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ASTM C1539-2008 液体闪烁计数测定六氟化铀中锝99的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminationofTechnetium-99inUraniumHexafluoridebyLiquidScintillationCounting
【原文标准名称】:液体闪烁计数测定六氟化铀中锝99的标准试验方法
【标准号】:ASTMC1539-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:scintillationcounter;technetium-99;uraniumhexafluoride;Liquidscintillationcounting;Technetium-99;Uraniumhexafluoride(UF6)
【摘要】:Uraniumhexafluorideisabasicmaterialusedtopreparenuclearreactorfuel.Tobesuitableforthispurpose,thematerialmustmeetthecriteriafortechnetiumcomposition.ThistestmethodisdesignedtodeterminewhetherthematerialmeetstherequirementsdescribedinSpecificationsC787andC996.Usingthespecifiedinstrumentationandparameters,thismethodhasalowerdetectionlimitof0.0004x03BC;gTc/gU.Note18212;Differentinstrumentationorparametersmayprovidevaryingdetectionlimits,ascalculatedin11.4.1.1Thistestmethodisaquantitativemethodusedtodeterminetechnetium-99(99Tc)inuraniumhexafluoride(UF6)byliquidscintillationcounting.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:F46
【国际标准分类号】:71_040_01
【页数】:4P.;A4
【正文语种】:英语


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【英文标准名称】:MeasuringtheCureBehaviorofThermosettingResinsUsingDynamicMechanicalProperties(08.03)
【原文标准名称】:采用动态机械特性测量热固树脂弯曲特性
【标准号】:ANSI/ASTMD4473-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:2001-09-25
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:测量;塑料
【英文主题词】:measurement;plastics
【摘要】:Thispracticecoverstheuseofdynamic-mechanical-oscillationinstrumentationforgatheringandreportingthethermaladvancementofcurebehaviorofthermosettingresin.Itmaybeusedfordeterminingthecurepropertiesofunsupportedresinsandresinssupportedonsubstratesandsubjectedtovariousoscillatorydeformations.Thesedeformationsmaybeinshearorthedynamiccompressionofsupportedresinsusingadynamicmechanicalinstrument.Thispracticeisintendedtoprovidemeansfordeterminingthecurebehaviorofsupportedandunsupportedthermosettingresinsoverarangeoftemperaturesbyfreevibrationandresonantandnonresonantforced-vibrationtechniques,inaccordancewithPracticeD4065.Plotsofmodulus,curebehavior,tandelta,anddampingindexasafunctionoftime/temperatureareindicativeofthethermaladvancementorcurecharacteristicsofaresin.Thispracticeisvalidforawiderangeoffrequencies,typicallyfrom0.01to100Hz.However,itisstronglyrecommendedthatlow-frequencytestconditions,generallybelow1.5Hz,willgeneratemoredefinitivecure-behaviorinformation.Thispracticeisintendedforresin/substratecompositesthathaveanuncuredeffectiveelasticmodulusinsheargreaterthan0.5MPa.Apparentdiscrepanciesmayariseinresultsobtainedunderdifferingexperimentalconditions.Theseapparentdifferencesfromresultsobservedinanotherstudycanusuallybereconciled,withoutchangingtheobserveddata,byreportinginfull(asdescribedinthispractice)theconditionsunderwhichthedatawereobtained.Duetopossibleinstrumentationcompliance,especiallyinthecompressivemode,thedatageneratedmayindicaterelativeandnotnecessarilyabsolutepropertyvalues.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninNote5.Note1-ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_10
【页数】:
【正文语种】:英语


【英文标准名称】:Plasticspipingsystems-Unplasticizedpoly(vinylchloride)(PVC-U)pipes-Testmethodfortheresistancetodichloromethaneataspecifiedtemperature(DCMT);GermanversionEN580:2003
【原文标准名称】:塑料管道系统.未增塑聚氯乙烯管.规定温度下抗二氯四甲烷的检验方法
【标准号】:DINEN580-2003
【标准状态】:现行
【国别】:德国
【发布日期】:2003-08
【实施或试行日期】:
【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】:管;检验;温度;聚氯乙烯;胶凝;耐化学性;不增塑的;数学计算;二氯甲烷;氯甲烷;均匀性;规范(验收);塑料;材料;机械性能;管道;试验;PVC-U未增塑聚氯乙烯;质量控制;储存;塑料管;耐力;未增塑聚氯乙烯
【英文主题词】:
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:23_040_20
【页数】:10P;A4
【正文语种】:德语