatechargingpumpsBandCfromVCT(V-268locatedinchargingpumproom).

faI,Q'I(t1 EOP:FR-H.lTITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE19of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONoIFRWSTLEVELDECREASES TOLESSTHAN28X,THENTHESISYSTEMSHOULDBEALIGNEDFORCOLDLEGRECIRCULATION USINGSTEPS1THROUGH13OFES-1.3,TRANSFERTOCOLDLEGRECIRCULATION.

oIFCONTAINMENT PRESSUREINCREASES TOGREATERTHAN28PSIG,CONTAINMENT SPRAYSHOULDBEVERIFIED.

24ContinueAttemptsToEstablish Secondary HeatSinkInAtLeastOneS/G:~AFWflow~MainFWflow~StandbyAFWflow~Condensate flow25CheckForAdequateSecondary HeatSink:a.ChecknarrowrangelevelinatleastoneS/G-GREATERTHAN5X[25XadverseCNMT]b.AdjustS/GARVcontrollers toexistingS/Gpressurea.ReturntoStep24.

4P@elg;g4~4 EOP:FR-H.lTITLERESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE20of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONIFTHERCSISWATERSOLID,THENANYINCREASEINRCSTEMPERATURE MAYRESULTINASIGNIFICANT RCSPRESSUREINCREASE.

RCSHEATUPSHOULDBEPREVENTED.

C26MonitorRCSTemperatures:

oCoreexitT/Cs-DECREASING oRCShotlegtemperatures-DECREASING Performthefollowing:

a.Controlsteamdumpandfeedflowtoestablish naturalcirculation andstabilize RCStemperature.

b.ReturntoStep24.27CheckCCWPumps-ANYRUNNINGPerformthefollowing:

a.IFanyRCP$1sealoutlettemperature offscalehigh,THEN.isolateCCWtothermalbarrierofaffectedRCP(s).+RCPA,MOV-749AandMOV-759A~RCPB,MOV-749BandMOV-759Bb.ManuallystartoneCCWpump(1241').

EOP:FR-H.1TiTLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE21of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED***************************************'**CAUTION,IPRCSISSOLID,THENTERMINATION OFFEEDANDBLEEDMAYRESULTINRAPIDRCSPRESSUREINCREASEUNLESSRCSINFLOWANDOUTFLOWARECAREFULLY CONTROLLED.

28CheckIfOneOfThreeSIPumpsShouldBeStopped:a.ThreeSIpumps-RUNNINGb.RCSsubcooli'ng basedoncoreexitT/Cs-GREATERTHAN35'P[90'FadverseCNMT]USINGPIGUREMINSUBCOOLING c.CheckPRZRlevel-GREATERTHAN13X[40XadverseCNMT]d.StoponeSIpumpa.GotoStep29.b.Checkthefolloving:

oRCSpressuregreaterthan1625psig[1825psigadverseCNMT]oRCSsubcooling basedoncoreexitT/CsgreaterthanO'usingFigureMINSUBCOOLING IPNOT,THENgotoStep"31.c.DoNOTstopSIpump.GotoStep31.

IIar~0>>Vl,b EOP:FR-H.1TITLE:RESPONSETOL'OSSOFSECONDARY HEATSINKREV:10PAGE22of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED29CheckIfOneOfTwoSIPumpsShouldBqStopped:a.TwoSIpumps-RUNNINGb.Determine requiredRCSsubcooling fromtable:a.GotoStep30.ChargingPumpAvailability NONEONETVOTHREERCSSubcooling Criteria120'F[200'PadverseCNMT]115'F[190'PadverseCNMT]105'F[180'FadverseCNMT]100'F[175'PadverseCNMT]c.RCSsubcooling basedoncoreexitT/Cs-GREATERTHANVALUEPROMTABLEABOVEUSINGPIGUREMINSUBCOOLING d.PRZRlevel-GREATERTHAN13K[40XadverseCNMT]e.StoponeSIpumpc.Checkthefollowing:

oRCSpressuregreaterthan1625psig[1825psigadverseCNMT]oRCSsubcooling basedoncoreexitT/CsgreaterthanO'PusingFigureMINSUBCOOLING IFNOT,THENgotoStep31.d.DoNOTstopSIpump.GotoStep31.

~j'4'Cl EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE23of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED30CheckIfLastSIPumpShouldBeStopped:a.OneSIpump-RUNNINGb.Checkthefollowing:

oRCSsubcooling basedoncoreexitT/CsgreaterthanO'usingFigureMINSUBCOOLING oRCSpressuregreaterthan1625'sig[1825psigadverseCNMT]c.PRZRlevel-GREATERTHAN13X[40XadverseCNMT]d.StoprunningSIpumpe.GotoStep32a.GotoStep32.b.GotoStep31.c.DoNOTstopSIpump.GotoStep31.

IJhr-EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE24of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINEDNOTE:AfterclosingaPORV,ltmaybenecessary towaitforRCSpressuretoincreasetopermitstoppingSIpumpsinSteps28,29and30.31CheckPRZRPORVStat;us:a.PRZRPORVs-ANYOPENb.PRZRPORVs-BOTHOPENa.CloseanyopenRxvesselhead'entvalvesandgotoappropriate plantprocedure:

oIFRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARYCOOLANT, Stepl.-OR-oIFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION, Stepl.b.IFPRZRlevelgreaterthan75%(65%adverseCNMTJ,THENperformthefollowing:

1)Establish excessletdownasfollows:oPlaceAOV-312toNORMAL.oEnsureCCWpumprunning.oEnsureCCWfromexcessletdownHxopen(AOV-745).

oOpenexc'essletdownisolation valveAOV-310.ThisStepcontinued onthenextpage.oSlowlyopenHCV-123.2)Stopallbutonechargingpumpanddecreasechargingflowtoasnecessary tocontrol-RCS pressure.

I1l EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE25of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED(Step31continued frompreviouspage)c.CloseoneopenPRZRPORVc.ClosePORVblock'valve.IPblockvalvecanNOTbeclosed,THENgotoappropriate plantprocedure:

oIPRWSTlevelgreaterthan28%,THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT,Stepl.-OR-oIFRWSTlevellessthan28%,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION, Stepl.d.ReturntoStep28******k**********************************CAUTIONIPRCSISSOLED,CLOSUREOFPORVSWILLRESULTINRAPIDRCSPRESSUREINCREASEUNLESSRCSINPLOWANDOUTPLOWARECAREFULLY CONTROLLED.

'I32CheckPRZRPORVsAndRxVesselHeadVentValves-ALLCLOSEDCloseallPRZRPORVsandRxvesselheadventvalves.IPanyPRZRPORVcanNOTbeclosed,THENmanuallycloseitsblockvalve.

1kfWl EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE26of26STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED33CheckIfRHRPumpsShouldBeStopped:a.CheckRCSpressure:

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

oIFRWSTlevelgreaterthan28X)THENgotoE-l,LOSSOFREACTORORSECONDARY COOLANT,Stepl.-OR-b.StopRHRpumpsandplaceinAUTOoIFRWSTlevellessthan28X)THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION)

Step1.34StartChargingPumpsAsNecessary AndControlChargingFlowToMaintainPRZRLevel35GoToES-1.1)SITERMINATION)

Step8-END-IA0 EOP:FR-H.1TITLE:RESPONSETOLOSSOFSECONDARY HEATSINKREV:10PAGE1of1FR-H.1APPENDIXLISTTITLEPAGES1)FIGUREMINSUBCOOLING 2)ATTACHMENT CNMTRECIRCFANS3)ATTACHMENT CONDTOS/G4)ATTACHMENT N2PORVS5)ATTACHMENT SD-16)ATTACHMENT RHRCOOL7)ATTACHMENT SAFW8)ATTACHMENT AUXBLDGSW Tl4.'I EOP:FR-H.lTITLERESPONSETOLOSSOFSECONDARY HEATSINKREV10PAGE1of1FIGUREMINSUBCOOLING NOTE:Subcooling Margin=Saturation Temperature FromFigureBelow[-]CoreExitT/CIndication RC250024002300220021002000190018001700~1600140013001200110010009008007006005004003002001000SPRESSURE(PSIG)RCSPRESSUREINCREMENTS 20PSIGSUBCOOLED REGIONECNMTADVERSNORMALCNMTINADEQUATE SUBCOOLING REGIONTEMPERATURE INCREMENTS 10'F200250300350400450500550600650700COREEXITSATURATION TEMPERATURE

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