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RevisionI~REO1July1978011fa,A-,U.S.NUCLEARREGULATORYCOMMISSION42tiREGULATORYGUIDEOFFICEOFSTANDARDSDEVELOPMENTREGULATORYGUIDE1.68.2INITIALSTARTUPTESTPROGRAMTODEMONSTRATEREMOTESHUTDOWNCAPABILITYFORWATER-COOLEDNUCLEARPOWERPLANTSA.INTRODUCTIONGeneralDesignCriterion(GDC)1,QualityStandardsandRecords,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,DomesticLicensingofProductionandUtilizationFacilities,requiresthatstructures,systems,andcomponentsimportanttosafetybetestedtoqualitystandardscommensuratewiththeimportanceofthesafetyfunctionstobeperformed.CriterionXI,TestControl,ofAppendixB,QualityAssuranceCriteriaforNuclearPowerPlants,td10CFRPart50requiresthataprogrambeestablishedtoensurethatalltestingnecessarytodemonstratethatstructures,systems,andcomponentswillperformsatisfactorilyinservicebeidentifiedandconducted.GDC19,ControlRoom,ofAppendixAto10CFRPart50requiresthatequipmentatappropriatelocationsoutsidethecontrolroombeprovided(1)withadesigncapabilityforprompthotshutdown'ofthereactor,includingnecessaryinstrumentationandcontrolstomaintaintheunitinasafeconditionduringhotshutdown,and(2)withapotentialcapabilityforsubsequentcoldshutdownofthereactorthroughtheuseofsuitableprocedures.RegulatoryGuide1.68,InitialStartupTestProgramsforWater-CooledReactorPowerPlants,describesamethodacceptabletotheNRCstaffforcomplyingwiththeCommission'sregulationswithregardtopreoperationalandinitialstartuptestingofIThetermhotshutdownusedinGDC19correspondstothetermhotstandbyasdefinedintheStandardTechnicalSpecifications.Thetermhotstandbywillbeusedinthisguide.ColdshutdownisalsodefinedintheStandardTechnicalSpecifications.*Linesindicatesubstantivechangesfrompreviousissue.nuclearpowerplantstructures,systems,andcomponents.ThisguidedescribesaninitialstartuptestprogramacceptabletotheNRCstafffordemonstratinghotstandbycapabilityandthepotentialforcoldshutdownfromoutsidethecontrolroom.Thisguideisapplicabletowater-coolednuclearpowerplants.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.B.DISCUSSIONRegulatoryGuide1.68listsasoneofitsinitialstartupteststhedemonstrationofshutdownfromoutsidethecontrolroom,thecapabilityforwhichisrequiredbyGDC19.ExperienceintheapplicationofRegulatoryGuide1.68hasshownthatamplificationofguidanceforinitialtestprogramsinthisareaisdesirable.Forexample,someapplicantshavenotconstruedthisprovisionofRegulatoryGuide1.68toincludedemonstrationofreactortripcapabilityfromoutsidethecontrolroom,butonlymaintenanceofthehotstandbycondition.Furtherguidancehasalsobeenrequiredtoclarifytheroleofadditionalpersonnellocatedinthecontrolroomduringthedemonstration,whosefunctionwouldbetoperformnon-safetyrelatedactivitiesthatwouldnotberequiredduringanactualemergencyshutdown.Finally,noinitialstartuptestprogramsreviewedtodatehaveincludedprovisionstofullydemonstratetherequirementsofthesecondpartofparagraphtwoofGDC19,namely,thepotentialforcoldshutdownfromoutsidethecbntrolroom.Thislastprovisionisofconsiderableimportancesincedemonstraticoofthiscapabilitylendstheaddedassurancethat,intheeventafireorothereventcausesthecontrolroomtobecomeUSNRCREGULATORYGUIDESCommentsshouldbeamttotheSocrearyoftheCommission.US.NuclearRequ,GltoryCommission.Washington.D.C.20556.Attention:DocketingandserviceRegulatoryGuidesareIssuedtodescribemidmakeeavilabletothepublicitethods'nhacceptabletotheNRCetafiofimplemarntingspecificpertsoftheCommission'sregulations.todelineatetechniquesusedbythestaffinevaluatingepecificproblemsTheguidesweissuedinthefollowingtenbroaddivisions:orpostulatedaccidents,ortoprovideguidancetoapplicants.RegulatoryGuidesorenotsubstitutesforregulations.asndcompliancewiththemisnotrequired.1.PowesReaciors6-ProductsMethodsandtclutionsdifferentfromthosesetoutintheguideswillbe-1p-2.ResearchandTestReactors7.Transportation3.FuelsandMaterialsFacilitiesB.OccupationalHealtheboIftheyprovideabasisforthefindingsrequisitetotheissuanceorcontinuance4.EnvironmentalandSiting9.AntitrustRevifwofapermitorlicensebytheCommission.6.MaterialsaonlPlantProtection10.GeneralCommentsandfuestlouoforimtprovementsIntheseguidesWreancou•OdsItallRequestsforsinglecopiesofissuedguides1whichmaybereroduced)orforPlacetimes.elndguideswillberevised.asatpropriate.toaccommodatecommentsandmantonanautomaticdistributionlistforsinglecopiesofluture-guidesinspecifictoreflectnewinformationorexperience.Thisguidewasrevisedasarasultof.divisionsshouldbemadeinwritingtotheUS.NuclearRegulatoryCommispon.substantivecommentsreceivedfromshepublicandadditionalgaffreview.Washington.D.C.206556.Attention:Director.DivisionofDocumentControl.-unusableforanindeterminatelength-oftime,nodangertothehealthandsafetyofthepublicfrompotentiallossof/controlledresidualheatremovalcapabilitywouldresult.Althoughitisconsideredthatthelikelihoodoflarge-scalecontrolroomdamagefromanypostulatedeventisverysmall,thedefense-in-depthconceptpracticedinthedesign,testing,andinspectionofnuclearpowerplants(specifically,inthecaseofremoteshutdowncapability,assetforthinGDC19)mandatesthatallpract