ML17334B053

Proposed Tech Spec Changes Increasing Allowed Peak Pellet Exposure for Advanced Nuclear Fuel Corp Fuel

ML17334B053
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Site:	Cook
Issue date:	02/20/1987
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
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t'@*44~~'"+S~)~~W,<<,t.k~'-J}~,...~aI,q~,'I~!~~w+i'=<il'J'Ii}"~)aw<v'~'L4s:~~VAttachment 2toAEP:NRC:1018 ProposedRevisedTechnical Specification Pages8703030051 870220PDRADOCK050003i5PPDR 0POWERDISRIBUTIONLIMITSSURVEILLANCE REQUIREMENTS (Continued) whereF(Z)-F(Z,g,)atg,forwhichF(Z,t)T(E,)F(Z)F(E)isamaximumatRforwhichF(Z,t.)isamaximumT(EE)F(Z)andF(Z)arefunctions ofcoreheight,Z,andcorrespond ateachLF(Z,i)ZtotherodiforwhichT(E)isamaximumatthatZV(Z)isacycledependent functionandisprovidedinthePeakingFactorLimitReport.K(Z)isdefinedinFigure3,2-2forExxonNuclearCompanyfuelandinFigure3.2-3forWestinghouse fuel.T(E)isdefinedinFigures3.2-4and3.2-f.Ep(Z)isanuncertainty factortoaccountforthereduction intheF(E<)curveduetoaccumulation ofexposurepriortothenextfluxmap.WestinhouseFueE(Z)1.0PEp(Z)1.0ExxonNuceaCoueEP(Z)1.0EP(Z)1'0+[.0040xF(Z)]0.0<EE<17.6217.62<ER<34.5E(Z)1.0PEp(Z)10+f0093xP(Z)jEp(Z)-1.0+[.0060xF(Z)jE(Z)1.0P34.5<E<42.242.2<E<48.048.0<E<51.0lD.C.COOK-UNIT13/42-7AMENDMENT NO.s~e~P POWERTIBUIONLIIeLIMITINGCONDITION FOROPERATION (Continued)

'SesttuhouseFuel~NCFuaF-1.0F1.0PF-1.0PF-1.0PFP1.0+[.0015xW]F1~0+[.0033xW]Fp1.0+[.0020 xW]F1.0P0.0gE~<17.6217.62<ER<34.534.5<E<42.242.2<E<48.048.0<E<51.0whereWisthenumberofeffective fullpowerweeks(roundeduptothenexthighestinteger)sincethelastfullcorefluxmap.indicated bytherelationships.*

• "-F(Z,g,)xV(Z)x100%Westinghouse FuelAPLminoverZofF(E)xK(Z)x100$ExxonNuclearCo.FuelLF(Zg)xV(Z)xEp(Z)whereF(Z,g)isthemeasuredF(Z,g,),including a3%manufacturing tolerance uncertainty anda5%m9asurement uncertainty, atthetimeoftargetfluxdetermination fromapowerdistribution mapusingthemovableincoredetectors.

V(Z)isthefunctiongiveninthePeakingFactorLimitReport.Theabovelimitisnotapplicable inthefollowing coreplaneregions.1.Lowercoreregion0%to10%inclusive.

2.Uppercoreregion90%to100%inclusive.

• TheAPDMSmaybeoutofservicewhensurveillance fordetermining powerdistribution mapsisbeingperformed.

D.C.COOK-UNIT13/42-20AMENDMENT NO.

2.22.1(0,2.04)(17.62,2;04) 2.0~-'===-:(34.5,1.95)

-(42.2,1.86)

~1.94CV1.81.7LFQ(ER)LFQ(Ea)LFQ(Ea)0.0<ER<17.62==2.134-.005333 Ep,17.62<Eg,<34.5=2.353-.01169 Ea34.5<Eg,<42.2(48.0,1.82)

(51.0,1.82)1.61.5LF(ER)=2.151-.006897KQF(EI)~182Q42.2<EK<48.048.0<EK<51.01.0~9(0,1.0)(17.62,1.0)~~'~~(34.5,0.956)

.0,0.:(42.2,0.912)

~=(48892).8.7T(Eg,)~1.0T(ER)~1.046-.002614 ERT(Eg,)~1.154-.00573 Eg,T(Eg,)=1.054-003381 Eg,T(Eg,)~0.8920.0(ER17.62<E(34.5<Eg,42.2<EE48.0<Ea<17.62:--=~<34.5'42.2<48.0<51.0.rI'(51.0,0.892',.6II~~tl~~=~~~0102030PeakPelletExposureini&Q/KG4050FIGURE3.2-4ExposureDependent FQLimit,FL(Eg),andNormalized LimitT(ER)asafunctionofPeakPPlletBurnupforExxonNuclearCompanyFue)D.C.COOK-UNIT13/42>>23A,KNDHENT NO.

Attachment 3toAEP:NRC:1018 ANFEvaluation ofLOCAConsiderations

~~<<,'

NQV.f].'Stg1S:4sE78+ONNUCLEARCOMPANY,INC.600100THAVEffVK>C.POSOXS0777.SSU.EVIlK.WA SS009(2N>GO~00November11,1986ENC/AEP-0535 Hr.RickBennett,EngineerNuclearHater1als 5FuelHanagement Ind1ana5HichiganElectricCompanyc/oAmericanElectricPowerServiceCorp.OneRiverside Plaza,20thFloorColumbus, OH43216-6631

DearHr.8ennett:

Attachedisarecommended changetotheD.C.CookUnitlTechnical Specification onFtoallowoperation ofENCfueltopeakpelletexposures ofglGGD)NT.Adustification ofthischangeisalsoattachedforyouruse1nobtaining NRCapprovalforth1schange.Ifyouhaveanyquestions regarding theattachment, pleasecontactourHr.J.S,Holm(telephone 509375-8142).

~Sincerely A'.~H.G.ShawContractAdministrator Attachment cc:H.P.AlexfchJ.H.Cleveland D.H.MalinY.YanderBurg J.S.Holm(ENC)RARlPAPtPAGB/'Pa.,ass,,srgCfgsa0~00sse0stafs0ss

/f40Vli'.8615'47E7P.3.C.CKRef:(1)XN-NF-85-115, Rev.),"D.C.CookUnit1LimitingBreakK(Z)LOCA/ECCS Analysis,"

November1986.(2)XN-NF-85-68(P),

Rev.1,"DonaldC.CookUnit2LimitingBreakLOCA/ECCS

Analysis, lOXSteamGenerator TubePlugging, andK(Z)Curve,"April1986.(3)XN-NF-85-117, Supp.1)"St.LucieUnit1RevisedLOCA/ECCS Analysiswith15%SteamGenerator TubePlugging8reakSpectrumandExposureResults,"

December1985,ALOCA/ECCS analysisJustifying theoperation ofENCfuelcurrently intheD.C.CookUnit1reactorispresented inReference 1.TheanalysisinthatreportsupportsapeakF~of2.04withanaxialdependence asshowninFigure1.Thisanalysisisapplicable totheENCfuelcurrently intheD.C.CookUnit1reactor,withaminimumpeakrodaverageexposuregreaterthan20GWd/HTandanticipated tobelessthan47GWd/HT.Justification foranexposuredependent F~forD.C.CookUnit1isbasedonanexposureanalysisforD.C.CookUnit2(Reference 2).Peakcladdingtemperatures aredependent uponfuelrodinitialstoredenergy,whichfortheEXEH/PMRmodelsincreases from0toabout2GWd/HTHandthendecreases withexposure.

TheanalysisforD.C,CookUnit2with17x17fuelgeometrydemonstrated thatovertheexposurerangeof0to41GMd/HTH,thepeakcladdingtemperature decreased withexposureforexposures beyondthepeakstoredenergyexposure.

AsimilartrendwasobservedforSt,LucieUnit1with15x15fuelgeometry(Reference 3).SimilarresultswouldbeexpectedforD.C.CookUnit1with15x15fuelgeometryusingEXEH/PWRmodelsBasedonthetrendofdecreasing peakcladdingtemperature withincreasing

exposure, theanalysisinReference 1isconservative andsupportsanFofatleast1.95forENCfuelatpeakrodaverageexposures between20anII47GMd/HTH,Apeakrodaverageexposureof47GMd/HTHisequivalent toapeakpelletexposureof51GWd/HTH.Therecommended D.C.CookUnit1exposuredependent FTechnical Specification Figure3.2-4isattached.

ThisfigureisthetameasthefigureinthecurrentD.C.CookUnit1Technical Specification bu'iththeadditionofaconstantFlimitof1.82from48.0GWd/HTto51GWd/HTpeakpelletexposure, Forc3)nsistency withthecurrentD.C.CookUnit1Technical Specification, thecurvehasbeenmaintained intermsofpeakpelletburnvp,HAPlFAXNO'PAGEAT'TN.

I.21.D(6.0,1.0)DO0f2345I780,18ki12COREHEIGHTCFT>P~OFigure1IhtChannelFactorNormalized Operating

Envelope, Fq=2.04,K{Z)Function 2.2Z.l2.0(0,2.04)(,17.62,2.04)

(34.5,1.95) 1,9(42.2,1.86) 1.71.61.5Ft(EE)"2.04Fq(Ea)=2,134-.005333 Eg,F)(ER)~2.353-.01159 55Fq(Ek)=2.151-.006897 EaLFq(ER)=1.82L0.0<E9.<17.617.62<EK<34.534.5<ER<42,242.2<,Eg,<48.048,0<Ea<51.0(48.0,1.82)

(51.0,1,82 1,0(17.62,1.0)(34,5,.956)(42.2,.912)(48.0,.892)(51.0,.89.8.7T{Ea)-1.00.0<Eg<17.62T{Eg,)=1.046-.002614 Eg,17.62<ER<34.5T(EI()1,154-,00573 ER34.5<EIl,<<42,2T(Eg)~1,054-.003381 Q,42.2<Eg.<48.0TEg,)0.89248.0<EE<51.01020PeakPelletExposurein%ID/KG405060Figure3.2-4ExposureOependent FqLimit,Fq(Ea),andNormalized Limit~LT(ER)asafunctionofPeakPellet8urnupforExxonNuclearCo..panyF.e1O.C.Cook-Unit13/42-23Amendment No.RAPIFAXATTIL4 AFFIDAVIT*STATEOFWASHINGTON

)ss.COUNTYOFBENTON)I,H.E.Williamson beingdulysworn,herebysayanddepose:l.IamManager,Licensing andSafetyEngineering, forAdvancedNuclearFuelsCorporation

("ANF"),andassuchIamauthorized toexecutethisAffidavit.

2.IamfamiliarwithANF'sdetaileddocumentcontrolsystemandpolicieswhichgoverntheprotection andcontrolofinformation.

3.IamfamiliarwiththeLetterHGS-87-55(P) entitled"DCCookUnitIPeakPelletBurnupExtension" referredtoas"Document."

Information contained inthisDocumenthasbeenclassified byANFasproprietary inaccordance withthecontrolsystemandpoliciesestablished CbyANFforthecontrolandprotection ofinformation.

4.Thedocumentcontainsinformation ofaproprietary andconfidential naturean'disofthetypecustomarily heldinconfidence byANFandnotmadeavailable tothepublic.Basedonmyexperience, Iamawarethatothercompanies regardinformation ofthekindcontained intheDocumentasproprietary andconfidential, 5.*TheDocumenthasbeenmadeavailable totheU.S.NuclearRegulatory Commission inconfidence, withtherequestthattheinformation contained intheDocumentwillnotbedisclosed ordivulged.

6.TheDocumentcontainsinformation whichisvitaltoacompetitive advantage ofANFandwouldbehelpfultocompetitors ofANFwhencompeting withANF.7.Theinformation contained intheDocumentisconsidered tobeproprietary byANFbecauseitrevealscertaindistinguishing aspectsofPWRFuelDesignmethodology whichsecurecompetitive advantage toANFforfueldesignoptimization andmarketability, andincludesinformation utilizedbyANFinitsbusinesswhichaffordsANFanopportunity toobtainacompetitive advantage overitscompetitors whodonotormaynotknoworusetheinformation contained intheDocument.

8.Thedisclosure oftheproprietary information contained intheDocumenttoacompetitor wouldpermitthecompetitor toreduceitsexpenditure ofmoneyandmanpowerandtoimproveitscompetitive positionbygivingitextremely valuableinsightsintoPWRFuelDesignmethodology andwouldresultinsubstantial harmtothecompetitive positionofANF.9.TheDocumentcontainsproprietary information whichisheldinconfidence byANFandisnotavailable inpublicsources.10.Inaccordance withANF'spoliciesgoverning theprotection andcontrolofinformation, proprietary information contained intheDocumenthasbeenmadeavailable, onalimitedbasis,toothersoutsideANFonlyasrequiredandundersuitableagreement providing fornon-disclosure andlimiteduseoftheinformation.

11.ANFpolicyrequiresthatproprietary information bekeptinasecuredfileorareaanddistributed onaneed-to-know basis.

12.ThisDocumentprovidesinformation whichrevealsPWRFuelDesignmethodology developed byANFoverthepastseveralyears.ANFhasinvestedthousands ofdollarsandseveralman-months ofeffortindeveloping thePWRFuelDesignmethodology revealedintheDocument.

Assumingacompetitor hadavailable thesamebackground dataandincentives asANF,thecompetitor might,ataminimum,developtheIinformation forthesameexpenditure ofmanpowerandmoneyasANF.THATthestatements madehereinabove are,tothebestofmyknowledge, information, andbelief,truthfulandcomplete.

FURTHERAFFIANTSAYETHNOT.SWORNTOANDSUBSCRIBED beforemethis~d~dayof198.NOfARYPUBLIC y~

Attachment 5toAEP:NRC:1018 ANFEvaluation (Non-Proprietary) ofMechanical DesignConsiderations forPeakPelletExposures upto48.7Mwd/kg x*NON-PROPRIETARY x*HGS-87-055 (P),Attachment 2Page1of2DCCookUnit1-PeakPelletBurnuExtension BBackBround:ThelastreloadofANF(formerly ENC)fuelsuppliedfortheDCCookUnit1reactoriscurrently initslastcycleofoperation.

Aburnupextension analysishadbeenperformed forthisfuelin1984inordertosupportburnuplevelsof41.0,43.7,and48.0GWD/MtUrespectively forpeakassembly, peakrod,andpeakpellet.Reactoroperating conditions sincethattimehaveresultedinhigheraxialpeakingthanoriginally projected.

Consequently, thepeakpelletburnupisnowexpectedtoapproachalevelof48.5GWD/MtU.Thepeakrodandpeakassemblyburnuplevelsarenotaffected.

Areviewoftheoriginalanalysessupporting theburnupextension hasbeenconducted inordertodetermine theconsequences ofanincreaseinpeakpelletexposure.

Thereviewconsidered anadditional increaseinpeakpelletexposureto48.7GWD/MtUtoprovidemarginfor.apotential endofcyclecoastdown.

Summar.ofBurnuExtension AnalysisReview:Theoriginalburnupextension analysi,s, reportedinXN-NF-84-25, Rev.0(Reference 1),addressed thefollowing aspectsofdesign:(1)SteadyStateStress,(2)SteadyStateStrain,(3)CladdingCorrosion andHydrogenAbsorption, (4)Transient StressandStrainandCladdingFatigue,(5)CladdingCreepCollapse, (6)FuelRodInternalGasPressure, (7)FuelRodGrowth.(8)SpacerSpringForce,and(9)FuelAssemblyGrowth.Ofthese,onlySteadyStateStrain,Corrosion andHydrogenAbsorption, andFuelRodInternalPressurearesignificantly affectedbytheaxialprofileofthefuelrod.Theremainder oftheitemsareessentially independent ofthepeakpelletexposure.

TheresultsreportedinXN-NF-84-25, Rev.0remainvalidfortheseitems.Thepowerhistoryusedfor.theoriginalburnupextension analysiswasbasedonaconservative best-estimate ofthemaximumdischarge exposurerod,assumingfullpoweroperation.

Inrealitytheoperation ofthereactorhasbeenlimitedto90percentoffullpower.Therefore, theoriginalpower.historyprojection represents aboundingcasefor.thisfuel.Therevisedanalysisshowsthatcladstrain,corrosion andhydrogenabsorption remainwithinthedesignlimits,andthefuelrodpressureremainsbelowsystempressure.

'krNON-PROPRIETARY x+HGS-87-055 (P),Attachment 2Page2of2SteadStateStrain,CladdinCorrosion andHdroenAbsortion:Themaximumcladdingstrain,corrosion andhydrogenabsorption weredetermined tooccuratthepeakaxialregionintheoriginalburnupextension analysis.

Reviewofthisanalysisshowedtheresultsfromthepreviousanalysistohavebeentakenfor.apeakpelletexposureof48.3GWD/MtU.Becauseofthesubstantial marginforthesedesigncriteriaasimpleextrapolation wasusedtoprojecttheconditions forapeakpelletexposureof48.7GWD/MtU.Extrapolating theresultsoftheoriginalanalysisandincluding anuncertainty offivepercentyieldsthefollowing results:~Pr'o'ctedCriteriaTotalPositiveStrain,(0)MaximumPositiveStrainIncrease, (8)CladdingCorrosion, (inch)HydrogenAbsorption, (ppm)Therefore.

thefuelwillremainwellwithinthecriteriafortheseitems.FuelRodInternalPressure:

AnewRODEX2.(Reference 2)analysiswasperformed

.usingtheapprovedmethodology for'nternal gaspressuredetermination andtheboundingpower,history.Theaxialpeakingfactorfromtheoriginalextension analysiswasincreased by2'8atthemaximumaxialregioninordertoboundthe1.5%increaseinhurnupfrom48.0to48.7GWD/MtU.Theresultsofthisanalysisshowedapealeinternalpressureof(]psiaoverthedesignlifeofthefuel.Thisvalueiswellwithinthecriterialimitofthe2250psiareactoroperating pressureasgiveninXN-NF-84-25, Rev.0.Conclusion:

ReviewoftheanalysisfortheANFfuelsuppliedtotheDCCookUnit1reactorhasshownthefuelcapableofmeetinga11designcriteriaatapeakpelletexposureof48.7GWD/MtU.Theresultspresented intheextendedburnupreportXN-NF-84-25.

Rev.0withtheadditionoftheresultspresented inthisletterremainvalidforthefuel.Ref:(1)XN-iVF-84-25.

Revision0,Mechanical Desi.nReortSulement.forDCCookUnit1ExtendedBurnuFuelAssemblies, April1984.4(2)XN-NF-81-58

{P)(A)~Revision2.RODEX2FuelRodThermal-Mechanical ResonseEvaluation Model,March1984.