ML17331B064

Application for Amends to Licenses DPR-58 & DPR-74,modifying TS 3/4.5.1, Accumulators Such That TS More Consistent W/ New STS for Westinghouse Plants,Published by NRC as NUREG-1431

ML17331B064
Person / Time
Site:	Cook
Issue date:	11/12/1993
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	MURLEY T E NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17331B065	List: ML17331B064 ML17331B066
References
RTR-NUREG-1431 AEP:NRC:1186, NUDOCS 9311190285
Download: ML17331B064 (16)

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ACCEIEEDDOCUMENTDISUTIONSYSTEMREGU.LORYINFORMATIONDISTRIBUTSYSTEM(RIDS)ACCESSIONNBR:9311190285DOC.DATE:93/11/12NOTARIZED:YESDOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONMURLEY,T.E.DocumentControlBranch(DocumentControlDesk)

SUBJECT:

ApplicationforamendstolicensesDPR-58&DPR-74,modifyingTS3/4.5.1,"Accumulators"suchthatTSmoreconsistentw/newSTSfor,Westinghouseplants,publishedbyNRCasNUREG-1431.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTRgENCJSIZE:TITLE:ORSubmittal:GeneralDistributionID5NOTES:RECIPIENTIDCODE/NAMEPD3-1LAWETZEL,BCOPIESLTTRENCL1122RECIPIENTIDCODE/NAMEPD3-1PDCOPIESLTTRENCL11D(DINTERNAL:NRR/DE/EELBNRR/DRCH/HICBNRR/DSSA/SRXB-C/MDCBREGFILE01EXTERNAL:NRCPDR111111101111NRR/DORS/OTSBNRR/DSSA/SPLBNUDOCS-ABSTRACTOGC/HDS2NSIC1111111011DDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDtDTOTALNUMBEROFCOPIESREQUIRED:LTTR15ENCL13 IndianaMichi~PowerCompa~P.O.Box16631Columbus,OH43216AEP:NRC:1186DonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74TECHNICALSPECIFICATIONCHANGEREQUEST:ACCUMULATORSU.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555Attn:T.E.MurleyNovember12,1993

DearDr.Murley:

ThisletteranditsattachmentsconstituteanapplicationforamendmenttotheTechnicalSpecifications(T/Ss)fortheDonaldC.CookNuclearPlantUnits1and2.TheproposedchangesmodifyT/S3/4.5.1(Accumulators)suchthattheT/SismoreconsistentwiththenewStandardT/SsforWestinghouseplants,publishedbytheNRCasNUREG1431.AssociatedchangestothecorrespondingBasessectionarealsoproposed.Attachment1providesadetaileddescriptionoftheproposedchanges,thejustificationforthechanges,andourproposeddeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92.Attachment2containstheexistingT/Spagesmarkedtoreflecttheproposedchange,Attachment3containstheproposed,revisedT/Spages.ThissubmittalproposeschangestoUnit2T/Spage3/45-2.AnadditionalchangetothispagewasproposedinoursubmittalAEP:NRC:1181,datedApril16,1993.Webelievethattheproposedchangewillnotresultin1)asignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountofanyeffluentsthatmaybereleasedoffsite,or2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandbytheNuclearSafetyandDesignReviewCommittee.93i1190285..;PDR'DOCKP93iii2050003i5PDR.

Dr.T.E.Murley2-AEP:NRC:1186Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.J.R.PadgettoftheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.Thisletterissubmittedpursuantto10CFR50.30(b),and,assuch,anoathstatementisattached.E.E.FitzpaickVicePresidentdrAttachmentscc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspectorJ.R.Padgett COUNTYOFFRANKLINE.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingTECHNICALSPECIFICATIONCHANGEREQUEST:ACCUMULATORSandknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedandsworntobeforemethis~~dayof19NOTARPUBLICRITA0.HILLNOTARYPUBUC.STATEOFOHIO

'r~'ItIf.>14j1 ATTACHMENT1TOAEP:NRC:118610CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONS Attachment1toAEP:NRC:1186Page1I.DESCRIPTIONOFTHECHANGESWeproposetomodifyT/S3/4.5.1(Accumulators)forUnits1and2of,theCookNuclearPlantsuchthattheT/SrequirementsaremoreconsistentwiththosecontainedinthenewStandardT/SsforWestinghouseplantspublishedbytheNRCasNUREG1431.Thespecificproposedchangesareasfollows:A.ActionStatementsAspresentlywritten,ActionStatement(a)providesguidancetobefollowedifasingleaccumulatorisinoperable,exceptasaresultofaclosedisolationvalve.Thisactionstatementallowsonehourtorestoreaninoperableaccumulatortooperablestatus,ortheunitmustbeplacedinMode4withinthefollowing8hours(Unit1)or12hours(Unit2).ActionStatement(b)providestherequirementsforasingleaccumulatorinoperableduetoaclosedisolationvalve.Inthiscase,thevalveistobeimmediatelyopened',ortheunitplacedinMode3withinonehourandMode4withinthenext8hours(Unit1)or12hours(Unit2).WeproposetoreplacethepresentActionStatementsaandbwithnewactionstatements.1)ActionStatement(a)providesguidancetobefollowediftheaccumulatorboronconcentrationisnotwithintheT/Slimits.Seventy-twohoursareallowedtorestoretheboronconcentrationtowithinthelimits.Iftheconcentrationisnotrestoredwithinthetimelimit,theunitmustbeplacedinatleastMode3withinthenext6hoursandpressurizerpressurereducedbelow1,000psigwithinthefollow'ing6hours.B.2)ActionStatement(b)coversallotherinoperabilitiesofasingleaccumulator.WithanaccumulatorinoperableexceptasprovidedforinActionStatement(a),onehourisallowedtorestoretheaccumulatortooperablestatus.Iftheaccumulatorisnotrestoredtooperablestatuswithinonehour,theunitmustbeplacedinatleastMode3withinthenext6hoursandpressurizerpressurereducedbelow1,000psigwithinthefollowing6hours.SurveillanceRequirements1)T/S4.5.1.bcurrentlyrequiresthattheaccumulatorbeverifiedoperable:Atleastonceper31daysandwithin6hoursaftereachsolutionvolumeincreaseofgreaterthanorequalto1Xoftankvolumebyverifyingtheboronconcentrationoftheaccumulatorsolution.

Attachment1toAEP:NRC:1186Page2Weareproposingtomodifythissurveillancerequirementsuchthatitreadsasfollows:Atleastonceper31days,and,fortheaffectedaccumulator(s),within6hoursaftereachsolutionvolumeincreaseofgreaterthanorequalto1Xoftankvolume(thatisnottheresultofadditionfromtherefuelingwaterstoragetank)byverifyingtheboronconcentrationoftheaccumulatorsolution.2)Weareproposingtodeletesurveillancerequirement4.5.1.d,whichrequiresverificationatleastonceper18monthsthateachaccumulatorisolationvalveopensautomaticallyuponreceiptofasafetyinjectiontestsignal.3)ForUnit1T/S4.5.1.a.l,weareproposingtochangetheterm"waterlevel"to"containedboratedwatervolume".C.BasesWeareproposingtomodifytheBasessectiontoreflectthechangestotheactionstatementsdiscussedabove.ThediscussionregardingactionstatementsinthecurrentBasesreflectstreatmentofaclosedisolationvalveasaspecialconditionofinoperabilityrequiringimmediateaction.WeareproposingtomodifytheBasesdiscussiononactionstatementstoincludetheBasesmaterialfortheactionstatementsfromNUREG1431.II.REASONSANDJUSTIFICATIONFORPROPOSEDCHANGESIngeneral,theproposedchangesareintendedtomaketheT/SsmoreconsistentwiththenewStandardT/SspublishedasNUREG1431.TheproposedchangeseliminateinconsistenciesinthepresentT/Ss,relaxcertainrequirementswhereappropriate,andeliminateunnecessarysurveillancerequirements.ActionStatementsAninconsistencyinthepresentT/Shasbeeneliminatedwiththenewproposedactionstatements.T/S3/4.5.1isapplicableinModes1and2,andMode3withpressurizerpressureabove1,000psig.ThepresentActionStatementsaandb,however,requiretheunittoeventuallybeplacedinMode4withtheLimitingConditionsforOperation(LCOs)notmet.TheproposedactionstatementscorrectthisinconsistencybyhavingtheterminalpointoftheshutdownbeMode3withpressurizerpressurebelow1,000psig.Thenewactionstatementsretaintheonehourtimelimitforrestorationofanaccumulatortooperablestatusformostinoperabilityconditions.However,thenewactionstatementsallowslightlymoretimeuntiltheunitmustbeshutdownduetoaninoperableaccumulator.

Attachment1toAEP:NRC:1186Page3Forexample,currently,withanaccumulatorinoperableduetocausesotherthanaclosedisolationvalve,onehourisallowedtorestoreoperabilityortheunitmustbeplacedinMode4within8hours(Unit1).Withthenewactionstatements,12hoursisallowed(beyondtheinitialonehour)toreachtheterminalpoint,whichisMode3withpressurizerpressurebelow1,000psig.TherequirementinthepresentT/SstoimmediatelyopenaclosedisolationvalveorplacetheplantinMode3withinonehourhasbeenremoved.Withtheproposedactionstatements,aclosedisolationvalvewouldbetreatedthesameasotherinoperabilityconditionsfortheaccumulators.Onehourwouldbepermittedtoopenthevalve,ortheunitmustbeplacedinMode3withinthenext6hoursandpressurizerpressurereducedbelow1,000psigwithinthefollowing6hours.Althoughlessconservative,thischangeallowsashutdowntoproceedinamoreorderlyfashionandinthissensemayrepresentanenhancementtosafety.ThenewactionstatementsareconsistentwithNUREG1431,andassuchhavebeenacceptedbytheNRC.AsstatedinNUREG1431,"...theallowedCompletionTimesarereasonable,basedonoperatingexperience,toreachtherequiredplantconditionsfromfullpowerconditionsinanorderlymannerandwithoutchallengingplantsystems."ThecreationofanewactionstatementforaccumulatorboronconcentrationbeingoutsidetheT/Slimitchangestheallowableoutagetimeforthisconditionfromonehourto72hours.AsstatedinNUREG1431,boronintheaccumulatorscontributestotheassumptionthatthecombinedECCSwaterinthepartiallyrecoveredcoreduringtheearlyrefloodingphaseofalargebreakLOCAissufficienttokeepthatportionofthecoresubcritical.Oneaccumulatorbelowtheminimumboronconcentrationlimit,however,willhavenoeffectonavailableECCSwaterandaninsignificanteffectoncoresubcriticalityduringreflood.BoilingofECCSwaterinthecoreduringrefloodconcentratesboroninthesaturatedliquidthatremainsinthecore.Inaddition,currentanalysistechniquesdemonstratethattheaccumulatorsdonotdischargefollowingalargemainsteamlinebreakforthemajorityofplants.Eveniftheydodischarge,.theirimpactisminorandnotadesignlimitingevent.Thus,the72hoursisallowedtoreturntheboronconcentrationtowithinlimits."TheminimumT/SlimitonboronconcentrationisusedinthepostLOCAboronconcentrationcalculation.Thecalculationisperformedtoassurereactorsubcriticalityina-postLOCAenvironment.OfparticularinterestisthelargebreakLOCA,sincenocreditistakenforcontrolrodassemblyinsertion.AreductionintheaccumulatorminimumboronconcentrationwouldproduceasubsequentreductionintheavailablecontainmentsumpconcentrationforpostLOCAshutdownandanincreaseinthemaximumsumppH.Themaximumboronconcentration's

~I~

Attachment1toAEP:NRC:1186Page4usedindeterminingthecoldlegtohotlegrecirculationinjectionswitchovertimeandminimumsumppH.AlthoughtheaffectoftheaboveitemsisnotspecificallyaddressedintheNUREG1431justificationofthe72houractionstatementforboronconcentration,itisnotedthatduetotherelativelysmallsizeofanaccumulatorcomparedtoothersourcesofwaterinthecontainmentsumppost-LOCA(approximately7,000gallonsforanaccumulatorversusapproximately350,000gallonsfortheRWSTandapproximately300,000gallonsofmeltedboratedice),theimpactofboronconcentrationbeingoutsideoftheT/SonsumppHoronlongtermsubcriticalitywouldbeexpectedtobesmall.B.SurveillanceRequirementsT/S4.5.1.dWeareproposingtodeleteT/S4.5.1.d.Thissurveillancerequirementrequiresverificationatleastonceper18monthsthateachaccumulatorisolationvalveopensautomaticallyuponreceiptofasafetyinjectiontestsignal.ThechangeisconsistentwithNUREG1431,and,assuch,hasbeenacceptedbytheNRC.T/S4.5.1.a.2requiresverificationevery12hoursthateachaccumulatorisolationvalveisopen.Additionally,T/S4.5.1.crequiresverificationevery31daysthatpowertotheisolationvalveoperatorisdisconnectedbyremovalofthebreakerfromthecircuit.Thus,theT/Scontainsadequatecontrolstoensurethattheaccumulatorisolationvalvesareopenintherequiredmodes,andverificationofautomaticopeningcapability,althoughconservative,isredundant.ThisredundancywascorrectedinNUREG1431byeliminationoftherequirementtoverifyautomaticopeningoftheaccumulatorisolationvalves.2.T/S4.5.1.bAspresentlywritten,T/S4.5.1.brequiresverificationofaccumulatorboronconcentrationevery31days,andwi.thin6hoursaftereachsolutionvolumeincreaseofgreaterthanorequalto1Xofthetankvolume.Thefirstchangeweareproposingtothissurveillancerequirementistoexplicitlystatethattheboronconcentrationverificationfollowingasolutionadditionisonlyrequiredfortheaffectedaccumulator.AlthoughthisisimplicitinthepresentT/S,the,changeaddsclaritytotheT/SbyremovingvaguenessfromtheT/SandmakesthewordingmoreconsistentwiththeNUREG1431T/Ss.ThesecondchangeistoexcludevolumeadditionsfromtheRWSTfromthosevolumeadditionsrequiringverificationofaccumulatorboronconcentration,providedtheRWSThasnotbeendilutedsinceverifyingthattheRWSTboronconcentrationisequaltoorgreaterthantheaccumulatorboronconcentrationlimit.T/Ss Attachment1toAEP:NRC:1186Page53/4.1.2.8(BoratedWaterSources-Operations)and3/4.5.5(RefuelingWaterStorageTank)requireanidenticalboronconcentrationfortheRWSTasfortheaccumulatorsduringoperation.AsstatedinNUREG1431,"Ztisnotnecessarytoverifyboronconcentrationiftheaddedwaterinventoryisfromtherefuelingwaterstoragetank(RWST),becausethewatercontainedintheRWSTiswithintheaccumulatorboronconcentrationrequirements.ThisisconsistentwiththerecommendationofNUREG-1366."3~T/S4.5.1.aWeareproposinganeditorialchangetoUnit1T/s4.5.1.a.l.Specifically,weareproposingtochangetheterm"waterlevel"to"containedboratedwatervolume"inordertoachieveconsistencywiththeUnit2T/SsandwiththewordinginNUREG1431.TheproposedchangestothissectionareconsistentwithNUREG1431,andassuchhavealreadybeenacceptedbytheNRC.CiBasesChangestotheBaseswererequiredtoreflecttherevisedactionstatements.TheBasesdiscussionontheactionstatementsisconsistentwithNUREG1431.ZIZZ10CFR50.92CRITERIAPer10CFR50.92,aproposedchangedoesnotinvolveasignificanthazardsconsiderationifthechangedoesnots1~involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,2~createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or3~involveasignificantreductioninamarginofsafety.

I Attachment1toAEP:NRC:1186Page6Criterion1Thelimitingconditionsforoperationinvolvingtheaccumulatorarenotalteredbythisproposedchange.Thesurve'illancerequirementsarelessenedsomewhatbytheproposedchanges.Therequirementtotesttheautomaticactuationoftheaccumulatorisolationvalveswasredundanttoexistingsurveillancerequirementsthatrequiredthevalvestobeverifiedopenandwithpowerremoved.Therequirementtotesttheaccumulatorboronconcentrationfollowinga1Xorgreatersolutionvolumeincreas'ewasmodifiedtoexcludevolumeadditionsfromtheRWST,since,perT/Ss,theRWSTboronconcentrationrequirementsduringoperationareidenticaltothosefortheaccumulator.TheproposedchangesareconsistentwithNUREG1431,and,assuch,havealreadybeenfoundacceptablebytheNRC.Therefore,itisconcludedthattheproposedamendmentdoesnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Criterion2Nochangestothelimitingconditionsforoperationoftheaccumulatorsareproposedaspartofthisamendmentrequest.Theproposedchangesdonotinvolveanyphysicalchangestotheplantorchangestoplantoperations.Thus,theproposedchangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Criterion3Thelimitingconditionsforoperationinvolvingtheaccumulatorarenotalteredbythisproposedchange.Thesurveillancerequirementsarelessenedsomewhatbytheproposedchanges.Therequirementtotesttheautomaticactuationoftheaccumulatorisolationvalveswasredundanttoexistingsurveillancerequirementsthatrequiredthevalvestobeverifiedopenandwithpowerremoved.Therequirementtotesttheaccumulatorboronconcentrationfollowinga1XorgreatersolutionvolumeincreasewasmodifiedtoexcludevolumeadditionsfromtheRWST,since,perT/Ss,theRWSTboronconcentrationrequirementsduringoperationareidenticaltothosefortheaccumulator.AlltheproposedchangesareconsistentwithNUREG1431,and,assuch,havealreadybeenfoundacceptablebytheNRC.Therefore,itisconcludedthattheproposedchangesdonotinvolveareductioninamarginofsafety.Lastly,wenotethattheNRChasprovidedguidanceconcerningthedeterminationofsignificanthazardsconsiderationbyprovidingcertainexamples-(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangesthatmayresultinsomeincreasetotheprobabilityorconsequencesofapreviouslyevaluatedaccident,buttheresultsofwhicharewithinacceptablelimits.Asdiscussedabove,theproposedchangesareconsistentwithchangesfoundacceptablebytheNRCinNUREG1431.Therefore,we g~

Attachment1toAEP:NRC:1186Page7concludethattheexamplecitedisapplicableandthatthechangeshouldnotinvolvesignificanthazardsconsideration.