【英文标准名称】:StandardTestMethodforDeterminingtheContentofCesium-137inIrradiatedNuclearFuelsbyHigh-ResolutionGamma-RaySpectralAnalysis
【原文标准名称】:用高分辨率γ射线光谱分析法对照射过的核燃料中的铯137的标准试验方法
【标准号】:ASTME692-2000
【标准状态】:现行
【国别】:
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:E10.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:铯;试验;光谱分析;燃料;核能
【英文主题词】:Cesium-137;irradiateduraniumandplutoniumnuclearfuel,byhigh-resolution;gamma-rayspectralanalysis,test,;Gammaradiation;cesium-137inirradiateduranium/plutoniumnuclearfuels,by;high-resolutiongamma-rayspectralanalysis,test,;High-resolutiongamma-rayspectralanalysis;cesium-137content,ofirradiatedplutoniumanduraniumnuclearfuel,;test,;Nuclearfuels(reactor);cesium-137inirradiatednuclearfuels,byhigh-resolutiongamma-ray;spectralanalysis,test,;Plutonium;cesium-137content(ofirradiatednuclearfuel),byhigh-resolution;gamma-rayspectralanalysis,test,;Uranium;cesium-137content,byhigh-resolutiongamma-rayspectralanalysis,;test;
【摘要】:Thistestmethodusesahigh-resolutiongamma-rayspectrometerasabasisformeasuringthegamma-rayemissionrateof137Cs-137mBainadilutenitricacidsolutioncontaining10mg/Lofcesiumcarrier.Nochemicalseparationofthecesiumfromthedissolved-fuelsolutionisrequired.Theprincipalstepsconsistofdilutingaweighedaliquotofthedissolved-fuelsolutionwithaknownmassof1Mnitricacid(HNO3)andmeasuringthe662keVgamma-raycountratefromthesample,thenmeasuringthe662keVgamma-raycountratefromastandardsourcethathasthesamephysicalformandcountinggeometryasthesample.Theamountoffuelsamplerequiredfortheanalysisissmall.Forasamplecontaining1mgoffuelirradiatedtooneatompercentfission,anetcountrateofapproximately103countspersecondwillbeobservedforacountinggeometrythatyieldsafull-energypeakefficiencyfractionof1x00D7;10-3.Theadvantageofthissmallamountofsampleisthattheconcentrationoffuelmaterialcanbekeptatlevelswellbelow1g/L,whichresultsinnegligibleself-absorptioninthesamplealiquotandasmallradiationhazardtotheanalyst.1.1ThistestmethodcoversthedeterminationofthenumberofatomsofCsinaqueoussolutionsofirradiateduraniumandplutoniumnuclearfuel.Tominimizeinterferencefromshort-livedfissionproducts,thefuelshoulddecay4monthsormorepriortothegamma-rayemission-ratemeasurement.1.2Whencombinedwithamethodfordeterminingtheinitialnumberoffissileatomsinthefuel,theresultsofthisanalysisallowsatompercentfission(burnup)tobecalculated.Thedeterminationofatompercentfission,uraniumandplutoniumconcentrations,andisotopicabundancesarecoveredinTestMethodsE267andE321.1.3Csisnotsuitableasafissionmonitorforsamplesthatmayhavelostcesiumduringreactoroperation.Forexample,alargetemperaturegradientenhancesCsmigrationfromthefuelregiontocoolerregionssuchastheradialfuel-cladgap,ortoalesserextent,towardstheaxialfuelend.1.4TheCsdistributionmaybeascertainedbyanaxialgamma-rayscanofthefuelelementtobeassayed.Inamixed-oxidefuel,comparisonoftheCsdistributionwiththedistributionofnonmigratingfission-productnuclidessuchasZrorCewouldindicatetherelativedegreeofCsmigration.AnonuniformCsdistributionshouldalerttheanalysttothepotentiallossofthefissionnuclide.1.5Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:3P.;A4
【正文语种】:
基本信息
| 标准名称： | 天目湖白茶 |
| 发布部门： | 江苏省质量技术监督局 |
| 发布日期： | 2008-10-30 |
| 实施日期： | 2008-12-30 |
| 首发日期： | |
| 作废日期： | |
| 主管部门： | 江苏省质量技术监督局 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2008-12-30 |
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