MIL-N-8984 (AMENDMENT 1)
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MIL-N-8984 (AMENDMENT 1), MILITARY SPECIFICATION: NUT, SELF-LOCKING, STEEL, 260 KSI FTU, 450 DEG. F (28 JAN 1972) [S/S BY NASM8984]., This amendment forms a part of MIL-N-8984, dated 28 JANUARY 1972, and is approved for use by all Departments and Agencies of the Department of Defense.
【英文标准名称】:NickelStripforElectronTubes
【原文标准名称】:电子管镍带
【标准号】:ASTMF3-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:管;带材;电子工程;电子管;镍
【英文主题词】:nickel;electrontubes;electronicengineering;pipes;strips
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:77_120_40
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforAnalysisofUrineforUranium-235andUranium-238IsotopesbyInductivelyCoupledPlasma-MassSpectrometry
【原文标准名称】:电感耦合等离子体-质谱分析法对尿进行铀-235和铀-238分析的标准试验方法
【标准号】:ASTMC1379-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:bioassay;inductivelycoupledplasma-massspectrometry;totaluraniumconcentration;urineanalysis;ICP-MS(inductively-coupledplasma-massspectrometry);Massspectrometry--nuclearmaterials/applications;Totaluraniumconcentration;Uraniumconcentrat
【摘要】:DOEOrder5480.11andANSIN13.30requirethatinternaldoseassessmentsbemadeaspartofthebioassayprogramfornuclearfacilityworkers.Forindirectbioassayofuraniumworkers,theuraniumisotopesmustbemeasuredalongwiththetotaluraniuminurinesamples.TheRMDAforeachuraniumisotopeis0.1pCi/L.Thismethodisapplicableformeasuring235Uand238UattheRMDA.Becauseofextremelylowmassconcentration(becauseofthehighspecificactivity),234Ucannotbemeasuredwithoutadditionalsamplepreconcentration.Note28212;Columnchromatographyseparationsandconcentrationof234Uusingmanualorflow-injectionpreconcentrationfollowedbyICP-MSisotopicdeterminationaredescribedinTestMethodsC1310andC1345.Thesemethodsfocusonenvironmentalsoilsampleanalysis,butwithsomedevelopment,maybeapplicabletodigestedurinesamples.The234Uconcentrationcanbecalculatedbasedonanenrichmentgradientforworkersinuraniumenrichmentplants,andinternaldoseassessmentscanbemade.Note38212;UseofhighresolutionICP-MSmayalsobeusedtoobtainlowerdetectionlimits.1.1Thistestmethodcoversthedeterminationoftheconcentrationofuranium-235anduranium-238inurineusingInductivelyCoupledPlasma-MassSpectrometry.Thistestmethodcanbeusedtosupporturaniumfacilitybioassayprograms.1.2Thismethoddetectionlimitsfor235Uand238Uare6ng/L.TomeettherequirementsofANSIN13.30,theminimumdetectableactivity(MDA)ofeachradionuclidemeasuredmustbeatleast0.1pCi/L(0.0037Bq/L).TheMDAtranslatesto47ng/Lfor235Uand300ng/Lfor238U.Uraniumx2013;234cannotbedeterminedattheMDAwiththistestmethodbecauseofitslowmassconcentrationlevelequivalentto0.1pCi/L.1.3Thedigestionandanionseparationofurinemaynotbenecessarywhenuraniumconcentrationsofmorethan100ng/Larepresent.1.4Units8212;ThevaluesstatedinpicoCurieperliterunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;Warning:TheICP-MSisasourceofintenseultravioletradiationfromtheradiofrequencyinducedplasma.ProtectionfromradiofrequencyradiationandUVradiationisprovidedbytheinstrumentundernormaloperation.
【中国标准分类号】:F46
【国际标准分类号】:11_100
【页数】:5P.;A4
【正文语种】:英语
