ML17334B574

Application for Amends to Licenses DPR-58 & DPR-74,modifying TS 5.6.2 to Increase Current Limit on Nominal Fuel Assembly Enrichment for New,Westinghouse - Fabricated Fuel Stored in New Fuel Storage Racks

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: ML17333A323 ML17333A325 ML17334B574
References
AEP:NRC:1071U, NUDOCS 9603010071
Download: ML17334B574 (9)

Text

CATEGORY1REGULAT(...

INFORMATION DISTRIBUTION ZSEM(RIDS)ACCESSION NBR:9P03010071 DOC.DATE:

96/02/26NOTARIZED:.

YESDOCKETFAC'L:50-3;5 DonaldC.X:ookNuclearPowerPlant,Unit1,1ndiana,M 050003'550-316DonaldC.CookNuclearPowerPlant,Unit2,Indi.a.a.M05000316ALTH.NAME AUTHORAFFILIATION FITZPATRICK,E.

IndianaMichiganPowerCo.(fa.merly.Indiana&MichiganEleRECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(document ControlDesk)R

SUBJECT:

Application foramendstoLicensesDPR-5S6DPR-74....od;"ifying7c

&~TS5.6.2toincreasecurrentlimit.onnor';na1fuelassemblyenrichment fornew,Westinghouse

-fabricated fuelstoredinAnewfuelstorageracks.TDISTRIBUTION CODE:A001DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:ORSubmittal:

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LTTR17ENCL.L'1 IndianaMichiganPowerCompanyPOBox16631Columbus, OH43216INOMNANlCHIGANPWMFebruary26,1996DocketNos.:50-31550-316AEP:NRC:1071U U.S.NuclearRegulatory Commission ATTN:'ocumentControlDeskWashington, D.C.20555Gentlemen:

DonaldC.CookNuclearPlantUnits1and2TECHNICAL SPECIFICATION 5.6.2INCREASEINMAXIMUMNOMINALFUELASSEMBLYENRICHMENT LIMIT,TAKINGCREDITFORUSEOFINTEGRALFUELBURNABLEABSORBERMATERIALIThisletteranditsattachments constitute anapplication foramendment ofthetechnical specifications (T/Ss)forDonaldC.CookNuclearPlantUnits1and2.Specifically, weproposetomodifyT/S5.6.2toincreasethecurrentlimitonnominalfuelassemblyenrichment fornew,Westinghouse

-fabricated fuelstoredinthenewfuelstorageracks.ThecurrentnominallimitforWestinghouse fuelis4.55weightpercent(w/o)uranium-235 isotope(U-235).Theproposednominallimitis4.95w/oU-235,providedthatthefuelassemblycontainssufficientzirconium diborideintegralfuelburnableabsorber(IFBA)materialtomaintainthemaximumreference fuelassemblyKlessthanorequalto1.4857at68F.Also,T/S5.6.2ismodifiedtopresentitinaformatsimilartothatusedintheStandardT/Ss(NUREG1431,Rev.1).Attachment 1providesadetaileddescription oftheproposedchanges,justification forthechanges,andourdetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92.Attachment 2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment 3containstheproposedrevisedT/Spages.Attachment 4containsareportpreparedbyWestinghouse ElectricCorporation entitled"Criticality AnalysisoftheDonaldC.CookNuclearPlantNewFuelStorageVaultwithCreditforIntegralFuelBurnableAbsorbers,"

datedNovember1995.Thisreportassistsinthejustification forthechangeswhichisprovidedinAttachment 1.Thisreportisnotproprietary toWestinghouse.

Webelievethattheproposedchangeswillnotresultin(1)asignificant changeinthetypesofanyeffluentthatmaybereleasedoffsite,(2)asignificant increaseinindividual orcumulative occupational radiation

exposure, or(3)asignificant reduction inamarginofsafety.96030l007l 960226PORADGCK050003i5jPPDROXOG35 U.S.NuclearRegulatory Commission Page2AEP:NRC:1071UTheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andtheNuclearSafetyandDesignReviewCommittee.

Incompliance withtherequirements of10CFR50.91(b)(1),copiesofthisletteranditsattachments havebeentransmitted totheMichiganPublicServiceCommission andtotheMichiganDepartment ofPublicHealth.Sincerely, E.E.Fitzpatrick VicePresident SP1ORNTOANDSUBSCRIBED BEFOREMETHISDAYOF1996NotaryPublicpitAttachments CC:A.A.BlindG.CharnoffH.Z.MillerNFEMSectionChiefNRCResidentInspector

-BridgmanJ.R.Padgett i~VFJIf~/

ATTACHMENT 1TOAEP:NRC:1071U JUSTIFICATION AND10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICAL SPECIFICATIONS

.g603010071 Attachment 1toAEP:NRC:1071U Page1DESCRIPTION OFCHANGESUnits1and2,Technical Specification (T/S)5.6.2:Administrative changesareproposedtoincorporate.

theinformation presently foundinT/S5.6.2.1and5.6.2.2intoaformatsimilartotheformatusedintheNUREG1431,Rev.1T/Ss.Thisrevisedformatincludesreference toapplicable FSARsections.

AllcurrentT/Srequirements areretained, asfollows:newfuelstoragerackpitch21inchcenter-to-center distance(movedfromT/S5.6.2.1to5.6.2.d);

K,<<willnotexceed0.98whenfuelassemblies areplacedinthenewfuelstoragevaultandaqueousfoammoderation isassumed(movedfromT/S5.6.2.1to5.6.2.c);

themaximumnominalfuelassemblyenrichment limits(movedfromT/S5.6.2.2to5.6.2.aandTable5.6-1).2~Duetotheindividual enrichment limitsforthevariousfueltypes,Table5.6-1isaddedforclarification to5.6.2.a.ProposedT/S5.6.2.brequiresK,<<lessthanorequalto0.95withthenewfuelvaultfloodedwithunborated water.ThisisanewT/Srequirement.

Itisconsistent withtheanalysesprovidedinAttachment 4,andwithNUREG1431,Rev.1format.The.FSARanalysisreferenced byproposedT/S5.6.2.cisnotpresently inFSARSection9.7,butwillbeaddedduringthenextannualFSARupdate.Thiscondition isnotlimitingwithregardtoK,<<,.thecondition inproposedT/S5.6.2.bislimiting.

Anasterisked footnoteisaddedtotheenrichment limitsfortheWestinghouse fueltypesdescribed inItems1and3inTable5.6-1.Thefootnotecontainsthefollowing text:Amaximumnominalenrichment of4.95weightpercentU-235forWestinghouse fueltypesisacceptable providedthatsufficient integralfuelburnableabsorberispresentineachfuelassemblystoredinthenewfuelstoragerackssuchthatthemaximumreference fuelassemblyKislessthanorequalto1.4857at684F.3.AnumberofadministrativechangesaremadeforT/Sclarity,usability, andconsistency betweenunits,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 Attachment 1toAEP:NRC:1071U Page2REASONANDJUSTIFICATION FORCHANGESIngeneral,nuclearpowerplanteconomics dictatelongeroperating cycles.Withregardtonuclearfuel,thismeanseitherhigherfuelenrichments oralargernumberofnewfuelassemblies eachreload.Intoday'smarket,higherenrichment islessexpensive thanthepurchaseofadditional fuelassemblies, fromthevariousstandpoints ofcostperfuelassembly, efficient useofuranium,andlong-term spentfuelstoragecosts.Specifically withregardtoCookNuclearPlant,althoughthefacilityislicensedforfuelenrichments upto5.0weightpercent(w/o)uranium-235 isotope(U-235),theenrichment limitforthenewfuelstorageracksperT/S5.6.2.2is4.55w/oU-235forWestinghouse fueltypes.Thislimitisestablished duetothefactthat,fortheunborated waterdensityfloodingcondition, K,<<is0.9495at4.55w/oU-235,justbelowthe0.95limit.Fortheoptimummoderation (aqueousfoam)floodingcondition, K,<<is0.8974at4.55w/oU-235,wellbelowthe0.98limit.Usingamethodcalled"reactivity equivalencing,"

theincreaseinthemaximumnominalfuelassemblyenrichment limitto4.95w/oU-235isjustified, providedthatenoughintegralfuelburnableabsorber(IFBA)materialispresentineachfuelassemblytobestoredinthenewfuelstorageracks.Attachment 4containsareportbyWestinghouse ElectricCorporation entitled"Criticality AnalysisoftheDonaldC.CookNuclearPlantNewFuelStorageVaultwithCreditforIntegralFuelBurnableAbsorbers."

Inthisreport,Westinghouse analyzedthevariousWestinghouse fueltypesusedatCookNuclearPlanttodetermine whichtypewasbounding.

Then,theyanalyzedtheboundingfueltypeforvariousIFBAloadings, inmilligrams ofboron-10isotopeperinchoffuelrodlength.Westinghouse determined (seeTable4ofAttachment 4)thatforasmallnumberofIFBAcoatedrods,upto32,(thenumberisavariablecontrolled bythecoredesignerandcandifferforeachfuelassembly) fuelenrichedto5.0w/oU-235canbesafelystoredinthenewfuelstorageracksandcontinuetomeettheK,<<limits.Therefore, usingreactivity equivalencing, anyfuelassemblyplacedinthenewfuelstoragerackswillnothavegreaterreactivity thanafuelassemblyatthecurrentT/Slimit.Table4ofAttachment 4providesanadministrative guidetoensurethateachfuelassemblyintendedforstorageinthenewfuelstoragerackswillmeettheproposedT/Slimitpriortoplacement ofthefuelassemblyintheracks.Thewordingforthefootnotewaschosenbecauseitissimilartothewordinginpreviously approvedTechnical Specifications changesfortheFarley,V.C.Summer,andBraidwood nuclearpowerstations.

(Forthereviewer's reference:

FarleyUnit2T/SAmendment No.101,V.C.SummerUnit1T/SAmendment No.116,andBraidwood Units1&2Amendment No.58.)Thevalueforthemaximumreference fuelassemblyK(lessthanorequalto1.4857at684F)wascalculated inAttachment 4.AlthoughtheWestinghouse reportprovidesforanincreaseinthenewfuelstorageracklimitforWestinghouse fuelupto5.0w/oU-235,duetothenormalmanufacturing enrichment variability of+0.05w/oU-235,alimitofonly4.95w/oU-235isrequested.

AlsosincetheWestinghouse reportonlyanalyzedforWestinghouse fueltypes,nochangeisrequested forthenon-Westinghouse fueltypeslistedintheproposedTable5.6-1.

Attachment 1toAEP:NRC:1071U Page3NUREG1431,Rev.1formatisusedfortheseproposedchangestofacilitate useandapproval.

10CFR50.92EVALUATION Per10CFR50.92,aproposedamendment willnotinvolve.asignificant hazardsconsideration iftheproposedamendment doesnot:(1)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated, (2)createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated, or(3)involveasignificant reduction inamarginofsafety.Criterion 1Theproposedchangeswillnotinvolveasignificant increaseintheprobability ofanaccidentpreviously evaluated becausesimilaradministrative controlstothosepresently usedtoidentifynewfuelstoragerackinventory andcompliance withT/Slimitswillbeused.Therearenophysicalchangestotheplantassociated withthisT/Schange.Theconsequences ofanaccidentpreviously evaluated willnotbeincreased becausethereactivity ofthefuelstoredinthenewfuelstorageracksundertheproposedT/Slimitswillbenogreaterthanthereactivity offuelstoredinthenewfuelstoragerackspresently allowable underthecurrentT/Slimits.CRITERION 2Theproposedchangeswillnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated becausethechangeswillinvolvenophysicalchangestotheplantnoranychangesinplantoperations.

Furthermore, thereactivity ofthefuelstoredinthenewfuelstorageracksundertheproposedT/Slimitswillbenogreaterthanthereactivity offuelstoredinthenewfuelstoragerackspresently allowable underthecurrentT/Slimits.CRITERION 3Theproposedamendment willnotinvolveasignificant reduction inamarginofsafetybecausethereactivity ofthefuelstoredinthenewfuelstorageracksundertheproposedT/Slimitswillbenogreaterthanthereactivity offuelstoredinthenewfuelstoragerackspresently allowable underthecurrentT/Slimits.

ATTACHMENT 2TOAEP:NRC:1071U EXISTINGTECHNICAL SPECIFICATION PAGESMARKEDTOREFLECTPROPOSEDCHANGES