【英文标准名称】:REFERENCEMARKINGOFLEFT-HANDTHREADEDPARTS.
【原文标准名称】:左旋螺纹零件的基准标志
【标准号】:NFE27-004-1973
【标准状态】:作废
【国别】:法国
【发布日期】:1973-05
【实施或试行日期】:1973-05-10
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:槽头螺钉;槽头紧固件;凹头螺钉;凹头紧固件;左螺纹;圆头紧固件;沉头螺钉;凸头螺钉;六角头螺钉;六角头紧固件;埋头紧固件;作标记;螺钉
【英文主题词】:
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:
【页数】:1P;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforUraniuminPresenceofPlutoniumbyIron(II)ReductioninPhosphoricAcidFollowedbyChromium(VI)Titration
【原文标准名称】:在有钚存在的情况下经铬(VI)滴定后用磷酸中铁(II)量减少法测定铀的试验方法
【标准号】:ASTMC1204-2002(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:chromiumtitration;DaviesandGraytitration;mixedoxide(MOX);modifiedDaviesandGraytitration;uranium;uraniuminplutonium;Titration;Uranium;Uraniuminplutonium;Chromiumtitrationofuranium;DaviesandGraytitration;Mixedoxides(MOX)
【摘要】:Factorsgoverningselectionofamethodforthedeterminationofuraniumincludeavailablequantityofsample,samplepurity,desiredlevelofreliability,andequipmentavailability.Thistestmethodissuitableforsamplesbetween20to300mgofuranium,isapplicabletofastbreederreactor(FBR)-mixedoxideshavingauraniumtoplutoniumratioof2.5andgreater,istoleranttowardsmostmetallicimpurityelementsusuallyspecifiedforFBR-mixedoxidefuel,andusesnospecialequipment.Theruggednessofthetitrationmethodhasbeenstudiedforboththevolumetric(6)andtheweight(7)titrationofuraniumwithdichromate.1.1Thistestmethodcoversunirradiateduranium-plutoniummixedoxidehavingauraniumtoplutoniumratioof2.5andgreater.Thepresenceoflargeramountsofplutonium(Pu)thatgiveloweruraniumtoplutoniumratiosmaygivelowanalysisresultsforuranium(U)(1),iftheamountofplutoniumtogetherwiththeuraniumissufficienttoslowthereductionstepandpreventcompletereductionoftheuraniumintheallottedtime.Useofthistestmethodforloweruraniumtoplutoniumratiosmaybepossible,especiallywhen20to50mgquantitiesofuraniumarebeingtitratedratherthanthe100to300mginthestudycitedinRef(1).Confirmationofthatinformationshouldbeobtainedbeforethistestmethodisusedforratiosofuraniumtoplutoniumlessthan2.5.1.2TheamountofuraniumdeterminedinthedatapresentedinSection12was20to50mg.However,thistestmethod,asstated,containsironinexcessofthatneededtoreducethecombinedquantitiesofuraniumandplutoniuminasolutioncontaining300mgofuraniumwithuraniumtoplutoniumratiosgreaterthanorequalto2.5.Solutionscontainingupto300mguraniumwithuraniumtoplutoniumratiosgreaterthanorequalto2.5havebeenanalyzed(1)usingthereagentvolumesandconditionsasdescribedinSection10.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:9P.;A4
【正文语种】:英语