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【英文标准名称】:StandardGuideforUnrestrictedDispositionofBulkMaterialsContainingResidualAmountsofRadioactivity
【原文标准名称】:含放射性残余物的松散材料的无约束处理的标准指南
【标准号】:ASTME1760-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E10.03
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:decontaminationanddecommissioning;radiologicallycontaminatedmaterials;releaseofmaterials;Contamination--nuclear;Radiationexposure--nuclearmaterials/applications;Radioactivewastematerials;Residualradioactivity;Traceelements--nuclear
【摘要】:MaterialsencounteredduringDx0026;Dmaycontainresidualradioactivityvaryinginamountsfromthatinirradiatedfueltobarelydetectablequantitiesinoronbuildingmaterials.Itisclearthathighlyradioactivematerialshavetobedisposedasradioactivewastepursuantto10CFR60and10CFR61.Conversely,itisnotreasonabletoexpendadisproportionateamountofresourcestoisolatematerialsthatcontainminutequantitiesofradioactivematerialsthatwillnotcauseevenstatisticallymeasurablehealtheffects.Thisguideprovidesarationaleandmethodologyfordistinguishingbetweenmaterialsthatcontainsufficientradioactivitytowarrantisolationofsometype(storageawaitingdecay,near-surfacedisposal,disposalwithintruderprotection,orplacementinadeeprepository)frommaterialswithinsignificantradioactivecontent.Materialswithinsignificantradioactivecontentcanberecycledintheeconomyordisposedofinconventional(landfill)facilitieswithoutadversehealtheffects.Materialsthatmeetthecriteriaidentifiedinthisguidearenotsimplyexcludedfromregulationbecausetheydonotfallpreciselyintheregulatoryscope.Theyaresufficientlyfreeofradioactivematerialsothatnofurthereffortsatcontrolarejustifiedforradiationprotectionpurposes.Therefore,thereleaseofmaterialsforunrestricteduseinaccordancewiththisguidemeetsthecriteriaforbeinganx201C;aslowasreasonablyachievablex201D;(ALARA)activity.Forthepurposeofthisguide,thereturnofmaterialscontainingresidualradioactivitytosocietywithoutregulatoryrestrictionsisreferredtoasx201C;unrestrictedreleasebasedontheabsenceofthecrediblepotentialforadversehealtheffects.x201D;Thisguideassertsthatmaterialsrecycledthiswaywillhavenostatisticallymeasurablehealtheffectsregardlessofuse.Itdoesnotguaranteethatthematerialsaresuitableforuseineverypossibleapplication,forexample,traceamountsofradionuclidesinmaterialsmaynotbeacceptableforcertainphotographicandelectronicapplications.Thisguidealsoassertsthattheownerofthematerialsisresponsibleforensuringthatsociety''scriteriaforx201C;nomeasurablehealtheffectsx201D;ismetbeforerelease,andthattheresponsibilityforprovidingmaterialswiththepurityrequiredforaspecialapplicationrestsnotwiththeowner,butwiththedeveloperofthatapplication.1.1Thisguidecoversthetechniquesforobtainingapprovalforreleaseofmaterialsencounteredindecontaminationanddecommissioning(Dx0026;D)fromrestricteduse.Thiswouldbeaddressedinthedecommissioningplan(E1281).Itappliestomaterialsthatdonotmeetanyoftherequirementsforregulatorycontrolbecauseofradioactivitycontent.Fig.1showsthelogicdiagramfordeterminingthematerialsthatcouldbeconsideredforrelease.Materialsthatnegotiatethislogictreearereferredtoasx201C;candidateforreleasebasedondose.x201D;1.2Theobjectiveofthisguideistoprovideamethodologyfordistinguishingbetweenmaterialthatmustbecarefullyisolatedtopreventhumancontactfromthatthatcanberecycledorotherwisedisposedof.Itappliestomaterialinwhichtheradioactivityisdispersedmoreorlessuniformlythroughoutthevolumeofthematerial(termedresidualinbulkform)asopposedtosurfacecontaminatedobjects.1.3Surfacecontaminatedobjectsarematerialsexternallycontaminatedwithradioactivematerial.Provisio......
【中国标准分类号】:Z33
【国际标准分类号】:13_030_40
【页数】:6P.;A4
【正文语种】:英语