RG1.148 安全重要系统中能动阀门组件的功能规格书 1981

U.S.NUCLEARREGULATORYCOMMISSIONivarcni198,,REGULATORYGUIDEOFFICEOFSTANDARDSDEVELOPMENTREGULATORYGUIDE1.148(TaskSC704-5)FUNCTIONALSPECIFICATIONFORACTIVEVALVEASSEMBLIESINSYSTEMSIMPORTANTTOSAFETYINNUCLEARPOWERPLANTSA.INTRODUCTIONCriterion1,QualityStandardsandRecords,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,DomesticLicensingofProductionandUtilizationFacilities,requires,inpart,thatcomponentsimportanttosafetybedesigned,fabricated,erected,andtestedtoqualitystandardscommensuratewiththeimportanceofthesafetyfunctionstobeperformed.SectionIII,DesignControl,ofAppendixB,QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,to10CFRPart50requires,inpart,thatmeasuresbeestablishedtoensurethatregulatoryrequirementsandthedesignbasisforapplicablestructures,systems,andcomponentsarecorrectlytranslatedintospecifications,drawings,procedures,andinstructions.ThisguidedelineatesaprocedureacceptabletotheNRCstaffforimplementingtheCommission'sregulationswithrespecttothedetailedspecificationofinformationpertinenttodefiningoperatingrequirementsforvalveassemblieswhosesafety-relatedfunctionistoopen,close,orregulatefluidflowinlight-water-coolednuclearpowerplants.Thisguidewillbeappliedtoactivevalveassembliesinsystemsimportanttosafetyinlight-water-coolednuclearpowerplants.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.B.DISCUSSIONTherulesforconstructionofnuclearcomponentsgiveninSectionIII,NuclearPowerPlantComponents,oftheASMEBoilerandPressureVesselCode2(theCode)donot,asindicatedinNCA-2142(b)ofthe1977Edition,IAsidentifiedinaccordancewithSection3.9.3.2ofRegulatoryGuide1.70,Revision3,StandardFormatandContentofSafetyAnalysisReportsforNuclearPowerPlants.2CopiesmaybeobtainedfromtheAmericanSocietyofMechanicalEngineersUnitedEngineeringCenter,345East47thStreet,NewYork,N.Y.10017.ensureoperabilityofcomponentsinwhichmechanicalmotionisrequired.Sincevalveassembly3operabilityisnecessarytoensureperformanceofsomesystemsimportanttosafetyinnuclearpowerplants,theAmericanNationalStandardsInstitute(ANSI)establishedagrouptoprovidedirectionfordevelopmentofthenecessarystandardsthatwouldprovideassuranceoftheoperabilityofvalveassemblies.ThefirststandardpublishedasaresultofthateffortwasANSIN278.1-1975,Self-OperatedandPower-OperatedSafety-RelatedValvesFunctionalSpecificationStandard.2Thisstandardrequiresthatafunctionalspecificationbepreparedthat(I)identifiesthefunctionofthevalveassemblyinsystemsimportanttosafetyand(2)delineatesthesetofconditionsimportanttovalveassemblyoperability.ANSIN278.1-1975establishesaconsistentapproachtospecifyingtheminimuminformationneededtoidentifytherequirementsforfunctionandoperabilityofvalveassembliesinsystemsimportanttosafety.Althoughthestandardhasnotbeenextensivelyused,itisapparentthatitwouldbeusefulforanyQualityGroupA,B,C,orDvalveassemblyinsystemsimportanttosafety.However,therearequestionsrelativetowhetherthisdetailedfunctionalspecificationisnecessaryforall(orforcertainspecified)valveassembliesinsystemsimportanttosafety.Itisanticipatedthatthebreadthofapplicationofthisstandardmightdevelopgraduallywithuserexperience,qualitygroupclassificationofaparticularvalveassembly,andvalveassemblyfunctionwithinagivenplantsystem.Inthiscontext,specificationswouldmostlikelyevolvefromsystemsanalysesand,assuch,couldbecompatiblewithapplicablesystemsafetycriteriathroughappropriateuseoflimitrange,maxima,minima,envelopeofimportantparameters,orgenerallyacceptedapproachesconsistentwithindustrypractice.Itisevidentthatathoroughprocesstoidentifyspecificvalveassembliesthatshouldhavefunctionalspecifications3Avalveassemblyiscomposedofthepressure-retainingpartsofthevalvebody,internals,actuator,andfunctionalaccessories.USNRCREGULATORYGUIDESCommentsshouldbesenttotheSecretaryoftheCommission,U.S.NuclearRegulatoryCommission,Washington,D.C.20555,RegulatoryGuidesareissuedtodescribeandmakeavailabletotheAttention:DocketingandServiceBranch.publicmethodsacceptabletotheNRCstaffofimplementingspecificpartsoftheCommission'sregulations,todelineatetech-TheguidesareissuedInthefollowingtenbroaddivisions:niquesusedbythestaffinevaluatingspecificproblemsorpostulatedaccidentsortoprovideguidancetoapplicants.Regulatory1.PowerReactors6.ProductsGuidesarenoisubstitutesforregulations,andcompliancewith2.ResearchandTestReactors7.TransportationthemIsnotrequired.Methodsandsolutionsdifferentfromthoseset3.FuelsandMaterialsFacilities8.OccupationalHealthoutintheguideswillbeacceptableIftheyprovideabasisforthe4.EnvironmentalandSiting9.AntitrustandFinancialReviewfindingsrequisitetotheissuanceorcontinuanceofapermitor5.MaterialsandPlantProtection10.GenerallicensebytheCommission.CopiesofissuedguidesmaybepurchasedatthecurrentGovernmentCommentsandsuggestionsforimprovementsintheseguidesarePrintingOfficeprice.AsubscriptionserviceforfutureguidesInspeencouragedatalltimes,andguideswillberevised,asappropriate,cificdivisionsIsavailablethroughtheGovernmentPrintingOffice.toaccommodatecommentsandtoreflectnewinformationo