RG1.052 气体过滤和吸收单元的设计检查与试验准则 2001

RegulatoryguidesareissuedtodescribeandmakeavailabletothepublicsuchinformationasmethodsacceptabletotheNRCstaffforimplementingspecificpartsoftheNRC’sregulations,techniquesusedbythestaffinevaluatingspecificproblemsorpostulatedaccidents,anddataneededbytheNRCstaffinitsreviewofapplicationsforpermitsandlicenses.Regulatoryguidesarenotsubstitutesforregulations,andcompliancewiththemisnotrequired.MethodsandsolutionsdifferentfromthosesetoutintheguideswillbeacceptableiftheyprovideabasisforthefindingsrequisitetotheissuanceorcontinuanceofapermitorlicensebytheCommission.Thisguidewasissuedafterconsiderationofcommentsreceivedfromthepublic.Commentsandsuggestionsforimprovementsintheseguidesareencouragedatalltimes,andguideswillberevised,asappropriate,toaccommodatecommentsandtoreflectnewinformationorexperience.WrittencommentsmaybesubmittedtotheRulesandDirectivesBranch,ADM,U.S.NuclearRegulatoryCommission,Washington,DC20555-0001.Regulatoryguidesareissuedintenbroaddivisions:1,PowerReactors;2,ResearchandTestReactors;3,FuelsandMaterialsFacilities;4,EnvironmentalandSiting;5,MaterialsandPlantProtection;6,Products;7,Transportation;8,OccupationalHealth;9,AntitrustandFinancialReview;and10,General.Singlecopiesofregulatoryguides(whichmaybereproduced)maybeobtainedfreeofchargebywritingtheDistributionServicesSection,U.S.NuclearRegulatoryCommission,Washington,DC20555-0001,orbyfaxto(301)415-2289,[e-mail]ideareavailableontheinternetatNRC’shomepageat(DraftwasissuedasDG-1102)DESIGN,INSPECTION,ANDTESTINGCRITERIAFORAIRFILTRATIONANDADSORPTIONUNITSOFPOST-ACCIDENTENGINEERED-SAFETY-FEATUREATMOSPHERECLEANUPSYSTEMSINLIGHT-WATER-COOLEDNUCLEARPOWERPLANTSA.INTRODUCTIONThisguideprovidesguidanceandcriteriaacceptabletotheNRCstaffforimplementingtheNRC’sregulationsinAppendixAto10CFRPart50withregardtothedesign,inspection,andtestingofairfiltrationandiodineadsorptionunitsofengineered-safety-feature(ESF)atmospherecleanupsystemsinlight-water-coolednuclearpowerplants.Forthepurposesofthisguide,ESFatmospherecleanupsystemsarethosesystemsthatarecreditedinthelicensee’scurrentdesignbasisaccidentanalysis,asdescribedintheSafetyAnalysisReport(SAR).ThisguideaddressesESFatmospherecleanupsystems,includingthevariouscomponentsandductwork,inthepostulateddesignbasisaccident(DBA)environment.InAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,“DomesticLicensingofProductionandUtilizationFacilities,”GeneralDesignCriteria41,42,and43requirethatcontainmentatmospherecleanupsystemsbeprovidedasnecessarytoreducetheamountofradioactivematerialreleasedtotheenvironmentfollowingapostulatedDBA.Theyalsorequirethatthese1.52-2systemsbedesignedtopermitappropriateperiodicinspectionandtestingtoensuretheirintegrity,capability,andoperability.GeneralDesignCriterion61ofAppendixAto10CFRPart50requiresthatfuelstorageandhandlingsystems,radioactivewastesystems,andothersystemsthatmaycontainradioactivitybedesignedtoensureadequatesafetyundernormalandpostulatedaccidentconditionsandthattheybedesignedwithappropriatecontainment,confinement,andfilteringsystems.GeneralDesignCriterion19requiresthatadequateradiationprotectionbeprovidedtopermitaccesstoandoccupancyofthecontrolroomunderaccidentconditionsandforthedurationoftheaccidentwithoutpersonnelradiationexposuresinexcessof5remtothewholebody,oritsequivalenttoanypartofthebody.Nuclearpowerplantsarerequiredby10CFRPart100,“ReactorSiteCriteria,”tobesitedsothatradiologicaldosesfromnormalandpostulatedaccidentsarekeptacceptablylow.Afootnoteto10CFR100.11statesthatthefissionproductreleaseassumedintheplantdesignshouldbebasedonamajoraccidentinvolvingsubstantialcoredamagewithsubsequentreleaseofappreciablequantitiesoffissionproducts.Accordingto10CFR50.67,anapplicationtorevisealicensee’scurrentaccidentsourcetermmustcontainanevaluationoftheconsequencesofapplicabledesignbasisaccidentspreviouslyanalyzedintheSafetyAnalysisReport.Thisguidedoesnotapplytoatmospherecleanupsystemsdesignedtocollectairborneradioactivematerialsduringnormalplantoperation,includinganticipatedoperationaloccurrences.RegulatoryGuide1.140,Design,Inspection,andTestingCriteriaforAirFiltrationandAdsorptionUnitsofNormalAtmosphereCleanupSystemsinLight-Water-CooledNuclearPowerPlants,providesguidanceforthesesystems.Theguidanceandcriteriapresentedinthisguidearenotmandatoryandlicenseesmaychoosenottochangetheirlicensingbasis.MethodsandsolutionsdifferentfromthosesetoutinthisguidewillbeacceptablewhenanapplicantorlicenseeproposesanacceptablealternativemethodforcomplyingwiththespecifiedportionsoftheNRC’sregulations.Theinformationcollectionscontainedinthisregulatoryguidearecoveredbytherequirementsof10CFRPart50,whichwereapprovedbytheOfficeofManagementandBudget,approvalnumber3150-3011.Ifameansusedto