MIL-STD-15/2
时间:2024-05-20 21:01:32 来源: 标准资料网 作者：标准资料网 阅读：8033
MIL-STD-15/2, MILITARY STANDARD: ELECTRICAL WIRING EQUIPMENT SYMBOLS FOR SHIPS' PLANS - PART 2 (30 OCT 1961) [NO S/S DOCUMENT]., The purpose of this standard is toestablish a uniform system of graphic symbols for useon drawings and plans of shipboard (marine) electricalinstallations. Standard electrical symbol designatorsshown in the standard Electrical Symbol List NAVSHIPS 250-560-3 provide a means of correlatinggraphical symbols, when shown on drawings, withpart lists and descriptions of and instructions concerningthe wiring.
【英文标准名称】:StandardTestMethodforNon-DestructiveAssayofNuclearMaterialinWastebyPassiveandActiveNeutronCountingUsingaDifferentialDie-AwaySystem
【原文标准名称】:用微分衰减系统钝化-活化中子计数法对废物中的核物质进行无损化验的标准试验方法
【标准号】:ASTMC1493-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:C26.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:微分衰减系统;中子计数;核废物和废弃材料;无源中子计数
【英文主题词】:Differentialdie-awaysystem;Neutroncounting;Nuclearscrapandwastematerials;Passiveneutroncounting
【摘要】:Thistestmethodisusefulforquantifyingfissile(forexample,233U,235U,239Puand241Pu)andspontaneously-fissioningnuclei(forexample,238Pu,240Pu,242Pu,244Cm,248Cm,and252Cf)inwasteandscrapdrums.Totalelementalmassoftheradioactivematerialscanbecalculatediftherelativeabundancesofeachradionuclideareknown.Typically,thistestmethodisusedtomeasureonefissileisotope(forexample,235Uor239Pu).Thistestmethodcanbeusedtosegregatelowlevelandtransuranicwasteatthe100nCi/gconcentrationlevelcurrentlyrequiredtomeettheDOEWasteIsolationPilotPlant(WIPP)wasteacceptancecriterion(5,8,9).Thistestmethodcanbeusedforwastecharacterizationtodemonstratecompliancewiththeradioactivitylevelsspecifiedinwaste,disposal,andenvironmentalregulations(SeeNRCregulatoryguides,DOEOrder435.1,10CFRPart71,40CFRPart191,andDOE/WIPP-069).Intheactivemode,theDDTsystemcanmeasurethe235Ucontentintherangefromx003C;0.02to>100gandthe239Pucontent,nominallybetweenx003C;0.01and>20g.Inthepassivemode,theDDTsystemiscapableofassayingspontaneously-fissioningnuclei,overanominalrangefrom0.05to15gof240Pu,orequivalent(5,10,11,12,13).Thistestmethodshouldbeusedinconjunctionwithawastemanagementplanthatsegregatesthecontentsofassayitemsintomaterialcategoriesaccordingtosomeorallofthefollowingcriteria:bulkdensityofthewaste,chemicalformsoftheplutoniumoruraniumandmatrix,(x03B1;,n)neutronintensity,hydrogen(moderator)andabsorbercontent,thicknessoffissilemass(es),andtheassayitemcontainersizeandcomposition.Eachmatrixmayrequireadifferentsetofcalibrationstandardsandmayhavedifferentmasscalibrationlimits.Theeffectonthequalityoftheassay(thatis,minimizingprecisionandbias)cansignificantlydependonthedegreeofadherencetothiswastemanagementplan.Thebiasofthemeasurementresultsisrelatedtothefillheight,thehomogeneityandcompositionofthematrix,thequantityanddistributionofthenuclearmaterial,andtheitemsize.Theprecisionofthemeasurementresultsisrelatedtothequantityofthenuclearmaterial,thebackground,andthecounttimeofthemeasurement.Forbothmatrix-specificandwide-rangecalibrations,thistestmethodassumesthecalibrationmaterialmatchestheitemstobemeasuredwithrespecttohomogeneityandcompositionofthematrix,theneutronmoderatorandabsorbercontent,andthequantity,distribution,andformofnuclearmaterial,totheextenttheyaffectthemeasurement.Thealgorithmsforthistestmethodassumehomogeneity.Heterogeneityinthedistributionofnuclearmaterial,neutronmoderators,andneutronabsorbershasthepotentialtocausebiasedresults(14).Thistestmethodassumesthatthedistributionofthecontributingradioisotopesisuniformthroughoutthecontainerandthatlumpsofnuclearmaterialarenotpresent.ReliableresultsfromtheapplicationofthistestmethodrequirewastetobepackagedsotheconditionsofSection5.5canbemet.Insomecases,site-specificrequirementswilldictatethepackagingrequirementswithpossibledetrimentaleffectstothemeasurementresults.Boththeactivemodeandthepassivemodeprovideassayvaluesforplutonium.Duringthecalibrationprocess,theoperatorshoulddeterminetheapplicablemassrangesforbothmodesofoperation.1.1Thistestmethodcoversasy......
【中国标准分类号】:F40
【国际标准分类号】:27_120_30
【页数】:13P.;A4
【正文语种】:
【英文标准名称】:FixedRadioSystems-Multipointequipmentandantennas-Genericharmonizedstandardformultipointdigitalfixedradiosystemsandantennascoveringtheessentialrequirementsunderarticle3.2oftheDirective1999/5/EC(EndorsementoftheEnglishversi
【原文标准名称】:固定无线电系统.多点设备和天线.包括指令1999/5/EC的3.2条款中基本要求的多点数字固定无线电系统和天线的通用协调的标准
【标准号】:EN301753-2003
【标准状态】:现行
【国别】:
【发布日期】:2004-06
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:电信;电气工程;分类;发射台;多点连接;无线电装置;远程通信;数字的;复接;无线电天线;无线电工程;传播学;数字无线电链接;定向天线;中继无线电;传输方法;无线电电路;无线电通信链路;接收台;传输技术;多路复用;天线
【英文主题词】:Antennas;Classification;Communication;Digital;Digitalradiolinks;Directionalaerials;Electricalengineering;Multiplex;Multiplexing;Multipointconnections;Radioantennas;Radiocircuits;Radioengineering;Radiolinks;Radiosystems;Receivingstation;Relayradio;Telecommunication;Telecommunications;Transmissionmethods;Transmissiontechnique;Transmittingstations
【摘要】:
【中国标准分类号】:M36
【国际标准分类号】:33_040_20;33_060_30;33_120_40
【页数】:2P.;A4
【正文语种】:英语