ML20290A822

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HI-STORM 100 CoC Renewal Responses to Requests for Additional Information
ML20290A822
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Site: Holtec
Issue date: 10/16/2020
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Office of Nuclear Material Safety and Safeguards
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5014911
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HISTORM100CoCRenewal ResponsestoRequestsforAdditionalInformation toHoltecLetter5014911

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RAI21Provideajustificationfortheexclusionofimportanttosafety(ITS)systems,structures,and components(SSCs)fromtheagingmanagementreviewforthosecaseswheretheSSCswerestatednot tohaveanintendedfunctionintheperiodofextendedoperation.Inlieuofajustification,revisethe agingmanagementreviewtoincludethoseSSCs.

ThefollowingsubcomponentsareidentifiedasITSintherespectivetablesoftherenewalapplication:

Table2.22oftherenewalapplication-IntendedSafetyFunctionsofMPCSubcomponents VentandDrainTube VentandDrainCap VentandDrainSleeveInserts VentandDrainCapSealWasher Table2.23oftherenewalapplication-IntendedSafetyFunctionsofHISTORMOverpack Subcomponents LidStudWasher Table2.24oftherenewalapplication-IntendedSafetyFunctionsofHITRACTransferCask Subcomponents FillPortCaps TransferLidWheelTrack TransferLidDoorStopBlock TransferLidDoorStopBlockBolt

TheapplicationindicatesthattheintendedfunctionfortheseITSsubcomponentsisN/A,whichis definedasthecomponentdoesnothaveafunctionintheperiodofextendedoperationandisNITS

[notimportanttosafety].Therenewalapplicationdoesnotprovideabasisfortheseconclusions.

Furthermore,thestaffnotesthatHISTORM100FinalSafetyAnalysisReport(FSAR),HI2002444, Revision18,Section8.3.1discussestheunloadingoperationsthatinvolvethegeneralactionsnecessary topreparethemultipurposecanister(MPC)forunloading,floodtheMPCcavity,removethelidwelds, unloadthespentfuelassemblies,andrecovertheHITRACandemptyMPC.Itisuncleartothestaffhow thefunctionsoftheMPCandHITRACsubcomponentsduringtheseactivitieswereconsideredinthe scopingevaluation.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

BelowaretheresponsespertainingtothecomponentslistedinRAI21fromTable2.22oftherenewal application:

VentandDrainTube,VentandDrainCap-TheintendedfunctionfortheseITScomponentshasbeen updatedinTable2.22toRetrievabilitysincethecomponentsservethisfunctionduringpotential systemunloadingoperationsintheperiodofextendedoperation.Additionally,thesecomponentshave beenaddedtoTable3.31aspartoftheagingmanagementreviewundertheguidanceofNUREG2214.

VentandDrainSleeveInserts-ThiscomponenthasbeenremovedfromTable2.22oftherenewal applicationsinceitsevaluationisnotrequiredbecauseitisnotacomponentthatisdescribedinthe

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FSARandisnotacomponentincludedinanylicensingdrawing.Thecomponentwasincludedinthe initialapplicationinerror.

VentandDrainCapSealWasher-ThecomponentsafetyclassificationwasdesignatedasITSinerrorin therenewalapplication.AsseeninFSARTable2.2.6,itssafetyclassificationisNITS,thishasbeen updatedinthelicenserenewalapplication.SincethesafetyclassificationshouldbeNITS,andthevent anddraincapsealwasherdoesnotimpactanyITScomponent,thesesubcomponentsarenotinscope foragingmanagement.

BelowistheresponsepertainingtothecomponentlistedRAI21fromTable2.23oftherenewal application:

LidStudwasher-TheintendedfunctionforthisITScomponenthasbeenupdatedinTable2.22to StructuralIntegrityfortheperiodofextendedoperation.Additionally,thiscomponenthasbeen addedtoTable3.32aspartoftheagingmanagementreviewundertheguidanceofNUREG2214.

BelowaretheresponsespertainingtothecomponentslistedRAI21fromTable2.24oftherenewal application:

FillPortCaps-TheintendedfunctionofthecomponenthasbeenupdatedinTable2.24tostructural integritywhichalignswiththefunctiondesignationinTable2.2.6oftheFSAR,asitwaslabeledN/A inerror.Similartothedeterminationthatthereissusceptibilitytogeneral,pittingandcrevicecorrosion forthefillportplugsinTable410ofNUREG2214,thefillportcapsarenowincludedinTable3.34of therenewalapplicationaspartoftheagingmanagementreview.

TransferLidWheelTrack,TransferLidDoorStopBlock,TransferLidDoorStopBlockBoltTheintended functionsofthecomponentshavebeenupdatedinTable2.24toStructuralIntegritysincethe componentsservethisfunctionduringpotentialsystemunloadingoperationsintheperiodofextended operation.Additionally,thecomponentshavebeenaddedtoTable3.34aspartoftheaging managementreviewtoaddresstheirsusceptibilitytogeneral,pittingandcrevicecorrosionasindicated inTable410ofNUREG2214.

BelowistheresponsepertainingtothedesignationofITSsubcomponentsintendedfunctionasN/A:

TherearenolongeranyITSsubcomponentsinthescopingevaluationwiththeintendedfunction designationofN/A.

BelowistheresponsepertainingtounloadingoperationsofMPCandHITRACcomponentslistedinthis RAI:

AnyMPCcomponentslistedinRAI21thatweredeterminedtobeinscopehavebeenaddedtothe evaluationsinChapter3todeterminecredibleagingmechanismsandanyneededagingmanagement activities.

TheHITRACcomponentslistedinRAI21haveallbeenincludedintheagingmanagementreviewand willfallintotheTransferCaskAMPfordetectionofagingeffects.

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RAI22:ProvideajustificationfortheexclusionofthePedestalPlatefortheModel100HISTORM overpackinthescopingandagingmanagementreview.

FSARTable2.2.6,MaterialsandComponentsofTheHiStorm100SystemOverpackindicatesthatthe PedestalPlate(100)andPedestalBaseplate(100S)areITSBcomponents.Table2.23,Intended SafetyFunctionsofHISTORMOverpackSubcomponents,oftherenewalapplicationidentifiesthe componentPedestalBaseplatefortheModel100Sonly.

BasedontheFSAR,itappearsthatthePedestalPlatefortheModel100iswithinthescopeofrenewal andshouldbeassessedinthescopingandagingmanagementreview.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Table2.23hasbeenupdatedtoincludetheModel100andapplicablelicensingdrawinginthe PedestalBaseplaterow,incorporatingtheModel100PedestalBaseplateintothescopingevaluation.

SincetheModel100andModel100Sarebothconstructedusingthesamematerialoptions(SA51670 orSA51570),arethesamethicknessandareexposedtothesameenvironmentintheperiodof extendedoperation,nofurtherchangesareneededtotheagingmanagementreviewchapterasTable 3.32includesthepedestalbaseplateanddoesnotspecifybetweenmodelsoftheoverpackwhich inherentlyincludesbothmodels.

RAI23:ProvideajustificationforthediscrepancybetweentheHISTORM100FSARandtherenewal applicationonthesafetyclassificationforthe100SLidWashersubcomponentoftheOverpack.

FSARTable2.2.6fortheOverpackindicatesthatthe100SLidWasherisanITSBcomponent.Table 2.23,IntendedSafetyFunctionsofHISTORMOverpackSubcomponents,oftherenewalapplication identifiesthecomponentLidWasherasaNITScomponentfortheModel100and100Soverpacks.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Table2.23hasbeenupdatedtodistinguishbetweenthesafetyclassesforthe100and100Smodels.

Themodel100remainsclassifiedasNITSsinceitdoesnotimpactanyITScomponentintheperiodof extendedoperationandwasnotincludedinFSARTable2.2.6sinceitisaNITScomponent.TheModel 100maintainstheN/Adesignationandwillnotbeincludedintheagingmanagementreview.The model100SnowhasaseparatelineinTable2.23toclarifythatthecomponentforthatmodelisITS anditsintendedfunctionintheperiodofoperationhasbeenchangedtoStructuralIntegrity.The componentforthismodelhasbeenincludedinTable3.32aspartoftheagingmanagementreviewin accordancewithTable48ofNUREG2214.

RAI24:Provideascopingevaluationand,ifnecessary,anagingmanagementreviewforHISTORM100 storagesystemSSCsthatwerenotaddressedintherenewalapplication.

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SeveralSSCsareidentifiedashavinganITSfunctioninHISTORM100FSARTable2.2.6;however,they donotappeartobeaddressedinthescopingevaluation.Theseinclude:

100SVersionBBaseShieldBlock(ITSB,Overpack)

VentandDrainTube,Optional(ITSC,MPC)

ThreadedDisc,PlugAdjustment(ITSC,MPC)

VentandDrainPlug(ITSC,MPC)

BottomFlangeGussets(HITRAC100Dand125Donly)(ITSB,HITRAC)

Inaddition,severalnonITSSCCsinFSARTable2.2.6alsowerenotaddressedinthescopingevaluation, including:

DrainLineGuideTube(NITS,MPC)

ThreadShieldCap(NITS,MPC)

RetainingRing(NITS,MPC)

NUREG-1927,Revision1providesguidancethatthescopingevaluationincludesallSSCsidentifiedinthe designbasesdocumentstoensurethattheyareproperlydifferentiatedaseitherwithinornotwithin thescopeofrenewalonthebasisofeither(1)havinganITSfunctionor(2)theyareNITS,buttheir failureaffectsanITSfunction.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

100SVersionBBaseShieldBlock-ThiscomponenthasbeenincludedinthescopingevaluationinTable 2.23andtheagingmanagementreviewinTable3.32usingtheagingmanagementguidancegivenfor thiscomponentinTable48ofNUREG2214.

OptionalVentandDrainTube,ThreadedDiscPlugAdjustment,VentandDrainPlug,DrainLineGuide Tube,ThreadShieldCap,RetainingRingThesecomponentshavebeenincludedinthescoping evaluationinTable2.22andtheirintendedfunctionislistedasRetrievabilitysincethecomponents servethisfunctionduringpotentialsystemunloadingoperationsintheperiodofextendedoperation.

Additionally,thesecomponentshavebeenaddedtoTable3.31aspartoftheagingmanagement reviewundertheguidanceofNUREG2214.

BottomFlangeGussets(HITRAC100Dand125Donly)Thiscomponenthasbeenincludedinthe scopingevaluationinTable2.24andtheagingmanagementreviewinTable3.34usingtheaging managementguidancegivenforthebottomflangeinTable410ofNUREG2214sincethebottom flangeismadeofthesamematerial,exposedtothesameenvironmentandhasthesameITS classification.

RAI25:RevisetherenewalapplicationtoreflectchangestotheHISTORM100systeminthe classificationofSSCsthathavebeenidentifiedduringtheNRCstaffsreviewofAmendmentNo.15to theCoC.

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Table1.21oftherenewalapplicationprovidesadescriptionofthescopeoftheamendment,its approvaltime,identificationoftheFSARwhichprovidesthelicensingbasis,andapointertowherethe agingmanagementprograms(AMPs)fordifferentamendmentsarelocatedinthisapplication.Thestaff notedthatAmendmentNo.15isstillcurrentlyunderNRCreview.Inaddition,thestaffnotedthatTable 2.22,Table2.23andTable2.24providetheintendedsafetyfunctionsoftheMPC,Overpackand TransferCasksubcomponents,andinsomeinstancesidentifiestheaspectsoftheHISTORM100 systemsaddressedinAmendmentNo.15.

InresponsetoNRCRAI81fortheHISTORM100CoCNo.1014AmendmentNo.15,inaletterdated April28,2020(ADAMSAccessionNo.ML20128J292),theclassificationoftheHITRACMSliftblocksand attachmentboltswereclarifiedtobeITS.However,itdoesnotappearthesecomponentsareincluded inthescopingevaluationperformedinSection2oftherenewalapplication.

FortheseandanyadditionalsafetyclassificationchangesmadeduringthestaffsreviewofAmendment 15totheHISTORM100CoC,revisetherenewalscopingandagingmanagementreviewtoaccurately reflectthedesignbasesofthestoragesystem.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

AsstatedintheresponsetotheNRCRAIreferencedabove(ML20128J292),theHITRACMSliftblocks andtheirattachmentboltsareancillarycomponents,notpartofthelicensedHITRAC.Thisissimilarto theliftyokes,MPCliftcleats,andotherancillariesthatoutsidethescopeoflicenserenewal,sincethey arenotpartofthelicense.TheuptodateversionsofthelicensingdrawingsfromAmendment15were reviewedandconfirmedthatallsubcomponentswereincludedintheSection2renewalapplication tables.

RAI26:Justifywhythesubgradematerialsurroundingthecavityenclosurecontainerofthevertical ventilatedmodule(VVM)wasnotscopedintotherenewalreview.Alternatively,includethesubgradein therenewalscopeandprovideanagingmanagementreview(AMR)andanycorrespondingAMPsor timelimitedaginganalyses(TLAAs)asnecessary.

Onsheet3ofthelicensingdrawing4501fortheHISTORM100Ustoragesystem,theapplicant identifiedthematerialsurroundingthecavityenclosurecontaineroftheVVMmoduleassubgrade.

ThismaterialiscreditedintheshieldinganalysesoftheFSAR.However,therenewalapplicationdoes notconsiderthismaterialinitsscopinganalysis.

InTable5.I.3oftheFSAR,theapplicantidentifiedthismaterialassoil.NUREG1801,GenericAging LessonsLearned(GALL)Report(ADAMSAccessionNo.ML103490041)andEPRI1015078,PlantSupport Engineering:AgingEffectsforStructuresandStructuralComponents(StructuralTools),identifythe agingeffectsforsoil,includinglossofmaterialduetoerosion,lossofformduetosettlement/cracking, andchangeinpropertiesduetolossofmoisture(desiccation).Theinformationintherenewal applicationisnotsufficientforthestafftoassessiftheseagingeffectsimpacttheshieldingfunctionof subgradematerialaspartoftheVVM.

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ThestaffneedsthisinformationtodetermineiftheHISTORM100Umeetstheregulatoryrequirements of10CFR72.240(c).

Reference:

ElectricPowerResearchInstitute(EPRI).PlantSupportEngineering:AgingEffectsforStructures andStructuralComponents(StructuralTools).EPRI1015078.PaloAlto,CA.2007.

HoltecResponse:

In accordance with NUREG1801 and NUREG2214, Table 3.32 of the renewal application has been updatedtoincludetheagingmanagementreviewofthesubgradematerialsurroundingtheVVM.Table 2.23oftherenewalapplicationhasbeenrevisedtoincludesubgradeasacomponentoftheHISTORM 100Usystem.

Additionally,100UConcreteAMPoftheapplicationhasbeenrevisedtoincludemonitoringofthesub gradeusingdoseratemeasurements.

RAI27:ClarifyandjustifythedesignbasesoftheMPCPlugsforDrilledHolesandprovidefurther informationtosupporttheiragingmanagementreview.

MPCsincludecanisterlidliftholes,whicharepluggedtoprovideradiationshielding.Initsreviewofthe renewalapplication,thestaffidentifiedpotentialinconsistenciesinthedesignbasesoftheplugsand alsoidentifiedtheneedforjustificationtosupporttheconclusionthatnoagingmanagementactivities arerequired.Asaresult,thestaffrequeststhefollowing:

1.ClarifyandprovidethetechnicaljustificationtosupportthesafetyclassificationoftheplugsasNITSin Tables2.22and3.31oftherenewalapplication.

ThestaffnotesthatHISTORM100FSARTable2.2.6classifiestheplugsasNITS;however, Drawing3923,Sheet9,identifiestheseitemsasITS(fortheoptionalliftingholeplugdesigns).

BoththerenewalapplicationandtheFSARidentifytheplugsashavingashieldingfunction.The staffnotesthetoplidofthecanisterismodeledasasolidpieceofsteelintheMCNPmodelfor theshieldinganalyses(withintheHISTORM100FSAR),andthedrilledholesonthelidwerenot modeled.Assuch,itappearsthedrilledholeplugsarecreditedintheshieldinganalyses.

2.Clarifyiftheplugsmaybeweldedbydesignand/orhavebeenweldedinexistingMPCsdueto fabricationadjustments.ThestaffnotesthatDrawing3923,Sheet9,Note2appearstoincludean optionforwelding.

3.Provideadditionalsupportfortheconclusionthatnoagingmanagementactivitiesareneededto managetheagingoftheplugs.

Table3.31oftherenewalapplicationappearstoidentifyacredibleagingeffectfortheplugs (lossofmaterialduetopitting,crevice,andmicrobiologicallyinfluencedcorrosion);however,no agingmanagementactivityisproposed.Providethebasisfornotmanagingthisidentifiedaging effect.

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Inaddition,iftheremaybeweldsassociatedwiththeplugs,providejustificationtosupportthe conclusionthatstresscorrosioncrackingisnotanagingeffectrequiringmanagement.Thestaff notesthatresidualstressesassociatedwithweldsmaymakethoselocationssusceptibleto cracking,and,asaresult,theexampleagingmanagementprogramforcanistersinNUREG2214 recommendsthatallknownweldareasbemonitoredtoensurethatthecanisterconfinement functionismaintained.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

1. ThePlugsforDrilledHoleslistedinTables2.22and3.31oftherenewalapplicationreference theplugsdescribedinZoneD4ofDrawing3923,Sheet7,andareaccuratelydescribedasNITS inbothFSARTable2.2.6andintherenewalapplication.Theseplugsdohaveashielding functionintheinitialstorageperiodandtheperiodextendedoperation,butarestillconsidered NITScomponentsasthecomponentsdonotmeetthecriteriatoqualifyasanITSA,BorC componentperNUREG/CR6407.

TheoptionalliftingholeplugdisplayedinDrawing3923,Sheet9,hasbeenaddedasanITS componenttoTable2.22aspartofthescopingevaluationandTable3.31aspartoftheaging managementreviewusingtheguidanceprovidedinNUREC1927andNUREG2214.Theseare repairplugstobeusedforliftingintheinstanceofthreaddamagetotheinitiallydrilledlifting holesandtheirprimaryfunctionisforstructuralintegrity.

2. Note2ofDrawing3923,Sheet9,isonlyapplicableforoptionalliftingholeplugstobeused fortransportationapplications(PlugDesignOptionD).Alternatively,PlugDesignOptionsA,B andCareapplicableforstorageoperationsandalloftheseplugdesignoptionsareweldedto thelidbydesignandinpractice.

ThePlugsforDrilledHolesdescribedinDrawing3923,Sheet7andintheresponseto(1.)

abovearenotweldedbydesignorinpractice.

3. Table3.31oftherenewalapplicationalreadyincludesMPCAMPasanagingmanagement activityforthestresscorrosioncrackingagingmechanismforthePlugsforDrilledHoles.As statedintheresponsein(2.)above,thePlugsforDrilledHolesarenotaweldedcomponent.

Althoughnotaweldedcomponent,Section3.2.2.5ofNUREG2214provideslanguagethat acknowledgesstresscorrosioncrackingrequiresthepresenceoftensilestresswhichcommonly existsatthecontactsbetweencomponentsandboltedstructuresforstainlesssteelcomponents inashelteredenvironment.Thisisthereasoningforincludinganagingmanagementactivityfor stresscorrosioncrackingforthePlugsforDrilledHoles.Microbiologicallyinfluencedcorrosion hasbeenremovedasanagingmechanisminTable3.31oftherenewalapplicationforthis componentsinceSection3.2.2.4ofNUREG2214concludesthatagingmanagementisnot requiredduringthe60yeartimeframeforstainlesssteelsubcomponentsinasheltered environment.Additionally,MPCAMPhasbeenincludedasanagingmanagementactivityfor thepittingandcrevicecorrosionagingmechanismssinceSection3.2.2.2ofNUREG2214 informsthatpittingandcrevicecorrosionarecredibleagingmechanismsforstainlesssteel componentsinashelteredenvironment.

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Furthermore,asseenintheresponseto(1.)above,theoptionalliftingholeplugdisplayedin Drawing3923,Sheet9,hasbeenaddedtoTable3.31oftheagingmanagementreview.This plugisaweldeditemandTable3.31nowincludesstresscorrosioncrackingasacredibleaging mechanismwhichrequiresMPCAMPasanagingmanagementactivityforthiscomponent.

Additionally,pittingandcrevicecorrosionagingmechanismshavebeenincludedascredible agingmechanismusingtheguidanceprovidedinSection3.2.2.2ofNUREG2214andMPCAMP isnowanagingmanagementactivityforthesetypesofagingmechanismsforthiscomponent.

RAI31:IdentifyanySSCsubcomponentsthathavebeenexcludedfromfurtherevaluationintheaging managementreviewbecausetheyalreadyhavetheirconditionmonitoredatsomeestablished frequency.Provideanevaluationofthecredibleagingeffectsandajustificationthattheexisting monitoringactivitiesareadequatetomanagethoseagingeffects.

Section3.2oftherenewalapplicationstates,AnySSCsubcomponentsthatdonotperformorsupport anintendedfunctionoralreadyhavetheirconditionmonitoredatsomeestablishedfrequencyare excludedfromfurtherevaluationintheagingmanagementreview(emphasisadded).

Inaccordancewith10CFR72.240,Conditionsforspentfuelstoragecaskrenewal,thesafetyanalysis reportmustprovideadescriptionoftheAMPformanagementofissuesassociatedwithagingthatcould adverselyaffectstructures,systems,andcomponentsimportanttosafety.Thestaffrecognizesthat existingsiteprocedurescanbeapartoftheagingmanagementstrategy;however,therenewal applicationshoulddemonstratethebasisfortheapproach.

Thus,itisnotcleartothestaffwhichSSCsubcomponentsalreadyhavetheirconditionmonitoredat someestablishedfrequencythatwereexcludedfromfurtherevaluationintheagingmanagement review,andifthemonitoringofthosesubcomponentsisadequatetomanagetheissuesassociatedwith aging.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Thelanguagerelatedtohavingtheirconditionmonitoredatsomeestablishedfrequencyrelatedtothe possibilityofcomponentsthatarealreadyrequiredtobereplacedatsomedefinedperiod.Insome casksthismightbeasealthatisreplacedeveryfewyears.ThiswasconsideredinthescopingoftheHI STORM100casks,however,nocomponentsonthisparticularcaskdesignweredeterminedtofallunder thiscategory.

RAI32:Provideajustificationthatlossofmaterial(precursortostresscorrosioncracking)duetopitting andcrevicecorrosioninashelteredenvironmentfortheclosureringsubcomponentoftheMPCisnot anagingeffectrequiringmanagement.

Table3.31oftherenewalapplicationstatescrackingduetostresscorrosioncracking(SCC)isacredible agingeffectfortheMPC;however,lossofmaterialduetopittingandcrevicecorrosionisnotidentified asacredibleagingeffect.Thestaffnotesthatpittingandcrevicecorrosionareconsideredprecursorsto

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SCC,andtheMPCAMPreliesoninspectionsforpittingandcrevicecorrosiontomonitortheconditionof theMPCconfinementboundary.Inaddition,otherMPCconfinementboundarycomponentsinTable 3.31(e.g.,shell,baseplate)identifyacrediblecorrosionagingmechanism.Itisuncleartothestaffwhy theclosureringappearstobemanagedinauniquemanner.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

UsingtheguidancegiveninTable47ofNUREG2214fortheclosurering,Table3.31oftherenewal applicationwasupdatedtoincludelossofmaterialduetopittingandcrevicecorrosionasanagingeffect fortheclosurering,andtoincludeMPCAMPasanagingmanagementactivityforthesetypesofcorrosion.

RAI33:Provideajustificationthatchangesindimensionduetothermalcreepofthehighburnupfuel claddinginaheliumenvironmentisnotidentifiedasanagingeffectrequiringmanagement.

Therenewalapplicationdidnotidentifychangesindimensionduetothermalcreepinahelium environmentasanagingeffectrequiringmanagement.

TheHighBurnupFuelAssemblyAMPusesthejointEPRIandDOEHighBurnupDryStorageCask ResearchandDevelopmentProject(HDRP),conductedinaccordancewithNUREG1927,Revision1to monitortheconditionofthefuelcladdingtoensureitmaintainsitsdesignbasisconfiguration.Oneof theparametersmonitoredbythatprogramisthechangeincladdingdimensionsduetocreep.As documentedinNUREG2214,Section3.6.1.3,theevidencetodatethatsupportsfuelcladding performancewithrespecttocreepisbasedonlyonshorttermtesting.Therefore,thestaffissued guidanceinAppendixDofNUREG1927,Revision1fortheuseofademonstrationprogramtoprovide confirmatorydatathatcreepwillnotchallengetheperformanceofthefuelcladding.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

UsingtheguidancegiveninTable425andSection3.61.3ofNUREG2214andAppendixDofNUREG 1927, Table 3.33 of the renewal application has been updated to add thermal creep as an aging mechanismforhighburnupfuelcladdinginaheliumenvironmentandHighBurnupFuelAMPhasbeen addedasanagingmanagementactivity.

RAI34:ProvideajustificationthatthesteelwaterjacketsubcomponentsintheHITRACsystem exposedtoawaterenvironment,asidentifiedinTable3.34oftherenewalapplication,arenotsubject tolossofmaterialduetogeneral,pittingandcrevicecorrosion.

Table3.34,AgingManagementReviewofHITRACSubcomponents,oftherenewalapplication includesthefollowingsteelsubcomponentsthatarepotentiallyexposedtoawaterenvironmentand indicatethattherearenoagingeffectsrequiringmanagementperNUREG2214.

OuterShell RadialRibs WaterJacketEndPlate LowerWaterJacketShell

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WaterJacketBottomRing WaterJacketTopPlates WaterJacketBottomPlate

ThestaffnotedthattheNUREG2214concludedthatcomponentsintheHITRACsystemexposedto demineralizedwateror25%ethyleneglycolsolutionmaybesusceptibletolossofmaterialdueto general,pittingandcrevicecorrosion,andshouldbemanagedfortheeffectsofaging.NUREG2214 providesthegenericconclusionthatsteelcomponentsexposedtomoisture(includinginshelteredor outdoorairenvironments)aresusceptibletocorrosion.Consequently,theNUREG2214ExampleAMP, TransferCasksindicatesthatagingmanagementactivitiesarenecessaryforsubcomponentsexposed continuouslyorintermittentlytoaliquidneutronshield.Thus,theapplicantsbasisforindicatingthat thesesubcomponentsexposedtoawaterenvironmentarenotsubjecttoagingeffectsrequiring managementisnotcleartothestaff.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Table3.34oftherenewalapplicationhasbeenrevisedtoincludepittingandcrevicecorrosion,and generalcorrosionasagingmechanismsforHITRACsteelsubcomponentslistedinRAI34whichare exposedtoawaterenvironment.Additionally,HITRACAMPhasbeenincludedasanagingmanagement activityforthesecomponentstoaddressthepotentialagingmechanisms.Theagingmechanismsand agingactivityincorporatedareinaccordancewiththeguidancegiveninTable410ofNUREG2214.

RAI35:ClarifythediscrepancyforthefabricationmaterialbetweentherenewalapplicationandFSAR fortheMPCUpperFuelSpacerBoltandtheOverpackLidStud.

Table3.31,AgingManagementReviewofMPCEnclosureVesselSubcomponents,oftherenewal applicationindicatesthattheUpperFuelSpacerBoltisfabricatedfromA192B8orequivalent.

However,thestaffnotedthatFSARTable2.2.6,MATERIALSANDCOMPONENTSOFTHEHISTORM100 SYSTEMMPCindicatesthattheUpperFuelSpacerBoltisfabricatedfromA193B8(orequiv.).

Table3.32:AgingManagementReviewofHISTORM100OverpackSubcomponents,oftherenewal applicationindicatesthattheLidStud,TeeHandleBolt&NutisfabricatedfromSA194,SA564640 and/orSA193B7.FSARTable2.2.6indicatesthatthelidstudandnutcomponentisfabricatedfrom SA564630orSA193B7(stud)andSA1942H(nut).Basedonthesetwoexamples,itappearstothe staffthatthereisadiscrepancyinthefabricationmaterialsidentifiedintherenewalapplicationandthe FSAR.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Table3.31hasbeenupdatedtochangetheUpperFuelSpacerBoltmaterialtoA193B8tomatchthe materialspecificationfromFSARTable2.2.6andSheet5oflicensingdrawing3923.

Table2.22and3.32havebeenupdatedtocreateseparatelinestodistinguishbetweenthelidstudand lidstudnut.ThematerialforthelidstudinTable3.32hasbeenchangedtoSA193B7/SA564630to

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matchthematerialspecificationfromFSARTable2.2.6andlicensingdrawingBM1575.Likewise,the materialforthelidstudnutinTable3.32hasbeenchangedtoSA1942Htomatchthematerial specificationfromFSARTable2.2.6andlicensingdrawingBM1575.

RAI36:Clarifythediscrepancyregardingthetwodifferentagingmanagementapproachesforthetwo subcomponentsmadeofHoltiteA.Provideadditionaljustificationforwhycrackingduetoradiation embrittlement,lossoffracturetoughnessandlossofductilityduetothermalaging,andlossofshielding duetoborondepletionarenotcredibleagingeffectsfortheseHoltiteAcomponentstobeaddressedby atimelimitedaginganalysis/agingmanagementprogramorasupportinganalysis.

Table3.34:AgingManagementReviewofHITRACSubcomponents,oftherenewalapplication includesseveralAMRitemsforsubcomponentsfabricatedfromHoltiteAthatarenotevaluatedina consistentmanner.

FortheAMRitemsassociatedwiththeTopLidShielding,theapplicationdoesnotidentifya thermalorradiationrelatedagingeffect(onthebasisoflaboratorytesting)andindicatesthat thecurrentlicensingbasisdoesnotincludeaspecifictimebasedevaluationofthematerial,so thereisnoanalysistomeettherequirementstobeclassifiedaTLAA.Therefore,theapplication concludedthatnoAMPorTLAAisrequired.

FortheAMRitemsassociatedwiththeTransferLidDoorShielding,theapplicantproposedthe HITRACHoltiteMaterialTLAAastheagingmanagementactivitytoaddressradiation embrittlement,thermalaging,andborondepletion.

Itisnotcleartothestaffwhatthebasisisforthetwodifferentagingmanagementactivitiesforthetwo subcomponentswhicharemadeofthesamematerial.Also,whiletheTransferLidDoorShieldingline itemsreferencetheHITRACHoltiteMaterialsTLAA,thatTLAAisnotdescribedanywhereinthe application.

Inaddition,NUREG2214identifiescrackingduetoradiationembrittlement,lossoffracturetoughness andlossofductilityduetothermalaging,andlossofshieldingduetoborondepletionascredibleaging effectsfortheseHoltiteAcomponentstobeaddressedbyatimelimitedaginganalysis/aging managementprogramorasupportinganalysis.

BasedonitsreviewofHoltecReportHI2002420,HoltiteA:ResultsofPreandPostIrradiationTests andMeasurements,Revision1,itisnotcleartothestaffhowtheresultsfromthisstudy(1) demonstratethattheshieldingfunctionofthesecomponentsarenotchallengedwhenconsideringthe credibleagingeffectsand(2)areboundingoftheconditionsthesecomponentsareexposedtooverthe proposedperiodofextendedoperationintermsofradiationfield/fluxandtemperatures.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

TheagingmanagementactivityfortheTransferLidDoorShieldingsubcomponentinTable3.34ofthe renewalapplicationhasbeenupdatedtokeepitconsistentwiththeagingmanagementactivityofTop LidShielding.

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Reference[3.3.5]wasaddedtotheSection3.6referencesandreferencedinparagraph3.3.4.5ofthe renewalappasaformofsupportinganalysistoaddresspotentialagingmechanismsforHoltiteA,thusno longerrequiringHITRACHoltiteMaterialTLAAs.Reference[3.3.5]andHI2002420,whichisreferenced in[3.3.5],summarizethequalificationtestsrequiredtocharacterizetheperformanceofHoltiteAasa shieldingmaterial.ThereportsshowthatHoltiteAdemonstratedhydrogenretentionafterthermalaging andexposuretohightemperatureandneutronandgammaradiation,therebyprovingtobeeffectivefor neutronshieldingapplicationinthecask.[

PROPRIETARYINFORMATIONWITHHELDPER10CFR2390

]Thus,theabovereferencedreportsshow bounding conditions for HoltiteA qualification tests in terms of radiation flux and temperature and concludethatHoltiteAisthermallystableforuseinHISTORM100caskandissuitablefortheradiation exposureexpectedthroughouttheperiodofextendedoperation.

RAI37:ProvidethelanguageforthefootnotesinTable3.32oftherenewalapplication.

Table3.32:AgingManagementReviewofHISTORM100OverpackSubcomponents,oftherenewal applicationhasastatementthatthistableincludesfootnotes.However,itdoesnotappeartothestaff thatTable3.32oftherenewalapplicationprovidesthelanguageforfootnotes1through3.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Thenumberoffootnoteswasreducedto2andlanguagewasprovidedinthefootnotesfortheir applicabilityasfollows:

Note1:Thetermembeddedreferstothefactthattheindividualcomponentismechanicallysealed andisnotexposedtoanyenvironment.

Note2:Thetermgeneralcorrosionreferstolossofmaterialduetocorrosion,proceedingat approximatelythesamerateoverametalsurface,alsoreferredtoasuniformcorrosion.

RAI38:ProvideajustificationthattheinsulationmaterialfortheHISTORM100Usystemdoesnot requireagingmanagementduringtherenewalperiod.

Table3.32AgingManagementReviewofHISTORM100OverpackSubcomponents,oftherenewal applicationindicatesthatInsulationthatisembedded(steel)isnotsubjecttoagingeffectsrequiring management.

FSARSection3.I.4.1indicatesthatthisinsulatormaterialiseitherKaowoolceramicfiberinsulationor alternatively,aHoltecapprovedequivalentthatmeetstheacceptancecriteriasetforthinFSARSection 3.I.4.1.

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TherenewalapplicationdoesnotprovideabasisforwhytheinsulationmaterialfortheHISTORM100U systemdoesnotrequireagingmanagementduringtherenewalperiod.Althoughtherenewal applicationcitesNUREG2214asabasisforitsconclusion,thestaffnotedthatTable48ofNUREG2214 indicatesthatcrackingduetoradiationembrittlementmaybeanagingeffectrequiringmanagementfor ceramicfiberinsulation.Further,Section3.5.2.1ofNUREG2214providesguidancethatareviewofthe radiationeffectsisperformedonacasebycasebasisoftheinsulationmaterialandthattheapplication addressesthispotentialagingeffect.

Thisinformationisneededtoevaluatecompliancewith10CFR72.240(c).

HoltecResponse:

Table3.32oftherenewalapplicationhasbeenupdatedtospecifythatKaowoolceramicfiberinsulation (orequivalent)istheinsulationmaterialbeingconsideredandusingtheguidanceprovidedinTable48 of NUREG2214, Table 3.32 of the renewal application has been revised to include radiation embrittlementasanagingmechanism.SupportinganalysisfornotperformingaTLAAorAMPforthe materialhasbeenprovidedinparagraph3.3.2.5oftherenewalapplication.

RAI39:ForallAMRlineitemsthatidentifycorrosionasacredibleagingmechanismthatleadstoloss ofmaterial,provideadditionaldetailsonthespecificcorrosionmechanism(s)tobemanaged.

Tables3.31,3.32,and3.34oftherenewalapplicationincludelineitemsforlossofmaterialdueto corrosion.Nodetailonthespecificcorrosionrelatedagingmechanismisprovided.TheAMPs incorporatethesetablesoftherenewalapplicationbyreferencetodefinethescopeoftheinspections.

AsnotedinNUREG1927,Revision1,Section3.1,itisoftennecessarytoidentifytheagingmechanisms thatarepotentiallyatworktoeffectivelymanageanagingeffect.Forexample,theidentificationof crediblelocalizedcorrosionmechanismsmayinformandprioritizehowinspectionsseekoutspecific crevicelocationsordissimilarmetalcontactsandhowvisualinspectionparameters(e.g.,lighting, distance)areestablishedtoensurethedegradationcanbedetected.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

Tables 3.31, 3.32 and 3.33 of the renewal application have been revised to include credible aging mechanisms for loss of material. All the aging mechanisms incorporated are in accordance with the guidanceprovidedinTables47,48and410ofNUREG2214.

RAI310:ProvideajustificationfortheconclusioninTable3.32oftherenewalapplicationthatthe steel100UContainerShellBottomPlate,whichisembeddedinconcrete,doesnotrequireaging management.

Table3.32,AgingManagementReviewofHISTORM100OverpackSubcomponents,oftherenewal applicationindicatesthatthesteelContainerShellBottomPlateisexposedtoanembedded(concrete) environmentandisnotsubjecttoagingeffectsrequiringmanagement.TheapplicantcitesNUREG2214 asthebasisforitsconclusion.

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However,thestaffnotedthattheNUREG2214concludedthatforthissubcomponentexposedtoan embedded(concrete)environment,maybesubjecttolossofmaterialduetogeneral,pittingand crevicecorrosionwhentheconcreteissubjecttowateringress.Furthermore,NUREG2214provides guidancethataTLAA/AMPorasupportinganalysisforagingmanagement.Thus,theapplicantsbasis fornotmanagingtheeffectsofagingfortheContainerShellBottomPlateisnotclear.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

UsingtheguidanceprovidedinTable48ofNUREG2214,Table3.32therenewalapplicationhasbeen revisedtoincludetherecommendedagingmechanismsforcontainershellbottomplate.Element4, OverpackAMPElement4DetectionofAgingEffectsoftherenewalapplicationhasbeenupdatedto includeinspectionoftheISFSIpaddirectlyadjacenttotheoverpack,whichgivesindicationifinaccessible surfaces of the overpack, including components like container shell bottom, will require additional inspections.

RAI311:Provideanagingmanagementreviewand,ifnecessary,theagingmanagementapproachthat addressestheOverpackBaseplateandPedestalBaseplateincontactwiththeconcretepad.

Table3.32oftherenewalapplicationincludesanagingmanagementreviewforthesteelOverpack BaseplateandPedestalBaseplateisexposedtoashelteredandairoutdoorenvironment,respectively.

However,itisunclearwhethertheAMRitemsintherenewalapplicationaddresstheportionsofthe baseplatesthatareincontactwiththeconcretepad.ThestaffnotesthatNUREG2214concludedthat steelembeddedinconcretemaybesubjecttolossofmaterialduetogeneral,pitting,andcrevice corrosioniftheenvironmentmayallowwateringress.Specifically,Table64ExampleAging ManagementProgramforMonitoringofMetallicSurfacesofNUREG2214indicatesthatthecondition ofmetallicsurfacesincontactwithconcrete(i.e.,overpack/caskbottoms)areassessedwithvisual inspectionsonajustifiedfrequencyandsamplesize.

Iftheagingmanagementreviewidentifiesacredibleagingeffect,providetheapproach,includinga basis,thatwillbeusedtomanagethesesurfaces(e.g.,inspectionsofadjacent,accessible,surfaces; inspectionofpadforsignsofcorrosionstaining;periodicoropportunisticinspectionsofbottom surface).

HoltecResponse:

InaccordancewithHoltecDrawing3669,pedestalbaseplateisnotincontactwiththeconcretepad.Per Table64ofNUREG2214,OverpackAgingManagementPrograminAppendixAoftherenewalapplication hasbeenrevisedtoincludeinspectionofoverpackinaccessiblesurfacesandtheISFSIpadsurrounding the overpack. Inspection of the ISFSI pad directly adjacent to the overpack provides indication that inaccessiblesurfacesoftheoverpack,includingcomponentsliketheoverpackbaseplate,mayrequire additionalinspections.

RAI312:ProvideajustificationthatlossofstrengthduetothermalagingofthealuminumBasketShims andSolidShimsfortheMPC68M/32Mdoesnotrequireagingmanagementduringtherenewalperiod.

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Table2.22indicatesthattheBasketShimsandSolidShimsfortheMPC68M/32Mhaveastructural integrityandheattransferintendedfunction.Further,Table3.31indicatesthatthesesubcomponents arefabricatedfromaluminumandtherearenoagingeffectsrequiringmanagement.

ThestaffnotedthatSection3.2.3.7ofNUREG2214indicatesthatthemicrostructuresofmany aluminumalloysmaychange,givensufficienttimeattemperatureandiscommonlycalledthermal aging.Theeffectofthethermalagingonmechanicalpropertieswilldependonthetimeattemperature andthemicrostructureandchemicalcompositionofthealuminumcomponents.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

PerSubsections3.4.4.3.1.8and3.3.2.6oftheFSARandSubsection3.III.4.12.2oftherenewalapplication, thealuminumalloybasketshimsandsolidshimsusedintheMPCdonotbearanyloadundernormal conditionsofstorageexceptforanyshorttermoperationswhenthecaskistransferredhorizontallyand theshimsaresubjectedtolateralaccelerationfromthefuelbasketandcontainedfuel.Additionally,Table 2.22oftherenewalapplicationhasbeenrevisedtoremovestructuralintegrityasanintendedfunction forbasketshimsandsolidshims.FromTable32ofNUREG2214,thermalagingisonlyconsideredcredible forloadbearingcomponents.Sincethebasketshimsandsolidshimsdonotbearanyloadduringthe periodofextendedoperation,thermalagingisnotconsideredacredibleagingmechanismforthese componentsintherenewalapplication.

RAI313:Provideajustificationthatlossofmaterialduegeneral,pittingandcrevicecorrosionofthe steelHISTORM100OverpackShieldShellcomponentdoesnotrequireagingmanagementduringthe renewalperiod.

Table3.32oftherenewalapplicationindicatesthatthesteel(SA51670)ShieldShellisexposedtoa shelteredenvironmentandisonlysubjecttolossofmaterialpropertiesduetoradiation.Thestaffnoted thatsteeloverpackcomponentsexposedtoashelteredenvironmentmaybesubjecttoadditionalaging effectsthatrequireagingmanagementduringtherenewalperiod.Specifically,thestaffnotedthat NUREG2214Sections3.2.1.1and3.2.1.2concludedthatlossofmaterialduegeneral,pittingandcrevice corrosionmaybeapplicableagingeffectsforsteelcomponentsexposedtoashelteredenvironmentdue tothepotentialpresenceofmoistureintheshelteredenvironment.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

Table3.32oftherenewalapplicationliststheenvironmentoftheshieldshellasshelteredinerror.The shieldshellwasremovedfromthedesigninJuneof2001,andinolderversionsoflicensingdrawing1495 itcanbeseenthattheshieldshellenvironmentisactuallyembeddedinconcrete.Moreover,Table48of NUREG2214specifiesthattheshieldshellisembeddedinconcrete.Assuch,Table3.32oftherenewal applicationhasbeenupdatedtochangetheenvironmentoftheshieldshelltoEmbedded(concrete).

For the potential aging mechanisms listed in RAI 313, the embedded concrete environment is fully encasedandisnotsubjecttowateringresswhichhasthepotentialtocausegeneralcorrosion,pittingand crevicecorrosion,andmicrobiologicallyinfluencedcorrosionofthecomponent.Therefore,thesetypesof

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corrosionhavenotbeenincludedascredibleagingmechanismsinTable3.32oftherenewalapplication forthiscomponent,whichisinagreementwithTable48ofNUREG2214.

MPCandOverpackAMPsRAI#1:Provideajustificationforthestatementthat,inlieuofasitespecific inspectionoftheDryCaskStorageSystem(DCSS),asitemaychoosetotakecreditforaninspection doneatadifferentsite.Otherwise,revisetherenewalapplicationsuchthattheMPCAMPandOverpack AMPonlytakecreditforsitespecificinspectionsoftheHISTORM100System.

AsdescribedintheAppendixAoftherenewalapplication,theMPCAMPandOverpackAMPindicate thatinlieuofasitespecificinspectionoftheDryCaskStorageSystem(DCSS)asitemaychoosetotake creditforaninspectiondoneatadifferentsite(i.e.,surrogateinspections),aslongastheinspection canbeshowntohavebeenperformedonareasonablycomparableorboundingcanisterandoverpack.

TheNRCreviewofNuclearEnergyInstitute(NEI)1403Revision2,Format,Contentand ImplementationGuidanceforDryCaskStorageOperationsBasedAgingManagement(ADAMS AccessionNo.ML18325A207)statesthattheNRCdoesnotbelievethereissubstantialoperating experienceforcanisterexaminationsforthevarioussusceptibilityrankingstounderstandhowthe susceptibilityassessmentsmaybeapplied,andsurrogatesused,acrosstheindependentspentfuel storageinstallationfleet.ForotherSSCs(e.g.,overpack),theNRCcommentsstatethattherearelimited AMPinspectionresultsandnoindustryguidancefordeterminingwhichSSCsmaybeappropriateforthe useofsurrogateinspections.Bothaguidancedocumentthatconsiderstheeffectsofenvironmentaland operationalparametersonagingeffectsandoperationalexperiencegainedfromconductingAMP inspectionsareconsiderednecessaryforidentifyingpotentialsurrogatesforSSCsotherthanstorage canisters.

GiventhelimitednumberofinspectionsthathavebeenperformedatsitesthatutilizetheHISTORM 100System,theapplicantsbasisfortakingcreditforaninspectiondoneatadifferentsiteaspartofthe MPCAMPandOverpackAMPisnotcleartothestaff.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

MPCAMPandOverpackAMPoftherenewalapplicationwereupdatedtoonlytakecreditforsitespecific inspectionsoftheHISTORM100system.

MPCAMPRAI#2:

IncludeexaminationmethodsintheMPCAMPthatarecapableofidentifyingandcharacterizingstress corrosioncracksorprovideajustificationforhowtheAMPisotherwisecapableofmanagingthis degradationmechanism.Further,describeandprovideajustificationforthecriteriathatwillbeusedby theinspectortodetermineifselectedareasoftheMPCmaybeupgradedtoanondestructive examinationtechniquethatiscapableofidentifyingandcharacterizingstresscorrosioncracks.

ProgramElement4,DetectionofAgingEffectsoftheMPCAMPstates,inpart,thefollowingmethods willbeusedtomanagepittingcorrosionandstresscorrosioncracking:

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AvisualinspectionoftheMPCsurfaceshallbeperformedusingaborescope(orequivalent)

ThisvisualinspectionshallmeettherequirementsofaVT3Examination

Atthediscretionoftheinspector,theinspectionofselectedareasontheMPCmaybeupgraded totheVT1standard,asdescribedinASMESectionXI,ArticleIWA2200,totheextentpractical.

Thestaffnotedthatthevisualinspectionmethods,alone,arenotgenerallyconsideredtobecapableof identifyingandsizingpittingcorrosionandstresscorrosioncracking.Inaddition,thedescriptionofthe MPCAMPdoesnotexplainorprovideajustificationforthecriteriathatwillbeusedtobytheinspector todetermineifselectedareasmaybeupgradedtoaVT1inspection.

NUREG2214(seeTable62,ExampleAgingManagementProgramforLocalizedCorrosionandStress CorrosionCrackingofWeldedStainlessSteelDryStorageCanisters)andAgingManagementGuidance toAddressPotentialChlorideInducedStressCorrosionCrackingofWeldedStainlessSteelCanisters, Report3002008193,containsguidancetoincludeacombinationofvisualinspectionsandfollowup surfaceorvolumetricexaminationstodeterminethepresenceandextentofpitting/crevicecessionand stresscorrosioncracking.Intheseguidancedocuments,visualinspectionsarenotreliedontoidentify pitting/crevicecorrosionandcracking.Rather,theyareusedtoperformaninitialscreenforareasof corrosionthatmaybeaprecursortocracking.Suspectareasarefurtherexaminedwithtechniques capableofidentifyingandsizingcrackstosupportanengineeringevaluationofcanisterintegrityand confinement.

Absentanexaminationmethodcapableofcharacterizingstresscorrosioncracks,itisuncleartothestaff howtheproposedinspectionactivitieswillbecapableofidentifyingandrespondingtocracking.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

InaccordancewiththeguidanceprovidedinTable62ofNUREG2214,theMPCAMPoftherenewal applicationhasbeenupdatedtoincludethevisualexaminationmethodsusedtodetectsuspectareas that may require further evaluation and the volumetric, surface and visual (remote only) inspection techniques which are utilized for determining the presence and extent of localized pitting/crevice corrosionandstresscorrosioncracking..

See Element 4 of MPC AMP, Detection of Aging Effects, for inclusion of volumetric and surface examinationstobeconducted.

MPCAMPRAI#3:ProvideajustificationthattheMPCAMPwillonlyincludeinspectionsononecanister ateachsitethatusestheHISTORM100Systemregardlessofthesusceptibilityofthesitetolocalized corrosionorSCC.Otherwise,revisetheMPCAMPtoincludecriteriafordeterminingtheinspection populationbasedonsusceptibilityatasite,includingcriteriaforreevaluatingtheinspectionpopulation.

ProvideajustificationthatthissusceptibilitycriteriaprovidesadequateagingmanagementoftheMPCs.

Programelement4,DetectionofAgingEffects,oftheMPCAMPstatesthattheinspectionshallbe performedononecanisterateachsitethatusestheHISTORM100Systemandprovidesreferencesthat willbeusedfortheselectioncriteria.

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Table62oftheMAPSReportstatesthatforsitesconductingacanisterexamination,thereshouldbea minimumofonecanisterexaminedateachsite.Preferenceshouldbegiventothecanisterswiththe greatestsusceptibilityforlocalizedcorrosionorSCC.ThestaffnotedthatASMECodeCaseN860, InspectionRequirementsandEvaluationStandardsforSpentNuclearFuelStorageandTransportation ContainmentSystems,providescriteriatodeterminetheinspectionpopulationbasedonsusceptibility atthesite,includingcriteriaforreevaluatingtheinspectionpopulation.

ThestaffnotedthattheMPCAMPdoesnotprovidesusceptibilitycriteriafordeterminingtheinspection populationofcanistersatsitesthataremoresusceptibletolocalizedcorrosionorSCC.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

MPCAMPoftherenewalapplicationhasbeenrevisedtoincludeaminimumofonecanisterforinspection withoutfurtheranalyzation.TheMPCAMPalreadyindicatesthattheselectioncriteriaforthecanisterto inspect shall use the EPRI Technical Report 300200537 susceptibility criteria shall which provides a technical basis to evaluate and score canister and site susceptibility to localized corrosion (chloride inducedSCC)whichisconsideredtobethemostcredibleandboundingagingmechanismthatmight challengethestructuralintegrityoftheMPC.Additionally,thewordinghasbeenupdatedintheMPCAMP tospecifytheASMECodeCaseN860criteriafordeterminingtheinspectionpopulation.

MPCandOverpackAMPsRAI#4:Provideajustificationthatthetrendingofdegradationidentifiedby theMPCAMPandOverpackAMPisnotrequired.Inlieuofajustification,providethecriteriaandbasis, thataninspectorwillusetodeterminewhetherindicationswillbeidentifiedanddocumentedfor subsequentinspections,andidentifiedfortrendingpurposes.

Programelement5,MonitoringandTrendingoftheMPCAMPstateschangestothesizeandlocation ofanyareasofdiscoloration,localizedcorrosion,and/orstresscorrosioncrackingshouldbeidentified anddocumentedforsubsequentinspections.(emphasisadded)

Programelement6,AcceptanceCriteriaoftheOverpackAMPstatesthatfortheoverpackexternal andinternalsurfaces,minorrustspotsorindicationsofdegradedcoatingsdonotrequirefurther evaluationsincetheydonotcompromisetheabilityoftheoverpacktomaintainitsfunction,butshould beidentifiedfortrendingpurposes.(emphasisadded)Thestaffnotedthattrendingofdegradation identifiedbytheMPCAMPandOverpackAMPappearstobelefttothediscretionoftheinspector, ratherthanensuringtheseconditionsaredocumentedandtrendedtoensuretheirprogression,ifany, ismonitored.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

ThewordingofMPCAMPandOverpackAMPoftherenewalapplicationwasupdatedtospecifythe criteria and basis for the inspector to identify the indications and document them for subsequent inspections.

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MPCAMPRAI#5:RevisetheMPCAMPtoclarifyiftheexaminationsincludeknownareasofthe canistertowhichtemporarysupportsorattachmentswereattachedbyweldingandsubsequently removed.Ifnot,provideatechnicaljustificationforwhytheseareasarenotconsideredsusceptibleto chlorideinducedstresscorrosioncracking.

Programelement3,ParametersMonitored/InspectedoftheMPCAMPstatesthatexaminationsof theMPCAMPfocusonaccessiblecanisterweldsandweldheataffectedzones.However,asnotedin NUREG2214,otherknownareasofthecanistertowhichtemporarysupportsorattachmentswere attachedbyweldingandsubsequentlyremoved(basedonavailablefabricationrecords)maybe susceptibletolocalizedcorrosionandchlorideinducedstresscorrosioncracking.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

MPCAMPoftherenewalapplicationhasbeenupdatedtoincludetheinspectionofareasofthecanister towhichtemporarysupportsorattachmentswereattachedbyweldingandsubsequentlyremovedin accordancewiththeguidancegiveninTable62ofNUREG2214.

OverpackAMPRAI#1:Specifytheextent(i.e.,coveragearea)oftheexaminationsthatwillbe performedforthenormallyaccessibleexternalandinternalsurfacesoftheoverpackandprovidea justificationthattheywillbesufficienttoprovideadequateagingmanagementoftheoverpack.

Programelement3,ParametersMonitored/Inspected,andprogramelement4,DetectionofAging EffectoftheOverpackAMPindicatesthattheoverpackexternalAMPisavisualinspectioninorderto detectanyagingeffectsandthatvisualinspectionoftheoverpackannularspaceandtheinteriorareas oftheventsshallbeperformedusingaborescope(orequivalent).

ThestaffnotedthattheOverpackAMPdoesnotspecifytheextent(i.e.,coveragearea)ofthe examinationsthatwillbeperformedfortheaccessibleexternalandinternalsurfacesoftheoverpack.In addition,thestaffnotedthattheOverpackAMPdoesnotspecifytheexaminations,includingthe extent,ofthenormallyinaccessiblesurfaces/areasoftheexternalandinternaloftheoverpack.NUREG 2214providesguidanceassociatedwiththeagingmanagementactivitiesandinspectionstobe performedontheontheoverpack.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

OverpackAMPoftherenewalapplicationhasbeenrevisedtoincludeextentoftheexaminationthatwill beperformedonnormallyaccessibleandinaccessiblesurfacesoftheoverpack.

PertheupdatedOverpackAMP,allnormallyaccessibleexternalandinternalsurfacesoftheoverpack shallbevisuallyinspected.Anyinaccessiblesurfaceslikecontainerbaseplateandcaskbottomsshallbe inspectediftheISFSIpadsurroundingthecaskshowsanyevidenceofcorrosionordegradation.Thus,the updatedOverpackAMPprovidesanadequateagingmanagementoftheoverpack.

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OverpackandTransferCaskAMPsRAI#2:RevisetheOverpackAMPandTransferCaskAMPtoprovide specific,actionableacceptancecriteriaagainstwhichtheneedforcorrectiveactionswillbeevaluated.

TheacceptancecriteriafortheOverpackAMPincorporatesqualitativeacceptancecriteria(i.e.,minor rustspotsorindications).Inaddition,theacceptancecriteriafortheTransferCaskAMP,insome instances,incorporatesqualitativeacceptancecriteria(i.e.,(1)Alllidsurfacesshallberelativelyfreeof dents,scratches,gouges,orotherdamage,and(2)Liftingtrunnionsshallbefreeofdeformation,cracks, damage,corrosion,andexcessivegalling);however,thestaffnotedthat,whenusingqualitativecriteria, theyshouldbesufficientlycleartoreasonablyensurethatasingulardecisionisderivedbasedonthe observedcondition,avoidingtheuseofambiguousphrases(e.g.,minor,significant,moderate).NUREG 1927,Revision1,Section3.6.1.6notesthattheAMPacceptancecriteriashouldbeachievableand actionableandavoidtheuseofnonquantifiableterms,andAppendixAnotesthatnonquantifiable termsusedinreferencetoagingeffectsshouldbereplacedbyeitherquantitativeinformation,if available,orfurtherdescribedordefined.NEI1403,Revision2,states:

IftheAMPimplementationproceduresdonotincludeactionableacceptancecriteria,the subjectivecriteriaforpersonneltodetermineadditionalassessmentorevaluationofafindingis requiredviathecorrectiveactionprogramshouldbesufficientlyconservativetoensurevirtually anyunexpectedfindingisreviewedfurther.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

InaccordancewiththeguidancegiveninNUREG1927andNUREG2214,OverpackAMPandTransferCask AMPoftherenewalapplicationwererevisedtoremoveanynonquantifiableorambiguoustermsand includethespecificactionableacceptancecriteriaforevaluationofcorrectiveactions.

HITRACAMPRAI#1:ProvideclarifyinginformationonhowseveralHITRACSSCswillbemanagedfor aging.

ThestaffidentifiedseveralaspectsoftheHITRACAMPthatrequireclarifyinginformationinorderto completeitsreviewoftheagingmanagementapproachforthetransfercask,asfollows:

1.ClarifyiftheexternalsurfacesmonitoredbytheAMPincludetheentiretyoftheinsidecavityof thetransfercaskexposedtoair(e.g.,innershell).Ifnot,statehowtheAMPmanagestheagingof thoseSSCs.

2.Ifapplicable(basedontheresponsetoRAI34),statehowtheAMPmanagestheinaccessible portionsofthetransfercaskthatarecontinuouslyorintermittentlyexposedtotheliquidneutron shield.

3.IntheDetectionofAgingEffectprogramelement,clarifyiftheprogrammanagesfortrunnion wear,asindicatedinTable3.34oftherenewalapplication.ThisAMPelementstatesonlythat theprogrammanagesforcorrosion.

4.Statehowvisualinspectionparameterswillbecontrolledtoensurethatthereissufficient resolutionandlighting.GiventhattheAMPdoesnotuseconsensuscodecriteriathatmayhave

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suchdetail,describeeithersiteoperationpracticesorAMPspecificrequirementsthatwillbe usedtoestablishresolutionandlightingrequirementsfortheHITRACinspections.

Programelement3,Parametersmonitored/inspectedoftheTransferCaskAMPstatesthatthe parameterinspectedbytheTransferCaskAMPisvisualevidenceofdegradationofexternalsurfacesof theTransferCaskandtrunnions(emphasisadded).Inaddition,programelement4,DetectionofAging EffectsoftheTransferCaskAMPindicatesthattheprogrammanageslossofmaterialduetocorrosion, predominatelyforcoatedsteelcomponents;however,thestaffnotedthattheliftingtrunnionsmaybe subjecttolossofmaterialduetowear.

Table66,ExampleAgingManagementProgramforTransferCasksoftheMAPSReportindicatethat theprogramshouldmonitortheconditionofinternalandexternalsteelsurfacestoidentifygeneral, pitting,crevice,andgalvaniccorrosion,andwearandthatalltransfercasksaretobeinspected.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

Responsestoalltheindividualcommentsareprovidedbelow.InaccordancewithTable66ofNUREG 2214andTable3.34oftherenewalapplications,thefollowingchangesweremadetotheHITRACAMP.

1. AMPwasupdatedtoincludetheinteriorcavityofthecaskwhichwillbemonitoredbytheAMP.
2. Inspection of inaccessible areas of the transfer cask that are continuously or intermittently exposedtotheliquidneutronshield,wereincludedintheAMP.
3. Wearwasincludedasanagingmechanismforliftingtrunnions.
4. TheAMPwasupdatedtoincludetheASMErequirementsforvisualinspectionofaccessibleand nonaccessibleareasofthetransfercask.ThereferencedASMErequirementsprovidedetailsof lightingandresolutionrequiredduringvisualinspection.

HighBurnupFuelAssemblyAMPRAI#1:Clarifywhatismeantbyacceptablemoisturecontentas describedintheacceptancecriteriafortheHighBurnupFuelAssemblyAMP.Provideajustificationthat thisacceptancecriteriaisadequateforagingmanagementofcomponentswithinthescopeofthis program.

Programelement6,AcceptanceCriteriaoftheHighBurnupFuelAssemblyAMPstatesMoisture content-themoisturecontentinthecanister(accountingformeasurementuncertainty)shouldbe determinedtobeacceptable.

Table67,ExampleAgingManagementProgramforHighBurnupFuelMonitoringandAssessment,of NUREG2214,ManagingAgingProcessesInStorage(MAPS)Report,indicatesthatthemoisture contentinthecask/canister,accountingformeasurementuncertainty,shouldbelessthantheexpected upperboundmoisturecontentperthedesignbasesdryingprocess.Itfurtherstatesifthedesignbases dryingprocessinvolvesavacuumdryingmethodofevacuatingacask/canistertolessthanorequalto3 torrandmaintainingaconstantpressurefor30minutesafterthecask/canisterisisolatedfromthe vacuumpump,theexpectedwatercontentisabout0.43grammole.Theacceptancecriteriaforthe HighBurnupFuelAssemblyAMPrelatedtomoisturecontentisnotclearanddoesnotdefinewhatis consideredacceptable.

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Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

UsingtheguidancegiveninTable67ofNUREG2214,themoisturecontentacceptancecriteriahasbeen updatedfortheHighBurnupFuelAssemblyAMPintherenewalapplication.

100UConcreteAMPRAI#1:(1)Provideajustificationthatgroundwaterchemistrymonitoringofthe 100UConcreteAMPcandirectlymanageconcretedegradation.Otherwise,revisetherenewal applicationandclarifythepurposeofthegroundwaterchemistrymonitoringofthe100UConcrete AMP.(2)Provideandjustifytheacceptancecriteriathatwillbeusedbythe100UConcreteAMPto determinewhetherthegroundwaterchemistryisaggressive,whichmaywarrantcorrectiveactionssuch asincreasedgroundwatermonitoring.

Programelement3,ParametersMonitored/Inspected,ofthe100UConcreteAMPstatesfor inaccessibleareas,groundwatermonitoringisperformedevery5yearsforevidenceofconcrete degradation.Programelement4,DetectionofAgingEffects,ofthe100UConcreteAMPstates

[g]roundwatermonitoringperformedevery5yearswilldetermineifanydegradationofthesystem frominaccessibleareasisoccurring.Basedonthedescriptionintheseprogramelements,itappearsto thestaffthatthe100UConcreteAMPisrelyingdirectlyongroundwatermonitoringtoidentifyconcrete degradation.Rather,thestaffnotedthatthepurposeofthegroundwaterchemistrymonitoringisto identifyconditions(i.e.,aggressiveenvironment)thatisconducivetobelowgrade(underground)aging mechanisms.Thus,itisnotclearhowthegroundwaterchemistrymonitoringofthe100UConcreteAMP directlymanagesconcretedegradation.

Programelement6,AcceptanceCriteriaofthe100UConcreteAMPstates[a]nygroundwater indicationsofconcretedegradationwillbeenteredintothecorrectiveactionprogram.However,the staffnotedthattheapplicantdidnotspecifythecriteriathatwillbeusedtodeterminewhetherthe groundwaterchemistryisconsideredaggressiveandmaywarrantcorrectivesactions,suchasincreased groundwaterchemistrymonitoringorotherremedialsteps.ThestaffalsonotedthatNUREG2214 providesguidanceforestablishingacceptancecriteriaforgroundwaterchemistrymonitoring.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

In accordance with the guidance provided in Table 63 of NUREG2214, 100U Concrete AMP of the renewalapplicationhasbeenrevisedtoincludethepurposeofgroundwaterchemistryprogramandan acceptancecriteriatodeterminewhethergroundwaterchemistryisaggressive.

100UConcreteAMPRAI#2:ClarifywhethertheHISTORM100UndergroundSystemincludes inspectionsoftheinaccessibleareasofthepadconsistentwithACI349.3R.Ifnot,providejustification thatthisACIcodeactivityisnotneededtomanagetheagingoftheinaccessiblesurfaces.

ProgramElement4,DetectionofAgingEffects,ofthe100UConcreteAMPstatesthatthevisual inspectionisconductedannuallybyanindividualmeetingthequalificationrequirementsofperACI349, andincludesallaccessibleareasonthepad.However,therenewalapplicationdidnotaddress inspectioncoverageoftheinaccessibleareasofthepad.

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ACI349.3R18,ReportonEvaluationandRepairofExistingNuclearSafetyRelatedConcrete Structures,Chapter6,EvaluationFrequency,indicatesthat,forstructureswithnonaggressive exposures,representativesamplesofbelowgradeconcretebeexaminedwhenexcavatedforany reason.Section3.4ofACI349.3Rstatesthatthecombinationofsoil/groundwaterchemistrymonitoring andopportunisticinspectionsofbelowgradeconcretecanverifythatperiodicinspectionsofaccessible abovegradestructurescanserveasaleadingindicatorofdegradation.

Withoutopportunisticinspectionsofbelowgradeconcrete,itisuncleartothestaffthattheperiodic AMPinspectionsofaccessibleconcretecanbealeadingindicatorofbelowgradeconditions.

Thisinformationisneededtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

InaccordancewiththeguidancegiveninNUREG2214andACI349.3R02,100UConcreteAMPofthe renewalapplicationhasbeenupdatedtoincludeinspectionoftheinaccessibleareasofthepadandcask.

RAID1:UpdatetheproposedFSARsupplementinAppendixDoftherenewalapplicationtoincludethe followinginformation:

1.ProvideasummaryoftheTLAAsforNeutronAbsorberDepletionandMPCFatigue.Therenewal applicationindicatesthatrepeatedliftingoftheMPCmayloweritsfatiguelifeandthatananalysis wasperformedtodeterminetheallowablenumberofliftingcyclesoftheMPCoverthe60year renewalperiod.Inaddition,therenewalapplicationindicatesthattheoriginalanalysisforboron depletionwasreperformedtosupportthe60yearrenewalperiod.Theseassessmentsarenot adequatelyreflectedintheproposedFSARsupplementinAppendixDoftherenewalapplication.

2.ProvideclearreferencestosectionsoftherenewalapplicationthatarementionedintheAMP summariesintheproposedTables9.A.11through9.A.15oftheFSARsupplement.TheAMP summariescontainreferencestotherenewalapplicationthatarenotincludedintheproposed FSARsupplement.Forexample,Table9.A.11(MPCAMP),Element1(ScopeofProgram)notes, ThisprogramcoversMPCsstoredundertheHISTORM100CoC,andthesubcomponents identifiedinTable3.31.However,Table3.31oftherenewalapplication(AgingManagement ReviewofMPCEnclosureVesselSubcomponents)isnotincludedintheFSARsupplement.

Therefore,theapplicantshouldeitherincludeTable3.31oftherenewalapplicationintheFSAR supplementorincludeaclearreferencetotherenewalapplicationTable3.31intheFSAR supplement.

3.ProvideacleartimeframeforimplementationofAMPsprovidedinTable9.A.11(MPCAMP)and Table9.A.12(OverpackAMP).Forexample,Table9A.11(MPCAMP),Element4(Detectionof AgingEffects)notesthatthefirstinspectionshouldoccurwithin365daysofthe20thanniversary ofinitialoverpackloadingatthesiteorwithin365daysoftheissuanceoftherenewedlicense, whicheverislater(emphasisadded).Sinceofcanindicateatimebeforeoraftertheoccurrence (oftheanniversaryofloadingorissuanceoftherenewal),thetimeframeforimplementationis notclear.TheAMPsummariesintheFSARshouldbeclearintermsofthetimebeforeorafterthe occurrenceforimplementationbythegenerallicensees.

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AppendixDoftherenewalapplicationprovidesproposedFSARchangepages(FSARsupplement)to documenttheagingmanagementinformationassociatedwiththeCoCrenewal,per10CFR72.240(c).

TheCoCrenewalwillincludeaconditionfortheCoCholdertoupdatetheFSARtoreflectthechanges andcommitmentsresultingfromthereviewandapprovaloftheCoCrenewal.TheFSARmustclearly reflecttheapproveddesignbases,includingagingmanagementinformationintheperiodofextended operationiftherenewalisapproved.Therefore,theFSARsupplementinAppendixDoftherenewal applicationmustincludeallFSARchangesrelatedtotherenewaloftheCoC.

Thisinformationisrequiredtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

1) InformationregardingtheTLAAshasbeenaddedtotheFSARAppendix9.A,andishighlighted forthestaffsconvenience.
2) ClearreferencestotherenewalapplicationhavebeenaddedthroughouttheFSARAppendix 9.A,andhighlightedforthestaffsconvenience
3) Thewordingwaschosentoprovideanacceptablelevelofflexibilitytothegenerallicensees.Ifa siteperformsaninspectioninaccordancewiththeAMPsshortlybeforetheiranniversaryof loading,thisinspectionshouldstillbeacceptableformeetingtheAMPrequirement.For planningpurposes,thesitemaychoosetodotheinspectioneitherbeforeoraftertheexact dateoftheanniversary,anditisbelievedthatthereisnotechnicalreasonthateitherbeforeor afterismoreappropriate.Forthosegenerallicenseeswhowillbeintimelyrenewalandwillbe pasttheanniversaryoftheirfirstloading,theAMPinspectionwillneedtooccurwithin365days afterissuanceoftheCoC,sothishasbeenupdated.

RAIE1:RevisetheproposedCoCcondition#13andtheproposedTS5.8/5.4inAppendixEofthe renewalapplicationtoincludeacleartimeframeforimplementationbytheCoCholderandgeneral licensees.Inaddition,considerrevisingtheproposedTS5.8/5.4toincludeareferencetothewritten evaluationsrequiredby10CFR72.212(b).

AppendixEoftherenewalapplicationincludesproposedCoCcondition#13fortheCoCholderto submitanupdatedFSARwithin90daysoftheeffectivedateoftherenewal(emphasisadded).

AppendixEoftherenewalapplicationalsoincludesproposedTS5.8/5.4,AgingManagementProgram forgenerallicenseestoestablishproceduresforAMPimplementationwithin365daysoftheeffective dateoftherenewaloftheCoCor365daysofthe20thanniversaryoftheloadingofthefirstdrystorage systematitssite,whicheverislater(emphasisadded).Sinceofcanindicateatimebeforeorafterthe occurrence(oftheeffectivedateoftherenewalortheanniversaryofloading),thetimeframefor implementationisnotclear.TheconditionsandTSshouldbeclearintermsofthetimebeforeorafter theoccurrenceforimplementationbytheCoCholderandgenerallicensees.Forexample,within90 daysaftertheeffectivedateoftherenewaloftheCoC.

Additionally,AppendixEoftherenewalapplicationincludesproposedCoCcondition#14forgeneral licenseestoincludeintheirwrittenevaluationsrequiredby§72.212(b),thenewCoCterms,conditions, andspecificationsresultingfromtheCoCrenewal(e.g.,AMPs).Theregulationsin§72.212(b)require,in part,thatthewrittenevaluationsbeperformedbeforeuseandbeforeapplyingthechangesauthorized byanamendedCoC.Also,thespecificregulationin10CFR72.212(b)(11)requiresgenerallicenseesto

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complywiththeCoC,includingwherethelicenseehasappliedthechangesofanamendedCoC,which includestherequirementsofAMPsputintoeffectasconditionsofarenewedCoC.Therefore,pursuant totheregulationsin§72.212(b),generallicenseesarerequiredtoperformwrittenevaluationsbefore implementingtheAMPsinarenewedCoC.Thus,theproposedcondition#14maynotbenecessaryto includeintherenewedCoC.

Furthermore,regardingtimingofthe§72.212(b)writtenevaluationsandthedevelopmentofAMP implementingprocedures,previousexperiencehasshownthatagenerallicenseewouldlikelyreviseits

§72.212(b)evaluationreportconcurrentwithitsdevelopmentoftheAMPimplementingprocedures.

Therefore,asstatedabove,considerrevisingtheproposedTS5.8/5.4toincludeareferencetothe§ 72.212(b)writtenevaluationstoclarifyforagenerallicenseethatimplementationandtimingforthe proposedTS5.8/5.4alsoincludestherequirementsin§72.212(b).

Thisinformationisrequiredtodemonstratecompliancewith10CFR72.240(c).

HoltecResponse:

SimilartoRAID1,thestatementsforgenerallicenseestoestablishprocedureswithin365daysofthe anniversarywereintentionallychosentogiveflexibilitytotheusers.Ifasiteweretoestablish proceduresbeforeactuallycrossingtheir20thanniversarydate,thatshouldbeacceptableunderthe CoC.FortheconformingFSARchangesandforsitesthathavealreadycrossedthe20thanniversary, theseimplementationswillonlytakeplaceaftertheissuanceoftherenewedCoC,sothoselocations havebeenmodified,andarehighlightedforstaffsreview.

Regardingthe72.212writtenevaluations,Holtecsunderstandingisthattherequirementsofcondition 14andTS5.4/5.8arefortwodifferentstepsintheprocess.TheCondition14requirementsarefor simplecompliancewiththerenewedCoC.WhentheNRCissuestherenewedCoC,alluserswillhaveto updatethe72.212reporttoensuretheyarereferencingtherenewedCoC,whichsupersedesthe existingapprovedCoC,regardlessofwhenthatsystemwasloaded.Ifthisstepisnotperformed,the sitemaybeoutofcompliancewith72.214.TherequirementinTS5.4/5.8wasintendedtocoverthe actualdevelopmentofproceduresandevaluationsoftheagingmanagementprogram,whichneedto beimplementedbeforethesiteenterstheperiodofextendedstorage,butnotnecessarilyatthesame timethattherenewedlicenseisissued.Itisbelievedthatbothstepsarenecessarytoensuregeneral licenseecompliancethroughoutthevariousscenarioswhichmayapply.

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