RG1.111 LWR气体排放物大气转移与弥散计算 1977

Revision1U.S.NUCLEARREGULATORYCOMMISSIONJuly1977REGULATORYGUIDEOFFICEOFSTANDARDSDEVELOPMENTREGULATORYMETHODSFORESTTRANSPORTANDDISPERMINROUTINERELEASESFR&L9USNRCREGULATORYGUIDESRegulatoryGuidesareissuedtodescribeandmikeavailabletothepublicmethodsacceptabletotheNRCstaffofimplementingspecilicpartsoftheCommeissionesregulations,todelineatetechniquesusedbythestaffinevaluatingsterificprot;lemsorpostulatedaccidents,ortoprovideguidancetoApplicants.RegulatoryGuideswenotsublitulesforregulations.endcompliancewiththemisnotrequired.Methodsandso!utiotdliffer.'#,n-thnw-oiui'theg*-iidmwillbeP~r,4eableiftheyprovideabasisforthefindingsrequisitetotheissuanceorcontinuanceofapermitorlicesebytheConsns1nsion.•Commentsandsuggestionsforinprovetentsintheseguidesaweencouragedatilltimes,andguideswillberevised.asappropriate.toaccommodatecommentsandtoreflectnewinformationorexperience.Thisguidewrevisedasaresultof_ubetantiecommentsrfeeivedfromthepublicAndadditionalstaffrevinw.!GASEOUSEFFLUENTS-WATER-COOLEDREACTORSCommentsshouldbesenttotheSecretaryoftheCommission.US.NuclearRegulatoryCommission,Washington.D.C.20566.Attention:DocketingendServiceBranch.Theguidesareissuedinthefollowingtenbroaddivisions$I.PowerReactors6.Products2.ResearchendTestReactors7.Transportation3.FuelsantiMaterialsFaciiitiesSOccualtional4feahh4.EnvironmentalandSitingg.AntitrustReviewS.MaterialsandPlantProtection10.GeneralRequestsforsinglecopiesofwsuedguides(whichmayberepirodueadlorforplacemantonanautomaticdistributionlistforsinglecopiesoffutureguidesinspecificdivisionsshouldbemadeinwritingtotheUS.NuclearRegulatoryCommission.Washington,D.C.2055.Attention:Director.DivisionolDocumentControl.I;TABLEOFCONTENTSPageA.INTRODUCTION......................................................1.111-5B.DISCUSSION........................................................1.111-51.DiffusionModels................................................1.111-5a.VariableTrajectoryModels.......................................1b.ConstantMeanWindDirectionModels...............................1.111-62.ReleaseModec....................................................1.111-63.RemovalMechanisms..............................................1.111-7C.REGULATORYPOSITION..........................................................1.111-71.AtmosphericTransportandDiffusionModels............................1.111-7a.Particle-in-Cell(PIC)Model....................................1.111-7b.PlumeElementModels..........................................1.111-8c.ConstantMeanWindDirectionModels...............................1.111-92.SourceConfigurationConsiderations.......................................1.111-10a.ElevatedReleases.........................................................1.111-10b.ReleasesOtherThanElevated...e.s.....................................1.111-11c.BuildingWakeCorrection..............................................1.111-113.RemovalMechanismConsiderations....................................1.111-12a.RadioactiveDecay.........................................................1.111-12b.DryDeposition1.111-12c.WetDeposition...............................................1.111-12d.DepositionOverWater........................................1.111-134.MeteorologicalDataforModels......................................1.111-13D.IMPLEMENTATION...........................................................1.111-14REFERENCES.........................................................1.111-151.111-3LISTOFFIGURESFigurePage1.VerticalStandardDeviationofMaterialinaPlume..........................1.111-162.PlumeDepletionEffectforGround-LevelReleases............................1.111-173.PlumeDepletionEffectfor30-mReleases....................................1.111-184.PlumeDepletionEffectfor60-mReleases.....................................1.111-195.PlumeDepletionEffectfor100-mReleases....................................1.111-206.RelativeDepositionforGround-LevelReleases...............................1.111-217.RelativeDepositionfor30-mReleases....................................1.111-228.RelativeDepositionfor60-mReleases.......................................1.111-239.RelativeDepositionfor100-mReleases.......................................1.111-24K1.111-4KA.INTRODUCTIONSection20.106,RadioactivityinEffluentstoUnrestrictedAreas,of10CFRPart20,StandardsforProtectionAgainstRadiation,establisheslimitsonconcentrationsofradioactivematerialineffluentstounrestrictedareas.Paragraph20.1(c)of10CFRPart20statesthatlicenseesshould,inadditiontocomplyingwiththelimitssetforthinthatpart,makeeveryreasonableefforttomaintainradiationexposures,andreleasesofradioactivematerialsineffluentstounrestrictedareas,asfarbelowthelimitsspecifiedinthatpartasisreasonablyachievable.Section50.34a,DesignObjectivesforEquipmenttoControlReleasesofRadioactiveMaterialinEffluents-NuclearPowerReactors,of10CFRPart50,LicensingofProductionandUtilizationFacilities,setsforthdesignobjectivesforequipmenttocontrolreleasesofradioactivematerialIneffluentsfromnuclearpowerreactors.Section50.36a,Technical