RG1.061 核电厂扩展设计阻尼值 1973

flitntwr10721\U.S.ATOMICENERGYCOMMISSIONREGULATORYGUIDEDIRECTORATEOFREGULATORYSTANDARDSREGULATORYGUIDE1.61DAMPINGVALUESFORSEISMICDESIGNOFNUCLEARPOWERPLANTSA.INTRODUCTIONCriterion2,DesignBasesforProtectionAgainstNaturalPhenomena,ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50,LicensingofProductionandUtilizationFacilities,requires,inpart,thatnuclearpowerplantstructures,systems,andcomponentsimportanttosafetybedesignedtowithstandtheeffectsofearthquakes.ProposedAppendixA,SeismicandGeologicSitingCriteria,to1OCFRPart100,ReactorSiteCriteria:'wouldrequire,inpart,thatsuitableseismicdynamicanalysis,suchasatime-historyorspectralresponse.analysis,beperformedtodemonstratethatthestructures,systems,andcomponentsimportanttosafetywillremainfunctionalintheeventofaSafeShutdownEarthquake(SSE).ThisguidedelineatesdampingvaluesacceptabletotheAECRegulatorystafftobeusedintheelasticmodaldynamicseismicanalysisofSeismicCategoryIPstructures,systems,andcomponents.TheAdvisoryCommitteeonReactorSafeguardshasbeenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.B.DISCUSSIONTheenergydissipationwithinastructureduetomaterialandstructuraldampingwhileitisrespondingtoanearthquakedependsonanumberoffactorssuchastypesofjointsorconnectionswithinthestructure,thestructuralmaterial,andthemagnitudeofdeformationsexperienced.Inadynamicelasticanalysis,thisenergydissipationusuallyIsaccountedforbyspecifyinganamountofviscousdampingthatwouldresultinenergy5Structures,systems,andcomponentsofanuclearpowerplantthataredesignatedasSeismicCategoryIaredesignedtowithstandtheeffectsoftheSafeShutdownEarthquake(SSE)andremainfunctional(seeRegulatoryGuide1.29,SeismicDesignClassification).dissipationintheanalyticalmodelequivalenttothatexpectedtooccurasaresultofmaterialandstructuraldampingintherealstructure.Afterreviewinganumberofapplicationsfor.constructionpermitsandoperatinglicensesandafterreviewingpertinentliteratureincludingReferenceI,theAECRegulatorystaffhasdeterminedasacceptable,forinterimuse,themodaldampingvaluesshowninTableIofthisguide.Thesemodaldampingvaluesshouldbeusedforallmodesconsideredinelasticspectralortime-historydynamicanalyses.Valuesaretabulatedforthetwoearthquakes,theSafeShutdownEarthquakeandtheOperatingBasisEarthquake(or%theSafeShutdownEarthquake),forwhichnuclearpowerplantsarerequiredtobedesignedasspecifiedinproposedAppendixAto10CFRPart100,SeismicandGeologicSitingCriteria.C.REGULATORYPOSITION1.ThemodaldampingvaluesexpressedasapercentageofcriticaldampingshowninTableIofthisguideshouldbeusedforviscousmodaldampingforallmodesconsideredinanelasticspectralortime-historydynamicseismicanalysisoftheSeismicCategoryIstructuresorcomponentsspecifiedinthetable.ThemodaldampingvaluesspecifiedinTableIareforuseinthedynamicanalysesassociatedwithtwodifferentmagnitudesofearthquakes,theSafeShutdownEarthquakeandtheOperatingBasisEarthquake(or%theSafeShutdownEarthquake).TheseanalyseswouldberequiredbyproposedAppendixAto10CFRPart100,SeismicandGeologicSitingCriteria.2.DampingvalueshigherthantheonesdelineatedinTable1ofthisguidemaybeusedinadynamicseismicanalysisifdocumentedtestdataareprovidedtosupporthighervalues.USAECREGULATORYGUIDESCeodguidewbeobtaiedbyrequestIicamtinthedivilsonsdlmiredtotheUS.AtomicEnergyCommisson.Wshington.D.C.205M.4ReguhtmyGuidesraIssuedtodescrbeandmukssieithbi,toshepublicAttention:DiectorofRegulatoryStandardL.CommntsendegstflomftramuhodsecaptabletotheAECRegultory8tafofkplementinMqWedficiWtofIrnprosyentshIthne-guidesamencouragedendehouldbeeanttotheSemetaryVdConwidwion'regulations,todeilnetetahniqueswmdbythsffinoftheComnmikson.US.Aom:EneyComitsion.Washington.D.C.20545,evaluatingqecificproblemsorPostubtedecalm.ortoProvideguldnmtoAttantlo-Chief.PublicProdingsStEff.applicentIGuidesemrotsubstitutesforregulatiousandcompliancewithdmuisnotuequired.MethodeandsolutionsdiffagntforonhseautInTheigdeamIasuedInthefollowingunbroaddivisions:the=uidewillbeacctableItheyprovidoaEmi.fthendlgtpPquoRtaetactortheIsuacortonthtnnceofapermitor1E,ebytheCconisson.1.eRascto6.Pro1dts2.Re-rdiandTestReactors7.Tranportatin3.FueskendMaterialsFacilitiesL.OciaetolHealthpublished=ud~[e-mail]~omientulendSitingL.AttutRvewetnrontsandtsafetnwinforautiosorexperience.LMsatralsiandPlantProtection10.Generalp.3.Ifthemaximumcombinedstressesduetostatic,seismic,andotherdynamicloadingaresignificantlylowerthantheyieldstressand%yieldstressforSSEand%SSE,respectively,inanystructureorcomponent,dampingvalueslowerthanthosespecifiedinTableIofthisguideshouldbeusedforthatstructureorcomponenttoavoidunderestimatingtheamplitudeofvibrationsordynamicstresses.TABLE1DAMPINGVALUES'(PercentofCriticalDamping)OperatingBasisEarthquakeor%SafeSafeShutdownStructureorComponentShutdownEarthquakeDEarthquakeEquipmentandlarge-diameterpipingsystems',pipediametergreaterthan12In............23Small-diameterpipingsystems,diameterequaltoorlessthan12in.....................12Weldedsteelstructures...................24Boltedsteelstructures...................47Prestressedco