ML17320B075

Proposed Tech Spec Changes Re Addl Limitation on Nuclear Enthalpy Rise Hot Channel Factor Due to New Loca/Eccs Analysis in Support of Cycle 5 Reload

ML17320B075
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Site:	Cook
Issue date:	05/21/1984
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
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ML17320B074	List: ML17320B073 ML17320B075
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NUDOCS 8405290296
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Table2.1O.C.CookUnit2l.OCA/ECCSAnalysisSu@naryResultsfortheCcle5CoreConfiuration85$ENCFuelPeakRodAverage8urnup(HMD/kg)FTQTPeakCladdingTemperature(oF)MaximumLocalEr-H20Reaction(5)TotalZr-H20Reaction2.02.041.41521987.4<1.010.02.041.41521907.3<1.047.02.041.415'20965.7(1.0:g4OS2eO29GSOOOSfb""'g@40521'",<<,",'",.),,pgp'PDGCK,,pGp'..',:p~

~~i-1p'llL'i1 Table3.21.0DECLGBreakAnalysisParametersPeakRodAverageBurnup(HID/kg)TotalCorePower(NMt)*TotalPeaking(F~)TFractionEnergyDepositedinFuel~FullyModeratedCore~VoidedCore2.034112.040.9740.95410.034112.040.9740.95447.034112.040.9740.954Ccle585%ENCFuel)Peaking~AxialxEngineering~EnthalpyRise(F~H)T1.4421.4151.4421.415l.4421.415*2%poweruncertaintyisaddedtothisvalueintheLOCAanalysis.

Table3.41.0DECLGBreakFuelResponseResultsforCycle5PeakRodAverageBurnup(NMD/kg)InitialPeakFuelAverageTemperature(oF)HotRodBurst~Time(sec)~Elevation(ft)~ChannelBlockageFractionPeakCladTemperature~Time(sec)~Elevation(ft)~Temperature(oF)Zr-SteamReaction~LocalMaximumElevation(ft)~LocalMaximum(g)*~CoreMaximum2.0215160.96.50.242278.6321988.637.4<1.010.0206061.76.50.272278.6321903.637.3<1.047.0162967.97.00.472418.8820968.885.7<1.0*Values400secintoLOCAtransient.

iFQ~2-0IiF~1.<150RePNQO/KGPCTHODE(HOOE14ATI.CtFT.lt-RLN'THEOHOOE(HOOE5ATC.$0FT-)IClClgQ,~d44.0e0.0Lt0.01400t000t)00tt04TIHE-SE'CONDS%0.0)Cl.~Fiqure3.41TOODEE2CladdingTemperatureversusTime,1.0DECLGBreak,2.MWD/KgCase iFQ~R,.04iFOH~1'15DRi17HW/K1.PCTHODEtNOK1$ATl.lfFT.)t.MTQKt)NSEtHOOEu.AT1.00FT)44.0t0.0tt0.0iC0.05$.0t.td0TIHE'SECONDSS0.0050Xb.~ci~nr~l4RTOODEE2CladdinoTemperatureversusTime,1.0DECLGBreak,47.MWD/KgCase

>FW2.04oFOWl.<150Ro10HNOIK1..PCTNHKfNODE19ATa.etFT.)t-RLPTllKDt400E(HATE0AT0.$0FT.)i0.0e0.41t0.0140.0'O0.0t40.0TINE-SECONDStl0.4KJt.0~-~Figure3.42TOODEE2CladdingTemperatureversusTime,1.0DECLGSreak,10.NWD/KgCase Mr.Haro1dR.Den<<4AEP:NRC:0860KATTACHMENT2PROPOSEDREVISIONTOTECHNICALSPECIFICATIONPAGES CSFLORATEANDNUCEARENTYE00ERATIO3.2.3ThecombinationofindicatedReactorCoolantSystem(RCS)totalflowrateandRshallbemaintainedwithintheregionofallowableoperationshownonFigures3.2-4and3.2-5for4and3loopoperation,respectively.For:WestinghouseFuelNAHR-"-f1.48[1.0+0.2(1.0-P)]for:ExxonNuclearCompanyFuelNWWWWO~WW&W&W&WWWWWWWWOWWWWR=1.49[1.0+0.2(1.0-P)]And,F<H51.36/PforExxonNuclearCompanyFuelNwhere:RATEDTHERMALPOWERandFAHN=measuredvaluesofF<obtainedbyusingthemovableNincoredetectorstoob$ainapowerdistributionmap.ThemeasuredvaluesofF~andflow,withoutadditonaluncertaintyallowance,shallbeusedtocomparewithlimits.fZZLIQAPXJJX'QXXQKMODE1.NWithFAHabovetheallowablelimitorwiththecombinationofRCStotalflowrateandRoutsidetheregionofacceptableoperationshownonFigure3.2-4or3.2-5(asapplicable):a~Within2hours:l.EitherrestoreFAandthecombinationofRCStotalflowNrateandRtowithPntheabovelimits,or2.ReduceTHERMALPOWERtolessthan50$ofRATEDTHERMALPOWERandreducethePowerRangeNeutronFlux-HightripsetpointtoJ55$ofRATEDTHERMALPOWERwithinthenext4hours.D.C,COOK-UNIT23/42-9AMENDMENTNO.

kGXZQK:(Continued)b.Within24hoursofinitiallybeingoutsidetheabovelimits,verifythroughincorefluxmapp1ngandRCStotalflowratecompar1aonthatF$EandthecomhinatlonofRandROEtotalflowratearerestored%owithintheabovelimits,orreduceTHERMALPOWERtolessthan5$ofRATEDTHERMALPOWERwithinthenext2hours.c~Identifyandcorrectthecauseoftheout-of'-limitconditionpriortoincreasingTHERMALPOWERabovethereducedTHERMALPOWERLimitrequiredbyACTIONitemsa.2and/orbabove;subsequentPOWEROPERATIONmayproceedprovfdedthatF)andthecombinationofRandindicatedRCStotalflowratearedemonstrated,throughincorefluxmappingandRCStotalflowratecomparison,tobewithinthereg1onofacceptableoperationasdefinedaboveforF"andasshownonFigure3.2-4or3.2-5(asapplicable)forRCSflowrateandRpriortoexceed1ngthefollowingTHERMALPOWERlevels:1.Anominal501ofRATEDTHERMALPOWER,2.Anominal75$ofRATEDTHERMALPOWER,and3.Within24hoursofattainingg954ofRATEDTHERMALPOWER.4.2.3.1TheprovisionsofSpecif1cation4.0.4arenotapplicable.N'.2.3.2F<HshallbedeterminedtobewithintheabovelimitsandthecombinationofindicatedRCStotalflowrateandRshallbedeterminedtobewithintheregionofacceptableoperationofFigure3.2-4or3.2-5(asapplicable):a.Priortooperat1onabove75$ofRATEDTHERMALPOWERaftereachfuelloading,andb.Atleastonceper31EffectiveFullPowerDays.4.2.3.3TheRCStotalflowrateindicatorsshallbesub)ectedtoaCHANNELCALIBRATIONatleastonceper18months.4.2.3.4TheRCStotalflowrateshallbedeterminedbymeasurementatleastonceper18months.D.C.COOK-UNIT23/42-10AMENDMENTNO.

~~4846eMeasurementUncertaintiesof3.5%forFlo~and4%FJHareaccountedforintheanalysiswhichsupportsthisFigure.4442C)440[ACCEPTABLEOPERATIONREGION~~~=-=--=-'=-:-UNACCEPTABLEOPERATIONREGION(0.3=,:i.77).340.900.940.981.021.06R*F~NH/1.48[1.0+0.2(l.0-P)lWESTINGHOUSEFUELR*FNH/1.49{1.00.2(1.0-P)]EXXONNUCLEARCO.FUEFIGURE3.24RCSTOTALFlO'NRATEVERSUSRFOURLOOP5INOPERATIONa~a<0.C.COOKUNIT23/42-11AmendmentNo.~~

~~3634XCL,CD32'HtasureaentUnclrtalnt)es:.'of3.5%forFlowandi%..<orFareaccountedfor.:intheanalysiswhich,supportsthisFigure.0~~A~ACCEPTAgLEOPERATIONREGION~~~Ktshouldbenotedthatthreeloooooerat'onusingthiscurseisnotcurrenlyallowedNechangescontainedinthistableareforReferenceonly.~Ii~~~~C730IC)28(~UNACCEPTAgLE~OPERAT'ON~'"IGt'~','..0,27.13)Z6=::.(0.971,26.'.=.)240.900.940.981.021.061.1014R<F"H/l.48{1.0+0.2(1.0-P)]MESNGHOUSEFUELR*F"H/1.49{1.0+0.2(I.O-P)]EXXONNUCLEARCO.FUELFIGURE3.2-5RCSTOTALFLOQRATEVERSUSR-THREELOOPSINOPERATION0.C.COOKUNIT23/42-12Apgn4nentNo.

Thecurvesarebasedonanuclearenthalpyrisehotchannelfactor,p,ori.49andareferencecosinewithapeakoft.55i'oraxialpowershape.AnallowanceisincludedforanincreaseinF<HatreducedpowerbasedAH'ntheexpression:F>H-1.48[1+0.2(1-P)](WestinghouseFuel)F<H=1.49[1+0.2(1-P)](ExxonNuclearCompanyFuel)NwherePisthefractionofRATEDTHERMALPOWER.Theselimitingheatfluxconditionsarehigherthanthosecalculatedfortherangeofallcontrolrodsfullywithdrawntothemaximumallowableoontrolrodinsertionassumingtheaxialpowerimbalanceiswithinthelimitsofthef(AI)functionoftheOvertemperaturetrip.Whentheaxialpowerimbalanceiknotwithinthetolerance,theaxialpowerimbalanceeffectontheOvertemperatureATtripswillreducethesetpointstoprovideproteotionconsistentwithcoresafetylimits.ForExxonNuclearCompanysuppliedfuel,anadditionallimitationonF<isappliedtoensurecompliancewithECCSacceptancecriteria.Thislimitationisdiscussedinbasissection3/4.2.2and3/4.2.3anddoesnotaffectthesafetylimitcurve.2.1.20CTherestrictionofthisSafetyLimitprotectstheintegrityoftheReactorCoolantSystemfromoverpressurizationandtherebypreventsthereleaseofradionuclidescontainedinthereactorcoolantfromreachingthecontainmentatmosphere.ThereactorpressurevesselandpressurizeraredesignedtoSectionIIIoftheASMECodeforNuclearPowerPlantwhichpermitsamaximumtransientpressureof110$(2735psig)ofdesignpressure.TheReactorCoolantSystempiping,valvesandfittings,aredesignedtoANSIB31.11967Edition,whichpermitsamaximumtransientpressureof120%(2985psig)ofcomponentdesignpressure.TheSafetyLimitof2735psigisthereforeconsistentwiththedesigncriteriaandassociatedcoderequirements.TheentireReactorCoolantSystemishydrotestedat3107psig,125$of'designpressure,todemonstrateintegritypriortoinitialoperation.D.C.COOK-UNIT2B2-2AMENDMENTNO.

Thespecificationsof'hissectionprovideassuranceoffuelintegrityduringConditionI(NormalOperation)andII(IncidentsofModerateFrequency)eventsby:(a)maintainingthecalculatedDNBRinthecoreatorabovedesignduringnormaloperationandinshorttermtransients,and(b)limitingthefissiongasrelease,fuelpellettemperatureandoladd1ngmechan1calpropertiestowithinassumeddesigncriteria.Inadd1tion,limitingthepeaklinearpowerdensitydur1ngConditionIeventsprovidesassurancethattheinitialcond1t1onsassumedf'rtheLOCAanalysesaremetandtheECCSacceptancecriterialimitof2200Fisnotexceeded.Thedefinitionsofcertainhotohannelandpeakingfactorsasusedinthesespecificationsareasfollows:F(Z)HeatFluxHotChannelFactor,isdefinedasthemaximumlocalheatfluxonthesurfaceof'fuelrodatcoreelevationZdividedbytheaveragefuelrodheatflux,allowingformanufacturingtolerancesonfuelpelletsandrods.NFAHNuclearEnthalpyRiseHotChannelFaotor,isdefinedastheratiooftheintegraloflinearpoweralongtherodwiththehighestintegratedpowertotheaveragerodpower.NThelimitsonF(Z)andF<forWestinghousesuppliedfuelatacore-averagepowerof3431MWtare1.$7and1.48,respectively,whichassureconsistencywiththeallowableheatgenerationratesdevelopedforacoreaveragethermalpowerof3391MWt.ThelimitsonF(Z)andF".forENCsuppliedfuelhavebeenestablishedforgcorethermalpoweroP3411MWt.ThelimitonF(Z)is2.04.ThelimitonF>is1.36forLOCA/ECCSanalysisand1.49forDIIBanalyses.TheanalysessupportingtheExxonNuclearCompanylimitsarevalidforanaveragesteamgeneratortubepluggingofupto5$andamax1mumpluggingofoneormoresteamgeneratorsofupto10$.Inestablishingthelimits,aplantsystemdescriptionwithimprovedaccuracywasemployedduringtherefloodportionoftheLOCATransient.WithrespecttotheWestinghousesuppliedfueltheminimumproJectedexcessmarginofatleast10$toECCSlimitswillmorethanoffsettheimpactofincreasesteamgeneratortubeplugging.ThelimitsonAXIALFLUXDIFFERENCEassurethattheF(Z)upperboundenvelopeisnotexceededduringeithernormaloperationoFintheeventofxenonredistributionfollowingpowerchanges.TheF(Z)upperboundenvelopeis1.97timestheaveragefuelrodheatfluxforWeslinghousesuppl1edfueland2.04t1mestheaveragefuelrodheatfluxforExxonNuclearCompanysuppliedfuel.Targetfluxdifferenceisdeterminedatequilibriumxenonconditions.Thefulllengthrodsmaybepositionedwithinthecoreinaccordancewiththeirrespectiveinsertionlimitsandshouldbeinsertednearthe1rnormalposit1onforsteadystateoperationathighpowerlevels.ThevalueoftheD.C.COOK-UNIT2B3/42-1AMENDMENTNO.

2HEATLOTCTOThelimitsonheatfluxhotchannelfactor,RCSflowrate,andnuclear,enthalpyrisehotchannelfactorensurethat1)thedesignlimitsonpeaklocalpowerdensityandminimumDNBRarenotexceededand2)$ntheeventofaLOCAthepeakfuelcladtemperaturewillnotexceedthe2200FECCSacceptancecriterialimit.EachoftheseismeasurablebutwillnormallyonlybedeterminedperiodicallyasspecifiedinSpecifications0.2.2and4.2.3.Thisperiodicsurveillanoeissufficienttoensurethatthelimitsaremaintainedprovided:a.Controlrodsinasinglegroupmovetogetherwithnoindividualrodinsertiondifferingbymorethan+12stepsfromthegroupdemandposition.b.ControlrodgroupsaresequencedwithoverlappinggroupsasdescribedinSpecification3.1.3.6.c.ThecontrolrodinsertionlimitsofSpecifications3.1.3.5and3.1.3.6aremaintained.d.AnditionallimitationonF<appliestoExxonNuolearCompanyfuel.NThisF<Hlimit,incombinationwitktheF~(Z)limit,ensurescompliancewiththeECCSacceptancecriteria.AnallowanceisincludedforanincreaseinF<Hatreducedpowerbasedonthefollowingexpression:NTheaxialpowerdistribution,expressedintermsofAXIALFLUXDIFFERENCE,ismaintainedwithinthelimits,NF<Hwillbemaintainedwithinitslimitsprovidedoonditionsa.throughd.abovearemaintained.AsnotedonFigures3.2-4and3.2-5,RCSflowrateandF<maybe"tradedoff"againstoneanother(i.e.,alowmeasuredRCSflowra@isacceptableifthemeasuredF<isalsolow)toensurethatthecalculatedDNBRwillnotbebelowthebesignDNBRvalue.TherelaxationofF<HasafunctionofTHERMALPOWERallowschangesintheradialpowershapeforallpermissiblerodinsertionlimits.TheformofthisrelaxationforDNBRlimitsisdiscussedinSection2.1.1ofthebasis.F<Ng1.36/P(ExxonNuclearCompanyFuel)where:PisthefractionofRATEDTHERMALPOWER.Thepowerdependenceofthisallowanceis1/PbecausetheassooiatedF<Hlimitof136resultsfromtheLOCAanalysis.ThemorerestrictiveoftheflowdependentDNBRF<HlimitandtheLOCANF~limitforExxonNuclearFuelCompanyfuelmustbeapplied.D.C.COOK-UNIT2B3H2-4AMENDMENTNO.

RISER-(Continued)F~reB3/42-2illustratestheimplementat1onofthelimitsasafnctioofpower.AmeasuredflowwillresultinalimitingvalueforRwhichmustbeobtainedfromFigure3.2-4orFigure3.2<<5.FromthislimitingR,alimitingF<Hcanbeobtainedbecause:WestinghouseFuelF>H=1.48XRX[1.0+0.2(1.0-P)3,ExxonNuclearCompanyFuelFAH=1.49XRX[1.0+0.2(1.0-P)]Where:PTHERMALPOWERRATEDTHERMALPOWERFigureB3/42-2displaystwolimitiggDNBRFcurvesfearExxonNuclearNCompanyfuelforflowsof36.77X10cpm,an37.63X10gpm.AlsodisplayedonFigureB3/42-2isthelimitoqF<HwhichresultsfromtheLOCAanalys1si'orExxonNuclearCompanyfueQpmustbemaintaiydbelowandtotheleftofboththeapplicableDNBRF<HlmIItandtheLOCAF<Hlimit.ForWestinghousefuelthere1sonlyoneglimit.Itrustbeobtained-NfromtheapplicablerelationshipsamongR,F<H,P,andflow.WhenanFmeasurementistaken,bothexperimentalerrorandmanufacturingtolerancemustbeallowedfore5gistheappropriateallowanceforafullcoremaptakenwiththeincoredetectorfluxmappingsystemand3$istheappropriateallowanceformanufactur1ngtolerance.WhenRCSflowrateandF<aremeasured,noadditionalallowances.areNnecessarypriortocomparison4ththelimitsofSpecif1cat1on3.2.3.Measurementerrorsof3.5$forRCSflowtotalflowrateand4$forFN<HhavebeenallowedforindeterminationofthedesignDNBRvalueandinthedeterm1nationoftheLOCA/ECCSlimit.D.C.COOK-UNIT2B3/42-4aAMENDMENTNO.

0&&1.65&~&'.4~~-~~1.55&Opium+~~~&~I.35020406080PERCENTOFRATEDTHERMALPOWER100FIGUREB3/42-2ILLUSTRATIVEEXAMPLEOFF~HLIMITVERSUSPERCENTTHERMALPOWERFOREXXONFUELB3/42-4b