附录二 英文论文模板Word格式文档下载.docx
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附录二 英文论文模板Word格式文档下载.docx
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IntegralDataBenchmarkofHENDL2.0/MGComparedwithNeutronicsShieldingExperiments*
JIANGJieqiong(蒋洁琼),XUDezheng(许德政),ZHENGShanliang(郑善良),HEZhaozhong(何兆忠),HUYanglin(胡杨林),LIJingjing(李静惊),ZOUJun(邹俊),ZENGQin(曾勤),CHENMingliang(陈明亮),WANGMinghuang(王明煌)
InstituteofPlasmaPhysics,ChineseAcademyofSciences,Hefei230031,China
SchoolofNuclearScienceandTechnology,UniversityofScienceandTechnologyofChina,Hefei230027,China
Abstract
HENDL2.0,thelatestversionofHybridEvaluatedNuclearDataLibrary,wasdevelopedbaseduponsomeevaluateddatafromFENDL2.1andENDF/B-VII.Toqualifyandvalidatetheworkinglibrary,theintegraltestfortheneutronproductiondataofHENDL2.0wasperformedwithaseriesofexistentsphericalshellbenchmarkexperiments(SuchasV,Be,Fe,Pb,Cr,Mn,Cu,Al,Si,Co,Zr,Nb,Mo,WandTi).TheseexperimentsweresimulatednumericallyusingHENDL2.0/MGandahome-developednamedVisualBUS.CalculationwithbothFENDL2.1/MGandFENDL2.1/MC,whichbasedonacontinuous-energyMonteCarloCodeMCNP/4C,weregiven.Bycomparisonsandanalysesoftheneutronleakagespectraandtheintegraltest,benchmarkresultsofneutronproductiondatawerepresentedinthiscontribution.
Keywords:
benchmarkdatalibraryHENDL,VisualBUS,shielding,fusion
PACS:
0705.H,87.52G
1.Introduction
TheHybridEvaluatedNuclearDataLibrary(HENDL)isacompilationoffusionandfissionhybrid-orienteddataevaluationswhichishome-developedandimprovedcontinuouslybytheFDSTeaminInstituteofPlasmaPhysics,ChineseAcademyofSciences(ASIPP).ItwasdevelopedwithNJOY[1]andTRANSX[2]basedupontheselectionofevaluateddatafromvariousevaluateddatafilesFENDL(IAEA),ENDF/B(USA),JENDL(Japan),JEFF(OECD/NEA),CENDL(China)andBROND(RussianFederation)[3].TheHENDLworkinglibrariescontainthecoupled175neutrongroupand42photongroupHENDL/MG(Multi-Group)librarythatcanbeusedbytheSNtransportcodes[4],continuouspoint-wiseneutrondatalibraryHENDL/MC(Monte-Carlo)thatcanbeusedbytheMonte-Carlocodes,burnuplibraryandactivationlibraryetc.Itcanbeappliedtoneutron-photoncoupledtransport/burnupcalculation,suchasfusion[5,6,7,8],fissionandfusion-fissionhybridsystems[9,10,11],toobtaindistributionsofneutron/photonfluxandotherimportantnuclearresponses.
HENDL2.0[12,13],isupdatedrecentlybaseduponthepreviousversionHENDL1.0[14,15].BesidesthecrosssectionsareupdatedonthebasisofthelatestversionevaluateddatafilesFENDL/E-2.1[16]andENDF/B-VII.0[17],thenumberofnuclidesandtypesofthenuclearreactionsarealsoextended.Thebenchmarkresultsofneutrondatawerepresentedinthiscontributioncomparingwiththeneutronleakagespectraandtheintegraltestofcurrentlyavailableneutronicsshieldingexperiments.
2.BenchmarkExperimentsandCodes
Inordertoassessthevalidityofthecrosssectionlibrarytobeappliedtothefusionreactorresearch,asetofbenchmarkcalculationisproposedinthispaper.Ahome-developedintegratedmulti-functionalneutronicscalculationandanalysiscodesystemnamedVisualBUS[14,18]isusedtoperformthesecalculationsandanalyses.V,Be,Fe,Pb,Cr,Mn,Cu,Al,Si,Co,Zr,Nb,Mo,WandTi[19],areselectedasbenchmarkednuclidesforsimulatingcalculations.ThesourcesofevaluateddataforHENDL2.0/MGandFENDL2.1/MGarepresentedinTable1.
Benchmarkexperiments[20,21]ofaseriesofnuclideshavebeendonepreviouslyfordatalibrary’sevaluationbytheInstituteofPhysics&
PowerEngineering(IPPE)ObninskandtheUniversityofOsaka(OKTAVIANfacility).Theneutronleakagespectraofthebenchmarkexperimentsaremeasuredbythetime-of-flight(TOF)method.Thesebenchmarkexperimentsareallbaseduponsphericalshellgeometrywith14MeVD-Tfusionneutronsourceatthecenteroftheinnervoidsphere.
3.ResultsandDiscussion
3.1Vanadium(IPPE)
Vanadium-basedalloysareattractiveaspotentialstructuralmaterialsforthefusionreactors[22].Measurementofneutronleakagespectrafromtwoshellsofpurevanadiumwithacentral14MeVneutronsourcewasperformedatIPPE.Theshellsthicknessesarerespectively3.5cmand10.5cmandabout0.6and1.8timesoftheMFP(theMeanFreePath)oftheneutronintheVanadium.Themeasuredneutronleakageandthecalculated-to-experimental(C/E)ratiosofintegralneutronspectraforthetwoshellsarelistedinTable2.
AsshowninTable2,thecalculationresultswithmulti-groupdata(bothHENDL2.0/MGandFENDL2.1/MG)areingoodagreementaswellasthatofcontinuous-energydata(FENDL2.1/MC)calculatedbyMCNP[23].TheresultshowsthatHENDL2.0/MGisslightlyimprovedcomparedwithHENDL1.0/MGforVanadium.
3.2Beryllium(OKTAVIAN)
Berylliumisthemostfavoredneutronmultipliercandidateforsolidbreederblanketsoffuturefusionpowerreactors[24].Aberylliumsphericalshellexperimentwithvariousthicknesseswasconductedattheintense14MeVneutronsourcefacilityOKTAVIAN.Forberylliumbenchmark,theexperimentoftheshellwiththeinner/outerradiusof5.7cm/17.35cmhasbeencalculatedwithHENDL2.0/MGusingVisualBUS/1D.ResultscalculatedusingdifferentlibrariesdataareshowninTable3.
AsshowninTable3,intheBesphericalshellexperiment,theresultswithHENDL2.0/MGrepresentsthemeasuredneutronspectraverywellalthoughthereisanoverestimationof21%aroundthepeakenergyofsource.Andtheresultsofmulti-groupdata,HENDL2.0/MGandFENDL2.1/MG,areingoodagreementbutbothhaveanunderestimationbymaximum6%(10.0<
E<
20.0MeV)fromtheBedataofFENDL2.1/MC.
3.3Iron(IPPE)
Ironsphericalshellswiththethicknessesof2.5and28.1cmwerebothirradiatedby14MeVD-TneutronsinIPPEmeasurementsforironbenchmark.ThemeasuredleakagewithspecifieduncertaintyandC/EratiosofintegralneutronspectraforthetwodifferentshellsarelistedinTable4.
Thereisthemaximumdiscrepancyof~14%(0.05MeV<
1.0MeV)forthinnershellbetweentheHEDNL2.0/MGandFENDL2.1/MGusingthesamecode.However,thedifferentoriginsoftwolibrariesofFebasedonthedifferentevaluationnucleardatalibraries(seeTable1)cancausesomedifference.
3.4Lead(IPPE)
NeutronleakagespectrummeasuredintheshellsofPbwiththeD-Tneutronsourcebeingatthecenter,hadbeenperformedpreviouslyatIPPE,Obninsk,forPbbenchmark.Theinner/outerradiioftheshellare4.5cm/12.0cm[25].
Table4revealsthatthereisaseriousunderestimationof~40%(6.5MeV<
10.5MeV)oftheleakagespectrumcomparingwiththeexperiment.HENDL2.0/MGdatahasagoodagreementwithFENDL2.1/MGdataexceptforanunderestimationof~11%intheenergyrangeof6.5-10.5MeV.Butthereisanoverestimationonlyby2%ofthemeasuredtotalflux(E>
0.1MeV)obtainedfromalltheHENDL2.0/MG,FENDL2.1/MG,andFENDL2.1/MCdata.
3.5Cr,Mn,Cu(OKTAVIAN)
TheintegralneutronspectrabenchmarksofOKTAVIANexperimentsforCr,MnandCuareanalyzedandtheresultsareshowninTable4.
ForCr,thereisagoodagreementbetweenHENDL2.0/MGdataandexperimentalneutronleakagerate.HEDNL2.0/MGdatahasanagreementwithFENDL2.1/MGresultsexceptforanunderestimationby5-20%(E<
10.0MeV)andanoverestimationby6%(10.0<
20.0MeV).Thedifferencemaybeinducedpartlybythenuclide’sdifferentdataresources(seeTable1).Butthetotalneutronflux(E>
0.1MeV)ofCrcalculatedwithHENDL2.0/MGshowsagoodagreementwithFENDL2.1/MG,andsodoestheexperiment.Inthiscase,HENDL2.0/MGisbetterthanHENDL1.0/MG.
ForMn,thereisanoverestimationofHENDL2.0/MGdataby8-18%fromthemeasuredfluxattheneutronenergylowerthan10.0MeV(Table4).ButthereisaverygoodagreementbetweentheHEDNL2.0/MGandFENDL2.1/MGresultsaswellasthecontinuous-energydata(FENDL2.1/MC).
ForCu,HENDL2.0/MGdatarepresentedthemeasuredneutronleakagespectrumofthesphericalshellexperimentverywellandbetterthanHENDL1.0/MG.ComparingwithFENDL2.1/MGdata,HENDL2.0/MGdatashowsanunderestimationby10%-33%(1.0MeV<
10.0MeV)(Table4).Thedifferencecanbepartlycausedbythenuclide’sdifferentdataresource(Table1).Butagoodagreementwiththemeasuredtotalneutronflux(E>
0.1MeV)isobtainedbetweenHENDL2.0/MGandFENDL2.1/MGofCudata.
3.6Al,Si,Co,Zr,Nb,Mo,W,Ti(OKTAVIAN)
Sphericalshellexperimentswereperformedattheintense14MeVneutronsourcefacilityOKTAVIANforAl,Si,Co,Zr,Nb,Mo,WandTi.Thesamplepilesweremadebyfillingsphericalvesselswithvarioussamplematerials.Measuredandcalculatedneutronleakagera
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