RG1.079 应急堆芯冷却系统ECC的运行前试验 1975

U.S.NUCLEARREGULATORYCOMMISSIONREGULATORYGUIDEOFFICEOFSTANDARDSDEVELOPMENTREGULATORYGUIDE1.79PREOPERATIONALTESTINGOFEMERGENCYCORECOOLINGSYSTEMSFORPRESSURIZEDWATERREACTORSA.INTRODUCTIONGeneralDesignCriterion1,QualityStandardsandRecords,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,LicensingofProductionandUtilizationFacilities,requiresthatstructures,systems,andcomponentsofnuclearpowerplantsimportanttosafetybetestedtoqualitystandardscommensuratewiththeimportanceofthesafetyfunctions.tobeperformed.CriterionXI,TestControl,ofAppendixB,QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,to10CFRPart50requiresthatatestprogrambeestablishedtoensurethatalltestingrequiredtodemonstratethatstructures,systems,-andcomponentswillperformsatisfactorilyinserviceisidentifiedandperformed.RegulatoryGuide1.68,PreoperationalandInitialStartupTestProgramsforWater-CooledPowerReactors,describesamethodacceptabletotheNRCstaffforcomplyingwiththeCommission'sregulationswithregardtopreoperationaltestingofnuclearpowerplantstructures,systems,andcomponentsthatperformsafety-relatedfunctions.Thisguidedescribesapreoperationaltestprogramacceptabletothestaffspecificallyforemergencycorecoolingsystems(ECCS)inpressurizedwaterreactorpowerplants.Althoughthisguideisapplicabletoallpressurizedwaterreactors,certainaspectsmaynotbecompletelyapplicabletospecificnuclearsteamsupplydesigns.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.*Unesindicatesubstantivechangesfrompreviousissue.Revision1September1975B.DISCUSSIONTheNRCstaffhasconcludedasaresultofrecentinspectionsandreviewsofsafetyanalysisreportsandstartupreportsthatadditionalguidanceshouldbeprovidedregardingthescopeandreportingofECCSpreoperationaltestingidentifiedinparagraph9,EmergencyCoreCoolingSystems,ofAppendixAtoRegulatoryGuide1.68.C.REGULATORYPOSITIONAcomprehensivepreoperationaltestprogramontheemergencycorecoolingsystemanditscomponentsshouldbeperformedtoprovideassurancethattheECCSwillaccomplishitsintendedfunctionwhenrequired.Theprogramshouldcoveralltest-relatedactivitiesincluding:1.'hedevelopmentoftestdescriptions,testobjectives,andspecificacceptancecriteria;2.•Thepreparationoftestprocedures;3.Conductofthetestsandacquisition.ofsystemandcomponentperformancedata;and4.Resolutionofdeficienciesanddeviationsfromexpectedperformance.1.SystemTestingThepreoperationaltestingofemergencycorecool-Iingsystemsshouldincludethetestsdescribedbelow.USNRCREGULATORYGUIDESCommentsshouldbesenttotheSecretaryoftheCommission.U.S.NuclearRegulatoryCommission.Washington,D.C.20M.Attention:DocketingandRegulatoryGuidesareissuedtodescribeendmakeavailabletothepublicServiceSection.methodsacceptabletotheNRCstaffofimplementingspecificpartsoftheCommission'sregulations.todelineatetechniquesusedbythestaffinevalu-Theguidesareissuedinthefollowingtenbroaddivisions:stingspecificproblemsorpostulatedaccidents,ortoprovideguidancetoapplicents.RegulatoryGuidesarenotsubstitutesforregulations.andcompliance1.PowerReactors1-Productswiththemisnotrequired.Methodsandsolutionsdifferentfromthosesetoutin2.ResearchandTestReactors7.Transportationtheguideswillbeacceptableiftheyprovideabasisforthefindingsrequisiteto3.FuelsandMaterialsFacilitiesS.OccupationalHealththeissuenceorcontinuanceofapermitorlicensebytheCommission.4.EnvironmentalandSitingS.AntitrustReviewCommentsandsuggestionsforimprovementsintheseguidesareencouragedS.MaterialsandPlantProtection10.Generalatalltimes.andguideswillberevised,asappropriate,toaccommodatecamMontsandtOreflectnewinformationorexperience.ThisguidewaorevisedasaCopiesofpublishedguidesmaybeobtainedbywrittenrequestindicatingtheresultofsubstantivecommentsreceivedfromthepublicandadditionalstaffdivisionsdesiredtotheU.SNuclearRegulatoryCommission.Washington.D-C.review20565.Attention:Director.OfficeofStandardsDevelopment.I1a.High-PressureSafetyInjection(HPSI)Thepreoperationaltestprogramshouldprovidefortestingofeachtrainoftheemergencycorecoolingsystemunderbothcoldandsimulatedhotoperatingconditionspriortofuelloading.(1)FlowTest-ColdConditions.Thereactorvesselmaybeopenandfloodedandthereactorcoolantsystem(RCS)pressureatessentiallyatmospheric(zerogaugepressure)conditions.NoattemptIsmadetocontrolthetemperatureofthewaterinthestoragetankorintheaccumulators.Thistestdemonstratessystemandcomponentcapabilitybyinjectingwater*fromthewaterstoragetankintothereactorvesselthroughvariouscombinationsofinjectionlegsandpumps.Thistestshouldbeinitiatedbythesafetyinjectionsignalwithallaffectedauxiliarysystemsintheirstandardoperatingmode.Itshouldbedemonstratedthattheflowratesdeliveredthrougheachinjectionflowpathusingallpumpcombinationsarewithinthedesignspecifications.Verificationofpropersystemactivationtimeshouldalsobeobtained.ThecapabilityoftheHPSIpumpstotakesuctionfromthelow-pressuresafetyinjectionpumpsshouldbedemonstratedinthoseplantsthatusethisschemetohandlethesmall-breakaccident.Thetestingshouldverifythatpumpmotorswillnottripoutundermaximumpossibleflowconditionsan