RG1.068.3 仪控空气系统的运行前试验 1982

SU.S.NUCLEARREGULATORYCOMMISSIONil98RREGULATORYGUIDEOFFICEOFNUCLEARREGULATORYRESEARCHREGULATORYGUIDE1.68.3(TaskRS7Q94)PREOPERATIONALTESTINGOFINSTRUMENTANDCONTROLAIRSYSTEMSA.INTRODUCTIONGeneralDesignCriterion1,QualityStandardsandRecords,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to1OCFRPartso,DomesticLIcensingofProductionandUtilizationFacilities,requiresthatstructures,systems,andcomponentsimportanttosafetybetestedtoqualitystandardscommensuratewiththeimportanceofthesafetyfunctionstobeperformed.CriterionXl,TestControl,ofAppendixB,QualityAssuranceCriteriaforNuclearPowerPlantsandFuelReprocessingPlants,to10CFRPartSOrequiresthat.atestprogrambeestablishedtoensurethatalltestinincludingpreoperationaltesting,requiredtodemonstratethatstructures,systems,andcomponentswillperformsatisfactorilyinserviceisIdentifiedandperformed.Instrumentandcontrolairsystemssupplypressurizedairtooperatevariousloads,includingcomponentsandsystemsthatarerequiredtoperformfunctionsimportant.tosafety.Thisguide,whichisarevisionofandreplacesRegulatoryGuide1.80,describesamethodacceptabletotheNRCstaffforcomplyingwiththeCommission'sregulationswithrespecttopreoperationaltestingtoverifythatinstrumentandcontrolairsystems'andtheloadstheysupplywilloperateproperlyatnormalsystempressuresandtoensuretheoperabilityoffunctionsimportanttosafetyintheeventthatsystempressureislost,reducedbelownormaloperatinglevel,orincreasedabovethedesignpressureoftheairsystemcomponentstotheupstreamsafetyvalvea6-umulationpressure.BDISCUSSIONInstrumentandcontrolsirsystemstypicallyfurnishpressurizedairtoawidevarietyofequipmentinnuclearpowerplants.TheextenttowhichsuchairsystemsareusedITherecommendationsofthiguideshouldasobeappBidto(1)omprdgssytaistht,lthoghmotdesignatedasbastuwwIentandcontrolairsystems.suIpploadsthatouldafect!U_ovralsafetyasduarecioeplant,3M)epnedaId()emsiaiotanttomaetythat.ewemwPeasothertamsk.USNRCREGULATORYGUIDESRegulatoryGuidesareIssuedtodescribeandmakeavailabletothepublicmethodsacceptabletotheNRCstaffofImplementingspecificpartsoftheCommission'sregulations,todelineatetechniquesusedbythestaffInevaluatingspecificproblemsorpostulatelaccidentsortoprovideguidancetoapplicants.RegulatoryGuidesarenotsubstitutesforregulations,andcompliancewitthemIsnotrequired.MethodsandsolutionsdifferentfromthosesetOutIntheguideswillbeacceptableIftheyprovideabasisfortheSfindingsrequisitetotheIssuanceor¢ontinuanceofapermitoricernsebytheCommission.ThisgulewasIssuedafterconsiderationofcommentsreceivedfromthegublic.CommentsandsuggestionsforImprovementsIntheseguidesareencouragedatalltimes,andguides.willPerevised,asappropriate,toaccommodatecommentsandtoreflectnewnfmornmationorexperience.varieswithdifferentdesignsofboththenuclearandthebalance-of-plantportionsofthefacility.Becauseofthediversityofloadsbormallysupplied,thereisapossibilityforunsafeintencs.Theefore,ftisimportantthattestingbedonetoverifyproperfunctioningduringaorpWaoperationandtodeterminetheeffectsoftotalloss,reduction,orincreaseofthepressurewithintheentireinstrumentandcontrolairdistributionsystemandportionsthereof.Itisessentialthattestingverifythatthesystemwillrespondappropriatelytobothnormaloperationoftheplantandupset,faulted,oremergencyconditionswith.considerationbeinggivento(1)completeandsuddenlossofpressureresultingfromsuchpostulatedeventsasinadvertentvalveoperationinthesupplysystem,severanceofasystempipe,lossofoffaiteelectricpower,lossofd.c.power,andcomponentmalfunction;(2)partialorgraduallossofsystempressur:totheentiredistributionsystemorportionsthereofresultingfromsuchevents;and(3)increasesinpressureduetocomponentmalfunctionorfailure..Air-opemtedvalveandothera*.opehtedcomponentsarenormallydesignedtorespondinagivenmainer,Le.,failcpenfailclosed,orfailusis,iftheInstrumentandcontrolaisupplyislostoritspressureisroducedorincreused.Verficationofsystemresponsetoaiossof-4ir-pressureeventIsanessentialpartoftestingatthepreoperationalstage,atwhichtimeitcanbeaccomplishedwithaminimumrisktopowerplantequipmentandpersonnel.Testingalsoprovidesameansfordeterminingtheadequacyofoperatigandemergencyproceduresforcopingwithalossofsirsupply.Preoperationaltestingoftheinstrumentandcontrolairsystemfollowingconstructionoftheplantandinstallationoftheinstrumentandcontrolairsystemwillhelpensurethattheairsupplyequipment(compressorsandassociatedcontrolsandbackupaIrsupplies)andtheequipmentprovidedtomaintainthequalityofairsupplied(e.g.,filtersanddryer)willfunctionwithindesignrequirements.CommentsshoulbesnoteScearfteCmllncommentsshouldbesenttothleSecetrarfyoftheaCommission.U.S.NuclearRegulatoryCommissionsWashIngton,D.C.20555,AttentionsDocketingendServiceBranch.TheguidesareIssuedInthefollowingtenbroaddivisions:1.PowerReactors.Products£ResearchandTestReactors1.TransportationFuelsandMaterialsFacilities8.OccupationalHealthEnvironmentalendSiting9.AntitrustandFinancialReviewS.MaterialsandPlantProtectlonI0LGeneralCoplesofissudguidesmaybepurchasedattheacurrentGovernmsentP~rintl~ngOflcprice.AsubscriptionserviceNiffutureguidesInspeeCitcd~Isionslitavailleathrought