ASTM C1030-2010 用γ射线光谱法测定钚同位素成分的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofPlutoniumIsotopicCompositionbyGamma-RaySpectrometry
【原文标准名称】:用γ射线光谱法测定钚同位素成分的标准试验方法
【标准号】:ASTMC1030-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:C26.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:镅-241;量热法;γ射线光谱测定;同位素的;中子计数;无损检测;钚;特种核材料;铀;γ辐射核材料的应用;γ射线光谱测定法;锗探测器;同位素分析;钚元素
【英文主题词】:americium-241;calorimetry;gamma-rayspectrometry;isotopics;neutroncounting;nondestructiveassay;plutonium;specialnuclearmaterial;uranium;Gammaradiation--nuclearmaterials/applications;Gamma-rayspectrometry;Germaniumdetectors;Isoto
【摘要】:Thedeterminationofplutoniumisotopiccompositionbygamma-rayspectrometryisanondestructivetechniqueandwhenusedwithothernondestructivetechniques,suchascalorimetry(TestMethodC1458)orneutroncounting(TestMethodsC1207,C1316,C1493,andC1500),canprovideawhollynondestructiveplutoniumassaynecessaryformaterialaccountancyandsafeguardsneeds.Becausegamma-rayspectrometrysystemsaretypicallyautomated,theroutineuseofthetestmethodisfast,reliable,andisnotlaborintensive.Thetestmethodisnondestructive,requiresnosamplepreparation,anddoesnotcreatewastedisposalproblems.Thistestmethodassumesthatallplutoniuminthemeasureditemhasthesameisotopicdistribution,oftencalledisotopichomogeneity(see7.2.4and7.2.5).The242Puabundanceisnotmeasuredbythistestmethodandmustbeestimatedfromisotopiccorrelationtechniques,streamaverages,historicalinformation,orothermeasurementtechniques.Americium-241isadaughterproductof241Pu.The241Am/239Puatomratiocanalsobedeterminedbymeansofthistestmethod(assumingahomogeneousisotopicdistributionofplutoniumand241Am).Thedeterminationofthe241Am/239Puatomratioisnecessaryforthecorrectinterpretationofacalorimetricheatmeasurement.Theisotopiccompositionofagivenbatchoritemofplutoniumisanattributeofthatitemand,oncedetermined,canbeusedinsubsequentinventorymeasurementstoverifytheidentityofanitemwithinthemeasurementuncertainties.Themethodcanalsomeasuretheratioofothergamma-emittingisotopestoplutoniumassumingtheyhavethesamespatialdistributionastheplutoniumintheitem.Someofthesex201C;otherx201D;gamma-emittingisotopesincludeisotopesofuranium,neptunium,curium,cesium,andotherfissionproducts.Thesamemethodsofthisstandardcanbeusedtomeasuretheisotopiccompositionofuraniuminitemscontainingonlyuranium(3,4,5,6).1.1Thistestmethodisapplicabletothedeterminationofisotopicabundancesinisotopicallyhomogeneousplutonium-bearingmaterials.Thistestmethodmaybeapplicabletootherplutonium-bearingmaterials,someofwhichmayrequiremodificationstothedescribedtestmethod.1.2Theprocedureisapplicabletoitemscontainingplutoniummassesrangingfromafewtensofmilligramsuptothemaximumplutoniummassallowedbycriticalitylimits.1.3Measurablegammarayemissionsfromplutoniumcovertheenergyrangefromapproximately30keVtoabove800keV.K-X-rayemissionsfromplutoniumanditsdaughtersarefoundintheregionaround100keV.Thistestmethodhasbeenappliedtoallportionsofthisbroadspectrumofemissions.1.4Theisotopicabundanceofthe242Puisotopeisnotdirectlydeterminedbecauseithasnousefulgamma-raysignature.IsotopiccorrelationtechniquesmaybeusedtoestimateitsrelativeabundanceRefs(1)and(2).1.5Thistestmethodhasbeendemonstratedinroutineuseforisotopicabundancesrangingfrom99tox003C;50%239Pu.Thistestmethodhasalsobeenemployedforisotopicab......
【中国标准分类号】:F50
【国际标准分类号】:27_120_30
【页数】:8P.;A4
【正文语种】: