RG1.155 全厂断电 1988

U.S.NUCLEARREGULATORYCOMMISSIONAugust1988REGULATORYGUIDEOFFICEOFNUCLEARREGULATORYRESEARCHReissuedtocorrectREGULATORYGUIDE1.155Tables1,(TaskSI5014)5,and6.STATIONBLACKOUTA.INTRODUCTIONCriterion17,ElectricPowerSystems,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,DomesticLicensingofProductionandUtilizationFacilities,includesarequirementthatanonsiteelectricpowersystemandanoffsiteelectricpowersystembeprovidedtopermitfunctioningofstructures,systems,andcomponentsimportanttosafety.Criterion1,QualityStandardsandRecords,ofAppendixAto10CFRPart50includesarequirementforaqualityassuranceprogramtoprovideadequateassurancethatstructures,systems,andcomponentsimportanttosafetywillperformtheirsafetyfunctions.Criterion18,InspectionandTestingofElectricPowerSystems,ofAppendixAto10CFRPart50includesarequirementforappropriateperiodictestingandinspectionofelectricpowersystemsimportanttosafety.TheCommissionhasamendeditsregulationsin10CFRPart50.Paragraph(a),Requirements,of§50.63,LossofAllAlternatingCurrentPower,requiresthateachlight-water-coolednuclearpowerplantbeabletowithstandandrecoverfromastationblackout(ie,,lossoftheoffsiteelectricpowersystemconcurrentwithreactortripandunavailabilityoftheonsiteemergencyacelectricpowersystem)ofaspecifiedduration.Section50.63requiresthat,forthestationblackoutduration,theplantbecapableofmaintainingcorecoolingandappropriatecontainmentintegrity.Italsoidentifiesthefactorsthatmustbeconsideredinspecifyingthestationblackoutduration.Criteria1and18ofAppendixAto10CFRPart50apply-tosafety-relatedequipmentneededtocope-withstationblackoutandothersafetyfunctions.AppendixAofthisregulatoryguideprovidesqualityassuranceguidancefornon-safetysystemsandequipmentusedtomeettherequirementsof§50.63.ThisguidedescribesamethodacceptabletotheNRCstaffforcomplyingwiththeCommissionregulationthatrequiresnuclearpowerplantstobecapableofcopingwithastationblackoutforaspecifiedduration.Thisguideappliestoalllight-water-coolednuclearpowerplants.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.Anyinformationcollectionactivitiesrelatedtothisregulatoryguidearecontainedasrequirementsintherevisionof10CFRPart50thatprovidestheregulatorybasisforthisguide.TheinformationcollectionrequirementsinPart50havebeenclearedundertheOfficeofManagementandBudgetClearanceNo.3150-0011.B.DISCUSSIONThetermstationblackoutreferstothecompletelossofalternatingcurrentelectricpowertotheessentialandnonessentialswitchgearbusesinanuclearpowerplant.Stationblackoutthereforeinvolvesthelossofoffsitepowerconcurrentwithturbinetripandfailureoftheonsiteemergencyacpowersystem,butnotthelossofavailableacpowertobusesfedbystationbatteriesthroughinvertersorthelossofpowerfromalternateacsources.Stationblackoutandalternateacsourcearedefinedin§50.2.Becausemanysafetysystemsrequiredforreactorcoredecayheatremovalandcontainmentheatremovalaredependentonacpower,theconsequencesofastationblackoutcouldbesevere.In.theeventofastationblackout,thecapabilitytocoolthereactorcorewouldbedependentontheavailabilityUSNRCREGULATORYGUIDESTheguidesareIssuedinthefollowingtenbroaddivisions:RegulatoryGuidesareIssuedtodescribeandmakeavailabletothepublicmethodsacceptabletotheNRCstaffofimplementing1.PowerReactors6.ProductsspecificpartsoftheCommission'sregulations,todelineatetech-2.ResearchandTestReactors7.Transportationniquesusedbythestaffinevaluatingspecificproblemsorpostu-3.FuelsandMaterialsFacilities8.OccupationalHealthiatedaccidentsortoprovideguidancetoapplicants.Regulatory4.EnvironmentalandSiting9.AntitrustandFinancialReviewGuidesarenosubstitutesforregulations,andcompliancewith5.MaterialsandPlantProtection10.Generalthemisnotrequired.MethodsandsolutionsdifferentfromthosesetoutintheguideswillbeacceptableiftheyprovideabasisforthefindingsrequisitetotheissuanceorcontinuanceofapermitorCopiesofissuedguidesmaybepurchasedfromtheGovernmentlicensebytheCommission.PrintingOfficeatthecurrentGPOprice.InformationoncurrentGPOpricesmaybeobtainedbycontactingtheSuperintendentofThisguidewasIssuedafterconsiderationofcommentsreceivedfromDocuments,U.S.GovernmentPrintingOffice,PostOfficeBoxthepublic.CommentsandsuggestionsforImprovementsinthese37082,Washington,DC20013-7082,telephone[phone]orguidesareencouragedatalltimes,Andguideswillberevised,as(202)275-2171.appropriate,toaccommodatecommentsandtoreflectnewinformationorexperience.IssuedguidesmayalsobepurchasedfromtheNationalTechnicalWrittencommentsmaybesubmittedtotheRulesandProceduresInformationServiceonastandingorderbasis.DetailsonthisBranch,DRR,ADM,U.S.NuclearRegulatoryCommission,servicemaybeobtainedbywritingNTIS,5285PortRoyalRoad,Washington,DC20555.Springfield,VA22161.ofsystemsthatdonotrequireacpowerfromtheessentialandnonessentialswitchgearbusesandontheabilitytorestoreacpowerinatimelymanner.Theconcernaboutstationblackoutarosebecauseoftheaccumulatedexperienceregardingthereliabilityofacpowersupplies.Manyoperatingplantshaveexperiencedatotallossofoffsiteelectricpower,andmoreoccurrencesareexpectedinthef