ASTM E944-2008 反应堆监测时中子光谱调节法的应用的标准指南,E706(IIA)
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【英文标准名称】:StandardGuideforApplicationofNeutronSpectrumAdjustmentMethodsinReactorSurveillance,E706(IIA)
【原文标准名称】:反应堆监测时中子光谱调节法的应用的标准指南,E706(IIA)
【标准号】:ASTME944-2008
【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】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:dosimetry;exposureparameters;irradiationdamage;leastsquares;neutron;reactorsurveillance;spectrumadjustment;Adjustments;Dosimetry;Energydeposition--neutronradiation;Fastneutronflux/fluence;Fluence;Irradiance/irradiation--nucleara
【摘要】:Adjustmentmethodsprovideameansforcombiningtheresultsofneutrontransportcalculationswithneutrondosimetrymeasurements(seeTestMethodE1005andNUREG/CR-5049)inordertoobtainoptimalestimatesforneutrondamageexposureparameterswithassigneduncertainties.Theinclusionofmeasurementsreducestheuncertaintiesfortheseparametervaluesandprovidesatestfortheconsistencybetweenmeasurementsandcalculationsandbetweendifferentmeasurements(see3.3.3).Thisdoesnot,however,implythatthestandardsformeasurementsandcalculationsoftheinputdatacanbelowered;theresultsofanyadjustmentprocedurecanbeonlyasreliableasaretheinputdata.InputDataandDefinitions:Thesymbolsintroducedinthissectionwillbeusedthroughouttheguide.Dosimetrymeasurementsaregivenasasetofreactionrates(orequivalent)denotedbythefollowingsymbols:Thesedataare,atpresent,obtainedprimarilyfromradiometricdosimeters,butothertypesofsensorsmaybeincluded(see4.1).Theneutronspectrum(seeTerminologyE170)atthedosimeterlocation,fluenceorfluenceratex03A6;(E)asafunctionofneutronenergyE,isobtainedbyappropriateneutronicscalculations(neutrontransportusingthemethodsofdiscreteordinatesorMonteCarlo,seeGuideE482).Theresultsofthecalculationarecustomarilygivenintheformofkgroupfluencesorfluencerates.where:EjandEj+1arethelowerandupperboundsforthej-thenergygroup,respectively.Thereactioncrosssectionsofthedosimetrysensorsareobtainedfromanevaluatedcrosssectionfile.Thecrosssectionforthei-threactionasafunctionofenergyEwillbedenotedbythefollowing:Usedinconnectionwiththegroupfluences,Eq2,arethecalculatedgroup-averagedcrosssectionsx03C3;ij.Thesevaluesaredefinedthroughthefollowingequation:Uncertaintyinformationintheformofvariancesandcovariancesmustbeprovidedforallinputdata.Appropriatecorrectionsmustbemadeiftheuncertaintiesareduetobiasproducingeffects(forexample,effectsofphotoreactions).SummaryoftheProcedures:Anadjustmentalgorithmmodifiesthesetofinputdataasdefinedin3.2inthefollowingmanner(adjustedquantitiesareindicatedbyatilde,forexample,?/span>i):orforgroupfluencerates
【原文标准名称】:反应堆监测时中子光谱调节法的应用的标准指南,E706(IIA)
【标准号】:ASTME944-2008
【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】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:dosimetry;exposureparameters;irradiationdamage;leastsquares;neutron;reactorsurveillance;spectrumadjustment;Adjustments;Dosimetry;Energydeposition--neutronradiation;Fastneutronflux/fluence;Fluence;Irradiance/irradiation--nucleara
【摘要】:Adjustmentmethodsprovideameansforcombiningtheresultsofneutrontransportcalculationswithneutrondosimetrymeasurements(seeTestMethodE1005andNUREG/CR-5049)inordertoobtainoptimalestimatesforneutrondamageexposureparameterswithassigneduncertainties.Theinclusionofmeasurementsreducestheuncertaintiesfortheseparametervaluesandprovidesatestfortheconsistencybetweenmeasurementsandcalculationsandbetweendifferentmeasurements(see3.3.3).Thisdoesnot,however,implythatthestandardsformeasurementsandcalculationsoftheinputdatacanbelowered;theresultsofanyadjustmentprocedurecanbeonlyasreliableasaretheinputdata.InputDataandDefinitions:Thesymbolsintroducedinthissectionwillbeusedthroughouttheguide.Dosimetrymeasurementsaregivenasasetofreactionrates(orequivalent)denotedbythefollowingsymbols:Thesedataare,atpresent,obtainedprimarilyfromradiometricdosimeters,butothertypesofsensorsmaybeincluded(see4.1).Theneutronspectrum(seeTerminologyE170)atthedosimeterlocation,fluenceorfluenceratex03A6;(E)asafunctionofneutronenergyE,isobtainedbyappropriateneutronicscalculations(neutrontransportusingthemethodsofdiscreteordinatesorMonteCarlo,seeGuideE482).Theresultsofthecalculationarecustomarilygivenintheformofkgroupfluencesorfluencerates.where:EjandEj+1arethelowerandupperboundsforthej-thenergygroup,respectively.Thereactioncrosssectionsofthedosimetrysensorsareobtainedfromanevaluatedcrosssectionfile.Thecrosssectionforthei-threactionasafunctionofenergyEwillbedenotedbythefollowing:Usedinconnectionwiththegroupfluences,Eq2,arethecalculatedgroup-averagedcrosssectionsx03C3;ij.Thesevaluesaredefinedthroughthefollowingequation:Uncertaintyinformationintheformofvariancesandcovariancesmustbeprovidedforallinputdata.Appropriatecorrectionsmustbemadeiftheuncertaintiesareduetobiasproducingeffects(forexample,effectsofphotoreactions).SummaryoftheProcedures:Anadjustmentalgorithmmodifiesthesetofinputdataasdefinedin3.2inthefollowingmanner(adjustedquantitiesareindicatedbyatilde,forexample,?/span>i):orforgroupfluencerates
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