ML17334B574
| ML17334B574 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/26/1996 |
| From: | FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17333A324 | List: |
| References | |
| AEP:NRC:1071U, NUDOCS 9603010071 | |
| Download: ML17334B574 (9) | |
Text
CATEGORY1REGULAT(...INFORMATIONDISTRIBUTIONZSEM(RIDS)ACCESSIONNBR:9P03010071DOC.DATE:96/02/26NOTARIZED:.YESDOCKETFAC'L:50-3;5DonaldC.X:ookNuclearPowerPlant,Unit1,1ndiana,M050003'550-316DonaldC.CookNuclearPowerPlant,Unit2,Indi.a.a.M05000316ALTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(fa.merly.Indiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(documentControlDesk)R
SUBJECT:
ApplicationforamendstoLicensesDPR-5S6DPR-74....od;"ifying7c&~TS5.6.2toincreasecurrentlimit.onnor';na1fuelassemblyenrichmentfornew,Westinghouse-fabricatedfuelstoredinAnewfuelstorageracks.TDISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionENOTES:REC.RIENTIDCVf>EyNAMEPD3-'ICKMAN,;JINTERN.FILER~DRCHiHICBNRR/DSSA/SRXBOGC/HDS2""EXTERNAL:NOACCOPIESLTTRENCL11111111111011RECIPIENTIDCODE/NAMEPD3-1PDNRR/DE/Fi41CBNRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCL1111111111DNNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE(CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.415"2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDtTOTALNUMBEROFCOPIESREQUIRED:LTTR17ENCL.L'1 IndianaMichiganPowerCompanyPOBox16631Columbus,OH43216INOMNANlCHIGANPWMFebruary26,1996DocketNos.:50-31550-316AEP:NRC:1071UU.S.NuclearRegulatoryCommissionATTN:'ocumentControlDeskWashington,D.C.20555Gentlemen:DonaldC.CookNuclearPlantUnits1and2TECHNICALSPECIFICATION5.6.2INCREASEINMAXIMUMNOMINALFUELASSEMBLYENRICHMENTLIMIT,TAKINGCREDITFORUSEOFINTEGRALFUELBURNABLEABSORBERMATERIALIThisletteranditsattachmentsconstituteanapplicationforamendmentofthetechnicalspecifications(T/Ss)forDonaldC.CookNuclearPlantUnits1and2.Specifically,weproposetomodifyT/S5.6.2toincreasethecurrentlimitonnominalfuelassemblyenrichmentfornew,Westinghouse-fabricatedfuelstoredinthenewfuelstorageracks.ThecurrentnominallimitforWestinghousefuelis4.55weightpercent(w/o)uranium-235isotope(U-235).Theproposednominallimitis4.95w/oU-235,providedthatthefuelassemblycontainssufficientzirconiumdiborideintegralfuelburnableabsorber(IFBA)materialtomaintainthemaximumreferencefuelassemblyKlessthanorequalto1.4857at68F.Also,T/S5.6.2ismodifiedtopresentitinaformatsimilartothatusedintheStandardT/Ss(NUREG1431,Rev.1).Attachment1providesadetaileddescriptionoftheproposedchanges,justificationforthechanges,andourdeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92.Attachment2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment3containstheproposedrevisedT/Spages.Attachment4containsareportpreparedbyWestinghouseElectricCorporationentitled"CriticalityAnalysisoftheDonaldC.CookNuclearPlantNewFuelStorageVaultwithCreditforIntegralFuelBurnableAbsorbers,"datedNovember1995.ThisreportassistsinthejustificationforthechangeswhichisprovidedinAttachment1.ThisreportisnotproprietarytoWestinghouse.Webelievethattheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofanyeffluentthatmaybereleasedoffsite,(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure,or(3)asignificantreductioninamarginofsafety.96030l007l960226PORADGCK050003i5jPPDROXOG35 U.S.NuclearRegulatoryCommissionPage2AEP:NRC:1071UTheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommittee.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.Sincerely,E.E.FitzpatrickVicePresidentSP1ORNTOANDSUBSCRIBEDBEFOREMETHISDAYOF1996NotaryPublicpitAttachmentsCC:A.A.BlindG.CharnoffH.Z.MillerNFEMSectionChiefNRCResidentInspector-BridgmanJ.R.Padgett i~VFJIf~/
ATTACHMENT1TOAEP:NRC:1071UJUSTIFICATIONAND10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONS:.g603010071 Attachment1toAEP:NRC:1071UPage1DESCRIPTIONOFCHANGESUnits1and2,TechnicalSpecification(T/S)5.6.2:Administrativechangesareproposedtoincorporate.theinformationpresentlyfoundinT/S5.6.2.1and5.6.2.2intoaformatsimilartotheformatusedintheNUREG1431,Rev.1T/Ss.ThisrevisedformatincludesreferencetoapplicableFSARsections.AllcurrentT/Srequirementsareretained,asfollows:newfuelstoragerackpitch21inchcenter-to-centerdistance(movedfromT/S5.6.2.1to5.6.2.d);K,<<willnotexceed0.98whenfuelassembliesareplacedinthenewfuelstoragevaultandaqueousfoammoderationisassumed(movedfromT/S5.6.2.1to5.6.2.c);themaximumnominalfuelassemblyenrichmentlimits(movedfromT/S5.6.2.2to5.6.2.aandTable5.6-1).2~Duetotheindividualenrichmentlimitsforthevariousfueltypes,Table5.6-1isaddedforclarificationto5.6.2.a.ProposedT/S5.6.2.brequiresK,<<lessthanorequalto0.95withthenewfuelvaultfloodedwithunboratedwater.ThisisanewT/Srequirement.ItisconsistentwiththeanalysesprovidedinAttachment4,andwithNUREG1431,Rev.1format.The.FSARanalysisreferencedbyproposedT/S5.6.2.cisnotpresentlyinFSARSection9.7,butwillbeaddedduringthenextannualFSARupdate.ThisconditionisnotlimitingwithregardtoK,<<,.theconditioninproposedT/S5.6.2.bislimiting.AnasteriskedfootnoteisaddedtotheenrichmentlimitsfortheWestinghousefueltypesdescribedinItems1and3inTable5.6-1.Thefootnotecontainsthefollowingtext:Amaximumnominalenrichmentof4.95weightpercentU-235forWestinghousefueltypesisacceptableprovidedthatsufficientintegralfuelburnableabsorberispresentineachfuelassemblystoredinthenewfuelstoragerackssuchthatthemaximumreferencefuelassemblyKislessthanorequalto1.4857at684F.3.AnumberofadministrativechangesaremadeforT/Sclarity,usability,andconsistencybetweenunits,asfollows:a~b.cd.Unit1pages5-4and5-5:moveportionsofsection5.4onpage5-4topage5-5;Unit1pages5-5,5-6,5-8andUnit2page5-6:fontchange;Unit1page5-5:remove"1."from5.6.1.1.c,whichisnotrequired;Unit1pages5-6and5-8:movesection5.6.1.2frompage5-8topage5-6;e.ForbothunitsT/Ss,sections5.6.1.2and5.6.2:heading,change"Wt.0"'U"to<<Wt.0U-235<<.inthetable Attachment1toAEP:NRC:1071UPage2REASONANDJUSTIFICATIONFORCHANGESIngeneral,nuclearpowerplanteconomicsdictatelongeroperatingcycles.Withregardtonuclearfuel,thismeanseitherhigherfuelenrichmentsoralargernumberofnewfuelassemblieseachreload.Intoday'smarket,higherenrichmentislessexpensivethanthepurchaseofadditionalfuelassemblies,fromthevariousstandpointsofcostperfuelassembly,efficientuseofuranium,andlong-termspentfuelstoragecosts.SpecificallywithregardtoCookNuclearPlant,althoughthefacilityislicensedforfuelenrichmentsupto5.0weightpercent(w/o)uranium-235isotope(U-235),theenrichmentlimitforthenewfuelstorageracksperT/S5.6.2.2is4.55w/oU-235forWestinghousefueltypes.Thislimitisestablishedduetothefactthat,fortheunboratedwaterdensityfloodingcondition,K,<<is0.9495at4.55w/oU-235,justbelowthe0.95limit.Fortheoptimummoderation(aqueousfoam)floodingcondition,K,<<is0.8974at4.55w/oU-235,wellbelowthe0.98limit.Usingamethodcalled"reactivityequivalencing,"theincreaseinthemaximumnominalfuelassemblyenrichmentlimitto4.95w/oU-235isjustified,providedthatenoughintegralfuelburnableabsorber(IFBA)materialispresentineachfuelassemblytobestoredinthenewfuelstorageracks.Attachment4containsareportbyWestinghouseElectricCorporationentitled"CriticalityAnalysisoftheDonaldC.CookNuclearPlantNewFuelStorageVaultwithCreditforIntegralFuelBurnableAbsorbers."Inthisreport,WestinghouseanalyzedthevariousWestinghousefueltypesusedatCookNuclearPlanttodeterminewhichtypewasbounding.Then,theyanalyzedtheboundingfueltypeforvariousIFBAloadings,inmilligramsofboron-10isotopeperinchoffuelrodlength.Westinghousedetermined(seeTable4ofAttachment4)thatforasmallnumberofIFBAcoatedrods,upto32,(thenumberisavariablecontrolledbythecoredesignerandcandifferforeachfuelassembly)fuelenrichedto5.0w/oU-235canbesafelystoredinthenewfuelstorageracksandcontinuetomeettheK,<<limits.Therefore,usingreactivityequivalencing,anyfuelassemblyplacedinthenewfuelstoragerackswillnothavegreaterreactivitythanafuelassemblyatthecurrentT/Slimit.Table4ofAttachment4providesanadministrativeguidetoensurethateachfuelassemblyintendedforstorageinthenewfuelstoragerackswillmeettheproposedT/Slimitpriortoplacementofthefuelassemblyintheracks.ThewordingforthefootnotewaschosenbecauseitissimilartothewordinginpreviouslyapprovedTechnicalSpecificationschangesfortheFarley,V.C.Summer,andBraidwoodnuclearpowerstations.(Forthereviewer'sreference:FarleyUnit2T/SAmendmentNo.101,V.C.SummerUnit1T/SAmendmentNo.116,andBraidwoodUnits1&2AmendmentNo.58.)ThevalueforthemaximumreferencefuelassemblyK(lessthanorequalto1.4857at684F)wascalculatedinAttachment4.AlthoughtheWestinghousereportprovidesforanincreaseinthenewfuelstorageracklimitforWestinghousefuelupto5.0w/oU-235,duetothenormalmanufacturingenrichmentvariabilityof+0.05w/oU-235,alimitofonly4.95w/oU-235isrequested.AlsosincetheWestinghousereportonlyanalyzedforWestinghousefueltypes,nochangeisrequestedforthenon-WestinghousefueltypeslistedintheproposedTable5.6-1.
Attachment1toAEP:NRC:1071UPage3NUREG1431,Rev.1formatisusedfortheseproposedchangestofacilitateuseandapproval.10CFR50.92EVALUATIONPer10CFR50.92,aproposedamendmentwillnotinvolve.asignificanthazardsconsiderationiftheproposedamendmentdoesnot:(1)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or(3)involveasignificantreductioninamarginofsafety.Criterion1TheproposedchangeswillnotinvolveasignificantincreaseintheprobabilityofanaccidentpreviouslyevaluatedbecausesimilaradministrativecontrolstothosepresentlyusedtoidentifynewfuelstoragerackinventoryandcompliancewithT/Slimitswillbeused.TherearenophysicalchangestotheplantassociatedwiththisT/Schange.TheconsequencesofanaccidentpreviouslyevaluatedwillnotbeincreasedbecausethereactivityofthefuelstoredinthenewfuelstorageracksundertheproposedT/SlimitswillbenogreaterthanthereactivityoffuelstoredinthenewfuelstoragerackspresentlyallowableunderthecurrentT/Slimits.CRITERION2Theproposedchangeswillnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluatedbecausethechangeswillinvolvenophysicalchangestotheplantnoranychangesinplantoperations.Furthermore,thereactivityofthefuelstoredinthenewfuelstorageracksundertheproposedT/SlimitswillbenogreaterthanthereactivityoffuelstoredinthenewfuelstoragerackspresentlyallowableunderthecurrentT/Slimits.CRITERION3TheproposedamendmentwillnotinvolveasignificantreductioninamarginofsafetybecausethereactivityofthefuelstoredinthenewfuelstorageracksundertheproposedT/SlimitswillbenogreaterthanthereactivityoffuelstoredinthenewfuelstoragerackspresentlyallowableunderthecurrentT/Slimits.
ATTACHMENT2TOAEP:NRC:1071UEXISTINGTECHNICALSPECIFICATIONPAGESMARKEDTOREFLECTPROPOSEDCHANGES