ASTM C1221-2010 γ射线光谱法无损分析均相溶液中特种核材料的标准试验方法

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【英文标准名称】:StandardTestMethodforNondestructiveAnalysisofSpecialNuclearMaterialsinHomogeneousSolutionsbyGamma-RaySpectrometry
【原文标准名称】:γ射线光谱法无损分析均相溶液中特种核材料的标准试验方法
【标准号】:ASTMC1221-2010
【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】:γ射线光谱法;无损检验;钚;特种核材料;铀;γ射线光谱测定法;无损评估(NDE)-核设施;SNM
【英文主题词】:gamma-rayspectroscopy;nondestructiveassay;plutonium;specialnuclearmaterial;uranium;Gamma-rayspectrometry;Nondestructiveevaluation(NDE)--nuclearapplications;Plutonium;SNM(specialnuclearmaterials);Uranium
【摘要】:Thistestmethodisanondestructivemeansofdeterminingthenuclideconcentrationofasolutionforspecialnuclearmaterialaccountancy,nuclearsafety,andprocesscontrol.Itisassumedthatthenuclidetobeanalyzedisinahomogeneoussolution(PracticeC1168).Thetransmissioncorrectionmakesthetestmethodindependentofmatrix(solutionelementalcompositionanddensity)andusefuloverseveralordersofmagnitudeofnuclideconcentrations.However,atypicalconfigurationwillnormallyspanonlytwotothreeordersofmagnitudebecauseofdetectordynamicrange.Thetestmethodassumesthatthesolution-detectorgeometryisthesameforallmeasureditems.Thiscanbeaccomplishedbyrequiringthattheliquidheightinthesidelookinggeometryexceedsthedetectorfieldofviewdefinedbythecollimator.Fortheupward-lookinggeometry,afixedsolutionfillheightmustbemaintainedandvialsofidenticalradiimustbeusedunlessthevialradiusexceedsthefieldofviewdefinedbythecollimator.Sincegamma-raysystemscanbeautomated,thetestmethodcanberapid,reliable,andnotlaborintensive.Thistestmethodmaybeapplicabletoin-lineoroff-linesituations.1.1Thistestmethodcoversthedeterminationoftheconcentrationofgamma-rayemittingspecialnuclearmaterialsdissolvedinhomogeneoussolutions.Thetestmethodcorrectsforgamma-rayattenuationbythesolutionanditscontainerbymeasurementofthetransmissionofabeamofgammaraysfromanexternalsource(Refs.(1),(2),and(3)).1.2Twosolutiongeometries,slabandcylinder,areconsidered.Thesolutioncontainerthatdeterminesthegeometrymaybeeitheraremovableorafixedgeometrycontainer.Thistestmethodislimitedtosolutioncontainershavingwallsoratopandbottomofequaltransmissionthroughwhichthegammaraysfromtheexternaltransmissioncorrectionsourcemustpass.1.3Thistestmethodistypicallyappliedtoradionuclideconcentrationsrangingfromafewmilligramsperlitretoseveralhundredgramsperlitre.Theassayrangewillbeafunctionofthespecificactivityofthenuclideofinterest,thephysicalcharacteristicsofthesolutioncontainer,countingequipmentconsiderations,assaygamma-rayenergies,solutionmatrix,gamma-raybranchingratios,andinterferences.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazards,seeSection9.
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:7P.;A4
【正文语种】: