RG1.197 控制室密闭完整性证明 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-1115)DEMONSTRATINGCONTROLROOMENVELOPEINTEGRITYATNUCLEARPOWERREACTORSA.INTRODUCTIONAppendixA,“GeneralDesignCriteriaforNuclearPowerPlants,”to10CFRPart50,“DomesticLicensingofProductionandUtilizationFacilities,”establishestheprincipaldesigncriteriaforthedesign,fabrication,construction,testing,andperformancerequirementsforstructures,systems,andcomponentsimportanttosafety.GeneralDesignCriterion19(GDC-19),“ControlRoom,”ofAppendixArequiresthatacontrolroombeprovidedfromwhichactionscanbetakentooperatethenuclearreactorsafelyundernormalconditionsandmaintainthereactorinasafeconditionunderaccidentconditions,includingaloss-of-coolantaccident(LOCA).Adequateradiationprotectionistobeprovidedtopermitaccessandoccupancyofthecontrolroomunderaccidentconditionswithoutpersonnelreceivingradiationexposuresinexcessofspecifiedvalues.AppendixB,“QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,”to10CFRPart50establishesqualityassurancerequirementsforthedesign,construction,andoperationofthosestructures,systems,andcomponentsthatpreventormitigatetheconsequencesofpostulatedaccidentsthatcouldcauseunduerisktothehealthandsafetyofthepublic.CriterionIII,“DesignControl,”ofAppendixBrequiresthatdesigncontrolmeasuresprovideforverifyingorcheckingtheadequacyofdesign.Asuitabletestingprogramisidentifiedasonemethodofaccomplishingthisverification.1.197-2ThisguideprovidesanapproachacceptabletotheNRCstaffformeasuringinleakageintothecontrolroomandassociatedroomsandareasatnuclearpowerreactors.Theamountofinleakageisaninputtothedesignofthecontrolroom,andperiodicverificationoftheinleakageprovidesassurancethatthecontrolroomwillbehabitableduringnormalandaccidentconditions.Thisguideprovidesguidanceonmethodsacceptabletothestafffordeterminingcontrolroomenvelope(CRE)integrityforthepurposeofconfirmingthatthereactormeetsGDC-19.Theinformationcollectionscontainedinthisregulatoryguidearecoveredbytherequirementsof10CFRPart50,whichwereapprovedbytheOfficeofManagementandBudget(OMB),approvalnumber3150-0011.IfameansusedtoimposeaninformationcollectiondoesnotdisplayacurrentlyvalidOMBcontrolnumber,theNRCmaynotconductorsponsor,andapersonisnotrequiredtorespondto,theinformationcollection.B.DISCUSSIONTheterms“controlroom”and“CRE”appearfrequently.ThesetermsaredefinedinRegulatoryGuide1.196,“ControlRoomHabitabilityatNuclearPowerReactors”(Ref.1).Thedefinitionsforcontrolroomandthecontrolroomenvelopearerepeatedhere.ControlRoom:Theplantarea,definedinthefacilitylicensingbasis,inwhichactionscanbetakentooperatetheplantsafelyundernormalconditionsandtomaintainthereactorinasafeconditionduringaccidentsituations.Itencompassestheinstrumentationandcontrolsnecessaryforasafeshutdownoftheplantandtypicallyincludesthecriticaldocumentreferencefile,thecomputerroom(ifusedasanintegralpartoftheemergencyresponseplan),shiftsupervisor'soffice,theoperatorwashroomandkitchen,andothercriticalareastowhichfrequentpersonnelaccessorcontinuousoccupancymaybenecessaryintheeventofanaccident.ControlRoomEnvelope(CRE):Theplantarea,definedinthefacilitylicensingbasis,thatintheeventofanemergencycanbeisolatedfromtheplantareasandtheenvironmentexternaltotheCRE.Thisareaisservedbyanemergencyventilationsystem,withtheintentofmaintainingthehabitabilityofthecontrolroom.Thisareaencompassesthecontrolroomandmayencompassothernon-criticalareastowhichfrequentper