RG1.069 核电厂混凝土辐射屏蔽 1973

Section20.101,ExposureofIndividualstoRadiationinRestrictedAreas,of10CFRPart20,StandardsforProtectionAgainstRadiation,statesthat,subjecttocertainspecificexceptionscontainedinthatsection,nolicenseeshallpossess,use,ortransferlicensedmaterialinsuchamannerastocauseanyindividualinarestrictedAreatoreceiveadoseInexcessofthelimitsspecifiedtherein.Paragraph(c)of§20.1providesthatlicensees,inadditiontocomplyingwiththerequirementssetforthinPart20,shouldmakeeveryreasonableeffort.tomaltainradiationexposuresasfarbelowthelimitsspecifiedinthatpartaspracticable.GeneralDesignCriterion1,QualityStandardsandRecords,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPartSO,LicensingofProductionandUtilizationFacilities,requiresthatstructures,systems,andcomponentsimportanttosafetybedesigned,fabricated,erected,andtestedtoqualitystandardscommensuratewiththeimportanceofthesafetyfunctiontobeperformed.AppendixB,QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,to10CFRPart50requiresthatmeasuresbeestablishedtoassuredesigncontrol,materialcontrol,specialprocesscontrol,andinspectionandtestcontrols.AppendixBalsorequiresthatactivitiesaffectingqualitybeaccomplishedundersuitablycontrolledconditions.ThisguidedescribessomebasesacceptabletotheRegulatorystaffforimplementingtheaboverequIrementswithregardtothedesignandconstructionofconcreteradiationshieldsinnuclearpowerplants.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.B.DISCUSSIONSubcommitteeANS-11,RadioactiveMateriahHandlingFacilitiesandSpecializedEquipment,oftheDecember1973IDEAmericanNuclearSocietyhasdevelopedastandardpresentingrequirementsandrecommendedpracticesfortheconstructionofconcreteradiationshieldingstructuresandforcertainelementsofdesignthatrelatetoproblemsuniquetothistypeofstructure.ThisstandardwasapprovedbytheAmericanNationalStandardsCommitteeNIO0,AtomicIndustryFacilityDesign,Construction,andOperationCriteria,andwassubsequentlyapprovedbytheAmericanNationalStandardsInstitute(ANSI)onDecember22,1972anddesignatedANSINI01.6-1972.Thestandarddiscussesaggregates,designofconcretemixturesandforms,placementofconcrete,designandinstallationofpenetrations,embedments,metalliners,andpenetrationplugsandalsooutlinestestingandqualityassuranceprovisionsneededtoverifythatthedesiredqualityofdesignandconstructionhasbeenachieved.Thestandarddoesnotincludedetailedtreatmentsofstructuraldesignordeterminationofshieldthickness,butdoesreferenceotherstandardscoveringstructuraldesign.C.REGULATORYPOSITIONTherequirementsandrecommendedpracticescontainedinANSINI01.6-1972,ConcreteRadiationShields,'havegenerallybeenendorsedbyRegulatoryGuide3.9asacceptablefortheconstructionofradiationshieldingstructuresforhotlaboratories,radiochemicalplants,experimentalfacilities,andnuclearfuelfabricationplants.Althoughwrittenprimarilyforthesefacilities,therequirementsandrecommendedpracticesarealsoconsideredtobeapplicabletoshieldingstructuresfornuclearpowerplantssubjecttothefollowing:'CopiesmaybeobtainedfromAmercianNuclearSociety,244EastOgdenAvenue,Hinsdale,Minois60521.USAECREGULATORYGUIDESCpofWshedguidesmaybeobtainedbyrequestIndlmtingthedivisiondesiredtotheUS.AtomicEnergyCommission.Washington.D.C.20545.egultatoryGuidesamIsuedtodescribeandWakeavalabletOthePublicAttention:DirectorofRegulatoryStandmrde.CommentsendKugestionsforenothodaccptabletotheAECRegulatoryetaffofidiPleentningspecfIfcParisOflrnpXovernantsInthesekamencouragedandshouldbeaenttotheSecretarygoCornuWMsiOnsregulations.todelinet,tihniQuemedbythesaffinoftheDoenrnon.US.AtomicEnergyCoinmion.whington.D.C.20545.Nyeltuelingspcificproblasmnwpoetubtadaccidsnt,,ortoProvideguidancetoAttention-Chief.PublicPromedngsBuff.appllmnts.RegultoryGuidkamnotsubrtitutesfornreulationsandowonlahnmwith9hembnotreluired.Metw&odhendiolutionsdfferentfromthoat&utInTheguiehsambIsuedinthefolloingtenbroeddivisions:Uhegu=willbeecuttabieifthyprovideaheelsforthefindlngsequislte1oU.sueneeorconsinuanorolpermltorlicensbytheCommission.1.PoserRctorsS.Products2.ReesearchendTestReectors7.Transportation3.FlsndMaterialsFacilitiesa.OccultionltHealthPublishedguidswillbetevisedperlodially.asepproprie.tomomnmodt4.EsIronwmtalandSiting9.AntitrustRlviwmeomsnendwsmfelctminformationorexperence.LatrIelandPlantProtection10.GeneralU.S.ATOMICENERGYCOMMISSION,)REGULATORYGUDIRECTORATEOF.REGULATORYSTANDARDSREGULATORYGUIDE1.69CONCRETERADIATIONSHIELDSFORNUCLEARPOWERPLANTSA.INTRODUCTION1.Section2ofANSINIO.6-1972listsapplicabledocumentswhichareintendedtosupplementthestandaid.Thesedocuments,appropriatelyappliedbytheuser,doprovideusefulsupplementaryguidance.However,thisendorsementofANSIN101.6-1972doesnotconstituteablanketendorsementofthecontentsofthedocumentsreferencedbythestandard.2.Section4.2ofANSIN101.6-1972statesthewhenthedocumentsreferencedinSection2differfromprojectdrawingsandspecifications,theprojectdocumentsshallgovern.Thisisacceptableprovidedtheresultingmarginofsafetyisnotreducedbelowthatintendedbyregulatoryrequirementsorcomrhitmentsmadetoreg