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,orbyemailtoDISTRIBUTION@NRC.GOV.ElectroniccopiesofthisguideandotherrecentlyissuedguidesareavailableontheinternetatNRC’shomepageat’shomepage,AccessionNumberML013100305.U.S.NUCLEARREGULATORYCOMMISSIONRevision2November2001REGULATORYGUIDEOFFICEOFNUCLEARREGULATORYRESEARCHREGULATORYGUIDE1.143(DraftwasissuedasDG-1100)DESIGNGUIDANCEFORRADIOACTIVEWASTEMANAGEMENTSYSTEMS,STRUCTURES,ANDCOMPONENTSINSTALLEDINLIGHT-WATER-COOLEDNUCLEARPOWERPLANTSA.INTRODUCTIONThisregulatoryguidehasbeenrevisedtoprovideguidancetolicenseesandapplicantsonmethodsacceptabletothestaffforcomplyingwiththeNRC'sregulationsinthedesign,construction,installation,andtestingthestructures,systems,andcomponentsofradioactivewastemanagementfacilitiesinlight-water-reactornuclearpowerplants.In10CFRPart50,DomesticLicensingofProductionandUtilizationFacilities,§50.34,ContentsofApplications;TechnicalInformation,requiresthateachapplicationforaconstructionpermitincludeapreliminarysafetyanalysisreport.Partoftheinformationrequiredisrelatedtoqualityassuranceandthepreliminarydesignofthefacility,including,amongotherthings,theprincipaldesigncriteriaforthefacility.AppendixB,QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,to10CFRPart50establishesoverallqualityassurancerequirementsforstructures,systems,andcomponentsimportanttosafety.AppendixA,''GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50establishesminimumrequirementsfortheprincipaldesigncriteriaforlight-water-coolednuclearpowerplants.Criterion1,QualityStandardsandRecords,''ofAppendixArequiresthatstructures,systems,andcomponentsimportanttosafetybedesigned,fabricated,erected,andtestedtoqualitystandardscommensuratewiththeimportancetosafetyofthesafetyfunctiontobeperformedandthataquality1Adamsetal,Re-evaluationofRegulatoryGuidanceProvidedinRegulatoryGuides1.142and1.142,”NUREG/CR-5733,August1999.CopiesareavailableatcurrentratesfromtheU.S.GovernmentPrintingOffice,P.O.Box37082,Washington,DC20402-9328(telephone(202)512-1800);orfromtheNationalTechnicalInformationServicebywritingNTISat5285PortRoyalRoad,Springfield,VA22161;(telephone(703)487-4650;’smailingaddressisUSNRCPDR,Washington,DC20555;telephone(301)415-4737or(800)397-4209;fax(301)415-3548;emailisPDR@NRC.GOV.1.143-2assuranceprogrambeestablishedandimplementedinordertoprovideadequateassurancethatthesestructures,systems,andcomponentswillsatisfactorilyperformtheirsafetyfunction.Criterion2,DesignBasesforProtectionAgainstNaturalPhenomena,ofAppendixArequires,amongotherthings,thatstructures,systems,andcomponentsimportanttosafetybedesignedtowithstandtheeffectsofnaturalphenomenasuchasearthquakes,tornados,orfloodingwithoutlossofcapabilitytoperformtheirsafetyfunctions.Thedesignbasesforthesestructures,systems,andcomponentsaretoreflecttheimportanceofthesafetyfunctionstobeperformed.AppendixS,“EarthquakeEngineeringCriteriaforNuclearPowerPlants,”of10CFRPart50statesgeneraldesignrequirementsfortheimplementationofGeneralDesignCriterion2.Criterion60,ControlofReleasesofRadioactiveMaterialstotheEnvironment,''ofAppendixArequiresthatthenuclearpowerunitdesignincludemeanstosuitablycontrolthereleaseofradioactivematerialsingaseousandliquideffluentsandtohandleradioactivesolidwasteproducedduringnormalreactoroperation,includinganticipatedoperationaloccurrences.Thereleaseofradioactivematerialsfromexternalman-inducedeventsanddesignbasisaccidentsmustalsobecontrolled.Thisregulator