RG1.013 乏燃料贮存设施设计基准 2007

TheU.S.NuclearRegulatoryCommission(NRC)issuesregulatoryguidestodescribeandmakeavailabletothepublicmethodsthattheNRCstaffconsidersacceptableforuseinimplementingspecificpartsoftheagency’sregulations,techniquesthatthestaffusesinevaluatingspecificproblemsorpostulatedaccidents,anddatathatthestaffneedinreviewingapplicationsforpermitsandlicenses.Regulatoryguidesarenotsubstitutesforregulations,andcompliancewiththemisnotrequired.MethodsandsolutionsthatdifferfromthosesetforthinregulatoryguideswillbedeemedacceptableiftheyprovideabasisforthefindingsrequiredfortheissuanceorcontinuanceofapermitorlicensebytheCommission.Thisguidewasissuedafterconsiderationofcommentsreceivedfromthepublic.TheNRCstaffencouragesandwelcomescommentsandsuggestionsinconnectionwithimprovementstopublishedregulatoryguides,aswellasitemsforinclusioninregulatoryguidesthatarecurrentlybeingdeveloped.TheNRCstaffwillreviseexistingguides,asappropriate,toaccommodatecommentsandtoreflectnewinformationorexperience.WrittencommentsmaybesubmittedtotheRulesandDirectivesBranch,OfficeofAdministration,U.S.NuclearRegulatoryCommission,Washington,DC20555-0001.Regulatoryguidesareissuedin10broaddivisions:1,PowerReactors;2,ResearchandTestReactors;3,FuelsandMaterialsFacilities;4,EnvironmentalandSiting;5,MaterialsandPlantProtection;6,Products;7,Transportation;8,OccupationalHealth;9,AntitrustandFinancialReview;and10,General.Requestsforsinglecopiesofdraftoractiveregulatoryguides(whichmaybereproduced)shouldbemadetotheU.S.NuclearRegulatoryCommission,Washington,DC20555,Attention:ReproductionandDistributionServicesSection,orbyfaxto(301)415-2289;[e-mail]ideandotherrecentlyissuedguidesareavailablethroughtheNRC’spublicWebsiteundertheRegulatoryGuidesdocumentcollectionoftheNRC’sElectronicReadingRoomat’sAgencywideDocumentsAccessandManagementSystem(ADAMS)at(DraftwasissuedasDG-1162,datedOctober2006)SPENTFUELSTORAGEFACILITYDESIGNBASISA.INTRODUCTIONTheU.S.NuclearRegulatoryCommission(NRC)isissuingthisregulatoryguidetoprovidecurrentguidanceregardingthedesignbasisforspentfuelstoragefacilities.Thisregulatoryguideendorses(withcertainadditions,clarifications,andexceptions)“DesignObjectivesforLight-WaterSpentFuelStorageFacilitiesatNuclearPowerPlants,”whichtheAmericanNationalStandardsInstitute/AmericanNuclearSocietyissuedasANSIStandardN210-1976/ANS-57.2-1983(Ref.1).GeneralDesignCriterion(GDC)61,“FuelStorageandHandlingandRadioactivityControl,”setforthinAppendixA,“GeneralDesignCriteriaforNuclearPowerPlants,”toTitle10,Part50,oftheCodeofFederalRegulations(10CFRPart50),“DomesticLicensingofProductionandUtilizationFacilities”(Ref.2),requiresthatfuelstorageandhandlingsystemsbedesignedtoensureadequatesafetyunderanticipatedoperatingandaccidentconditions.Specifically,GDC61requires(1)periodicinspections;(2)suitableradiationshielding;(3)appropriatecontainment,confinement,andfilteringsystems;(4)residualheatremovalcapabilityconsistentwithitsimportancetosafety;and(5)preventionofsignificantreductioninfuelstorageinventoryunderaccidentconditions.Toaugmentthoserequirements,thespentfuelpooldesignbasisisalsocoveredbyGDC2,“DesignBasesforProtectionAgainstNaturalPhenomena”;GDC4,“EnvironmentalandDynamicEffectsDesignBases”;andGDC63,“MonitoringFuelandWasteStorage.”Inaddition,RegulatoryGuide1.26,“QualityGroupClassificationsandStandardsforWater-,Steam-,andRadioactive-Waste-ContainingComponentsofNuclearPowerPlants”(Ref.3),andRegulatoryGuide1.29,“SeismicDesignClassification”(Ref.4),respectively,detailthequalitygroupsandseismiccategories,whicharereferencedinthisguide.Rev.2ofRG1.13,Page2Thisregulatoryguidecontainsinformationcollectionsthatarecoveredbytherequirementsof10CFRPart50whichtheOfficeofManagementandBudget(OMB)approvedunderOMBcontrolnumber3150-0011.TheNRCmayneitherconductnorsponsor,andapersonisnotrequiredtorespondto,aninformationcollectionrequestorrequirementunlesstherequestingdocumentdisplaysacurrentlyvalidOMBcontrolnumber.B.DISCUSSIONBackgroundThisrevisionofRegulatoryGuide1.13addressesguidelinesforconformancewiththeGDCsthatarerelevanttothedesignofspentfuelstoragefacilities.SincetheNRCissuedRevision1oftheguidein1975,thestaffhasaddedconsiderationsregardinginspections,radiationshieldingbyadequatewaterlevels,coolantcleanupsystems,andresidualheatremovalcapability,includingprovisionsforadequatenaturalcirculationthroughthestorageracks.Inaddition,thisguideaddressestheimpactofhigh-burnupfuel,updatedearthquakeengineeringcriteria,andupdatedlimitsonpotentialoffsiteexposure.Itisimportantthatthespentfuelstoragepoolstructures,systems,andcomponentsbedesignedtoaccomplishthefollowing:•preventlossofwaterfromthefuelpoolthatwouldleadtowaterlevelsthatareinadequateforcoolingorshielding•protectthefuelfrommechanicaldamage•providethecapabilitytolimitpotentialo