RG1.194 控制室大气相关浓集物 2003

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]ideandotherrecentlyissuedguidesareavailableatNRC’shomepageat(DraftguidewasissuedasDG-1111)ATMOSPHERICRELATIVECONCENTRATIONSFORCONTROLROOMRADIOLOGICALHABITABILITYASSESSMENTSATNUCLEARPOWERPLANTSTABLEOFCONTENTSA.INTRODUCTION.......................................................1B.DISCUSSION.........................................................2C.REGULATORYPOSITION...............................................31.DEFINITIONS.........................................................32.GENERALCONSIDERATIONS...........................................43.CALCULATIONOFχ/QUSINGARCON96.................................53.1MeteorologicalDataInput...........................................53.2DeterminationofReleasePoint(Source)Characteristics...................63.3DeterminationofControlRoomIntakes(Receptors).....................113.4DeterminationofSource-ReceptorDistancesandDirections...............144.ALTERNATIVEPROCEDURESFORGROUNDLEVELRELEASES...........154.1PointSource-PointReceptor........................................154.2DiffuseSource-PointReceptor......................................154.3PointorDiffuseSourcewithTwoAlternativeReceptors..................164.4Determinationofχ/QValuesforOtherTimeIntervals....................165.INSTANTANEOUSPUFFRELEASES.....................................186.PLUMERISE........................................................207.USEOFSITE-SPECIFICEXPERIMENTALDATA...........................22D.IMPLEMENTATION...................................................22REFERENCESAPPENDICESA.ARCON96METEOROLOGICALDATASETSTRUCTURE...................311ThisguidewillbeusefultoapplicantsforconstructionpermitsoroperatinglicensesunderPart50;applicantsfordesigncertificationsunderPart52,“EarlySitePermits;StandardDesignCertifications;andCombinedLicensesforNuclearPowerPlants”;andapplicantsforcombinedlicensesunderPart52whodonotreferenceastandarddesigncertification.SeetheImplementationsectionofthisguide.1.194-1A.INTRODUCTIONThisguideprovidesguidanceondeterminingatmosphericrelativeconcentration(/Q)valuesinsupportofdesignbasiscontrolroomradiologicalhabitabilityassessmentsatnuclearpowerplants.ThisguidedescribesmethodsacceptabletotheNRCstafffordetermining/Qvaluesthatwillbeusedincontrolroomradiologicalhabitabilityassessmentsperformedinsupportofapplicationsforlicenses1andlicenseamendmentrequests.In10CFRPart50,“DomesticLicensingofProductionandUtilizationFacilities,”Section50.34,“ContentsofApplications;TechnicalInformation,requiresthateachapplicantforaconstructionpermitoroperatinglicenseprovideananalysisandevaluationofthedesignandperformanceofstructures,systems,andcomponentsofthefacilitywiththeobjectiveofassessingtherisktopublichealthandsafetyresultingfromtheoperationofthefacility.AppendixA,“GeneralDesignCriteriaforNuclearPowerPlants,”to10CFRPart50establishesminimumrequirementsfortheprincipaldesigncriteriaforwater-coolednuclearpowerplants.GeneralDesignCriterion19(GDC-19),“ControlRoom,”ofAppendixAestablishesminimumrequirementsforthefacilitycontrolroom.Includedistherequirementthatadequateradiationprotectionbeprovidedtopermitaccessandoccupancyofthecontrolroomforthedurationofaccidentconditions.Similarcriteriaareprovidedin10CFRPart50.67(b)(2)(iii)forplantsthatusealternativesourceterms.Atmosphericrelativeconcentrationsaresignificantinputsinassessmentsperformedtodemonstratecompliancewiththeseregulations.Manyoftheregulatorypositionspresen