RG1.195 设计基准事故放射性后果评价方法与假设 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-1113)METHODSANDASSUMPTIONSFOREVALUATINGRADIOLOGICALCONSEQUENCESOFDESIGNBASISACCIDENTSATLIGHT-WATERNUCLEARPOWERREACTORSNRCDOCUMENTSRequestsforsinglecopiesofdraftoractiveregulatoryguides(whichmaybereproduced)orforplacementonanautomaticdistributionlistforsinglecopiesoffuturedraftguidesinspecificdivisionsshouldbemadeinwritingtotheU.S.NuclearRegulatoryCommission,Washington,DC20555,Attention:ReproductionandDistributionServicesSection,orbyfaxto(301)415-2289;[e-mail]pectionorcopyingforafeefromtheNRCPublicDocumentRoomat11555RockvillePike(firstfloor),Rockville,MD;thePDR’smailingaddressisUSNRCPDR,Washington,DC20555;telephone[phone]or1-[phone];fax[phone];[e-mail],P.O.Box37082,Washington,DC20402-9328(telephone[phone]);orfromtheNationalTechnicalInformationServicebywritingNTISat5285PortRoyalRoad,Springfield,VA22161;[phone].CopiesareavailableforinspectionorcopyingforafeefromtheNRCPublicDocumentRoomat11555RockvillePike,Rockville,MD;thePDR’smailingaddressisUSNRCPDR,Washington,DC20555;telephone[phone]or(800)397-4209;fax[phone];[e-mail]rimprovementsinregulatoryguidesareencouragedatalltimes,andguideswillberevised,asappropriate,toaccommodatecommentsandtoreflectnewinformationorexperience.CommentsmaybemailedtotheRulesandDirectivesBranch,OfficeofAdministration,U.S.NuclearRegulatoryCommission,Washington,DC20555-0001.Youmaye-mailcommentsto:[e-mail]viatheNRC’srulemakingwebsiteat(301)415-5905;[e-mail]lesandDirectivesBranchat(301)415-5144.PubliclyavailabledocumentsrelatedtothisregulatoryguidemaybeexaminedandcopiedforafeeattheNRC'sPublicDocumentRoom(PDR),PublicFileAreaO1F21,11555RockvillePike,Rockville,Maryland.Theregulatoryguideandrelateddocuments,includingcomments,canbeviewedanddownloadedelectronicallyviatheNRC’srulemakingwebsiteat’sElectronicReadingRoomat(ADAMS),whichprovidestextandimagefilesofNRC'spublicdocuments.IfyoudonothaveaccesstoADAMSorifthereareproblemsinaccessingthedocumentslocatedinADAMS,contacttheNRCPublicDocumentRoom(PDR)Referencestaffat1-800-397-4209,[e-mail]..........................................................1B.DISCUSSION.............................................................2C.REGULATORYPOSITION..................................................31.GENERICCONSIDERATIONS...........................................31.1SafetyMargins....................................................31.2DefenseinDepth..................................................41.3ScopeofRequiredAnalyses.........................................41.4RiskImplications..................................................61.5SubmittalRequirements.............................................61.6FinalSafetyAnaly