IEC 61499-4-2005 功能块.第4部分:适应性轮廓的规则

上一篇: IEC 62061-2005 机械安全.与安全有关的电气、电子和可编程序电子控制系统的功能安全
下一篇: IEC 62264-2-2005 企业控制系统一体化.第2部分:对象模型属性

【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】:

标准名称：	钨37铼合金规范
英文名称：	Specification for tungsten-37 rhenium alloy
中标分类：	电子元器件与信息技术 >> 电子设备专用材料、零件、结构件 >> 电子技术专用材料
ICS分类：
发布日期：	2006-08-07
实施日期：	2006-12-30
首发日期：
作废日期：
出版日期：
页数：	17页

本规范规定了钨37铼合金的要求、质量保证规定、交货准备及有关规定。本规范适用于制造军用真空电子器件中电子束或离子束溅射用钨铼合金棒材或条材。

没有内容

没有内容

没有内容