ASTM E264-2008 通过镍的放射性测量快中子反应速率的试验方法
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【英文标准名称】:StandardTestMethodforMeasuringFast-NeutronReactionRatesbyRadioactivationofNickel
【原文标准名称】:通过镍的放射性测量快中子反应速率的试验方法
【标准号】:ASTME264-2008
【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】:E10.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:activation;activationreaction;crosssection;dosimetry;fast-neutronmonitor;neutronmetrology;nickel;pressurevesselsurveillance;reactionrate;Fastneutronflux/fluence;Neutronactivationreactions;Nickel;Nickelalloys;Radioactivation--fast
【摘要】:RefertoGuideE844fortheselection,irradiation,andqualitycontrolofneutrondosimeters.RefertoPracticeE261forageneraldiscussionofthedeterminationoffast-neutronfluenceratewiththresholddetectors.Purenickelintheformoffoilorwireisreadilyavailable,andeasilyhandled.58Cohasahalf-lifeof70.86daysandemitsagammaraywithanenergyof0.8107593-MeV.Competingactivities65Ni(2.5172h)and57Ni(35.60h)areformedbythereactions64Ni(n,x03B3;)65Ni,and58Ni(n,2n)57Ni,respectively.Asecond9.04hisomer,58mCo,isformedthatdecaysto70.86-day58Co.Lossof58Coand58mCobythermal-neutronburnoutwilloccurinenvironments,havingthermalfluenceratesof3x00D7;1012cmx2212;2x00B7;sx2212;1andabove.Burnoutcorrectionfactors,R,areplottedasafunctionoftimeforseveralthermalfluxesinFig.1.TabulatedvaluesforacontinuousirradiationtimeareprovidedinHogg,etal.Fig.2showsaplotofcrosssectionversusenergyforthefast-neutronreaction58Ni(n,p)58Co.Thisfigureisforillustrativepurposesonlytoindicatetherangeofresponseofthe58Ni(n,p)reaction.RefertoGuideE1018fordescriptionsofrecommendedtabulateddosimetrycrosssections.Note18212;ThedataistakenfromtheEvaluatedNuclearDataFile,ENDF/B-VI,ratherthanthelaterENDF/B-VII.ThisisinaccordancewithE1018,section6.1,sincethelaterENDF/B-VIIdatafilesdonotincludecovarianceinformation.FormoredetailsseeSectionHofreference8.FIG.258Ni(n,p)58CoCrossSection1.1Thistestmethodcoversproceduresformeasuringreactionratesbytheactivationreaction58Ni(n,p)58Co.1.2Thisactivationreactionisusefulformeasuringneutronswithenergiesaboveapproximately2.1MeVandforirradiationtimesuptoabout200daysintheabsenceofhighthermalneutronfluencerates(forlongerirradiations,seePracticeE261).1.3Withsuitabletechniquesfission-neutronfluenceratesdensitiesabove107cmx2212;2x00B7;sx2212;1canbedetermined.1.4Detailedproceduresforotherfast-neutrondetectorsarereferencedinPracticeE261.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note8212;Theburnupcorrectionswerecomputedusingeffectiveburn-upcrosssectionsof1650bfor58Co(n,x03B3;)and1.4E5bfor58mCo(n,......
【中国标准分类号】:F74
【国际标准分类号】:17_240;27_120_30
【页数】:3P.;A4
【正文语种】:英语
【原文标准名称】:通过镍的放射性测量快中子反应速率的试验方法
【标准号】:ASTME264-2008
【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】:E10.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:activation;activationreaction;crosssection;dosimetry;fast-neutronmonitor;neutronmetrology;nickel;pressurevesselsurveillance;reactionrate;Fastneutronflux/fluence;Neutronactivationreactions;Nickel;Nickelalloys;Radioactivation--fast
【摘要】:RefertoGuideE844fortheselection,irradiation,andqualitycontrolofneutrondosimeters.RefertoPracticeE261forageneraldiscussionofthedeterminationoffast-neutronfluenceratewiththresholddetectors.Purenickelintheformoffoilorwireisreadilyavailable,andeasilyhandled.58Cohasahalf-lifeof70.86daysandemitsagammaraywithanenergyof0.8107593-MeV.Competingactivities65Ni(2.5172h)and57Ni(35.60h)areformedbythereactions64Ni(n,x03B3;)65Ni,and58Ni(n,2n)57Ni,respectively.Asecond9.04hisomer,58mCo,isformedthatdecaysto70.86-day58Co.Lossof58Coand58mCobythermal-neutronburnoutwilloccurinenvironments,havingthermalfluenceratesof3x00D7;1012cmx2212;2x00B7;sx2212;1andabove.Burnoutcorrectionfactors,R,areplottedasafunctionoftimeforseveralthermalfluxesinFig.1.TabulatedvaluesforacontinuousirradiationtimeareprovidedinHogg,etal.Fig.2showsaplotofcrosssectionversusenergyforthefast-neutronreaction58Ni(n,p)58Co.Thisfigureisforillustrativepurposesonlytoindicatetherangeofresponseofthe58Ni(n,p)reaction.RefertoGuideE1018fordescriptionsofrecommendedtabulateddosimetrycrosssections.Note18212;ThedataistakenfromtheEvaluatedNuclearDataFile,ENDF/B-VI,ratherthanthelaterENDF/B-VII.ThisisinaccordancewithE1018,section6.1,sincethelaterENDF/B-VIIdatafilesdonotincludecovarianceinformation.FormoredetailsseeSectionHofreference8.FIG.258Ni(n,p)58CoCrossSection1.1Thistestmethodcoversproceduresformeasuringreactionratesbytheactivationreaction58Ni(n,p)58Co.1.2Thisactivationreactionisusefulformeasuringneutronswithenergiesaboveapproximately2.1MeVandforirradiationtimesuptoabout200daysintheabsenceofhighthermalneutronfluencerates(forlongerirradiations,seePracticeE261).1.3Withsuitabletechniquesfission-neutronfluenceratesdensitiesabove107cmx2212;2x00B7;sx2212;1canbedetermined.1.4Detailedproceduresforotherfast-neutrondetectorsarereferencedinPracticeE261.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note8212;Theburnupcorrectionswerecomputedusingeffectiveburn-upcrosssectionsof1650bfor58Co(n,x03B3;)and1.4E5bfor58mCo(n,......
【中国标准分类号】:F74
【国际标准分类号】:17_240;27_120_30
【页数】:3P.;A4
【正文语种】:英语
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