【英文标准名称】:Equipmentreliability-Reliabilityassessmentmethods(IEC62308:2006);GermanversionEN62308:2006
【原文标准名称】:设备可靠性.可靠性评估方法
【标准号】:DINEN62308-2007
【标准状态】:现行
【国别】:德国
【发布日期】:2007-07
【实施或试行日期】:2007-07-01
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;检查表;缺陷与故障;定义;可靠性管理;耐久性;电气工程;电工产品;误差分析;评估;故障;损坏率;失效率;仪器;寿命周期;寿命;手册;质量;质量评估;质量改进;质量管理;可靠性相关程序;可靠性;可靠性分析;可靠性改进;相似性;统计学;应力
【英文主题词】:
【摘要】:
【中国标准分类号】:K04
【国际标准分类号】:29_020
【页数】:54P;A4
【正文语种】:德语


【英文标准名称】:StandardGuideforDeterminationofNeptunium-237inSoil
【原文标准名称】:测定土壤中镎237的标准指南
【标准号】:ASTMC1475-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:C26.05
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:土壤;镎;测定;含量测定;放射性核素;土壤分析
【英文主题词】:alphaspectroscopy;americium243;betaconuting;extractionchromatography;gamma-rayspectroscopy;neptunium-239;neptunium-237determination;soilanalysis
【摘要】:Asoilsamplingandanalysisprogramprovidesadirectmeansofdeterminingtheconcentrationanddistributionofradionuclidesinsoil.Thepresenceandextentofneptunium-237isofparticularinterestbecauseitisoneofthemoremobiletransuranicsintermsofmigrationandplantuptake.Sincesoilisanintegratorandareservoironlong-livedradionuclides,andservesasanintermediaryinseveralpathwaysofpotentialimportancetohumans,knowledgeoftheconcentrationofneptunium-237insoilisessential.1.1Thisguidecoversthedeterminationofneptunium-237insoilbymeansofradiochemicalseparationsandalphaspectrometry.Thisguideprovidesoptionsintheselectionofsamplepreparation,separation,andmeasurement.Althoughneptunium-237isnotacomponentofglobalfallout,itisaproductofproductionreactorsandspentfuelprocessing.ThisguideisdesignedforanalysisoftengramsofsoilpreviouslycollectedandtreatedinaccordancewithPracticesC998andC999.Larger-sizesamplesofenvironmentalsoilmayalsobeanalyzed,aslongastheconcentrationsofinterferencessuchasuraniumandthoriumareatornearenvironmentalconcentrations.Dependingonthechoiceofasampledissolutionmethod,allchemicalformsofneptuniummaynotbecompletelysolubilized.Thisguideshouldallowthedeterminationofneptunium-237concentrationsfromsubbecquerelpergramlevelstoapplicablestandardsdependingoncounttime,samplesize,detectorefficiency,background,andtraceryield.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection8.
【中国标准分类号】:Z33
【国际标准分类号】:13_080_10
【页数】:4P.;A4
【正文语种】: