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首页 MCNP5_manual_VOL_III

MCNP5_manual_VOL_III.pdf

MCNP5_manual_VOL_III

liwenguo
2011-04-19 0人阅读 举报 0 0 暂无简介

简介:本文档为《MCNP5_manual_VOL_IIIpdf》,可适用于工程科技领域

iTitle:MCNPAGeneralMonteCarloNParticleTransportCode,VersionVolumeIII:Developer’sGuideAuthors:XMonteCarloTeamLACPLosAlamosControlledPublicationdistributionislimitedLosAlamosNationalLaboratory,anaffirmativeactionequalopportunityemployer,isoperatedbytheUniversityofCaliforniafortheUSDepartmentofEnergyundercontractWENGByacceptanceofthisarticle,thepublisherrecognizesthattheUSGovernmentretainsanonexclusive,royaltyfreelicensetopublishorreproducethepublishedformofthiscontribution,ortoallowotherstodoso,forUSGovernmentpurposesLosAlamosNationalLaboratoryrequeststhatthepublisheridentifythisarticleasworkperformedundertheauspicesoftheUSDepartmentofEnergyLosAlamosNationalLaboratorystronglysupportsacademicfreedomandaresearcher’srighttopublishasaninstitution,however,theLaboratorydoesnotendorsetheviewpointofapublicationorguaranteeitstechnicalcorrectnessFormd()DISTRIBUTIONLIMITATIONSTATEMENTFurtherdisseminationauthorizedtoUSGovernmentagenciesandtheircontractorsotherrequestsshallbeapprovedbytheXMonteCarloTeam,ORNLRSICC,orbyhigherDOEprogrammaticauthorityApril,iiMCNP,MCNP,and“MCNPVersion”aretrademarksoftheRegentsoftheUniversityofCalifornia,LosAlamosNationalLaboratoryCOPYRIGHTNOTICEDISCLAIMERThismaterialwaspreparedbytheUniversityofCalifornia(University)underContractWENGwiththeUSDepartmentofEnergy(DOE)AllrightsinthematerialarereservedbyDOEonbehalfoftheGovernmentandtheUniversitypursuanttothecontractYouareauthorizedtousethematerialforGovernmentpurposesbutitisnottobereleasedordistributedtothepublicNEITHERTHEUNITEDSTATESNORTHEUNITEDSTATESDEPARTMENTOFENERGY,NORTHEUNIVERSITYOFCALIFORNIA,NORANYOFTHEIREMPLOYEES,MAKESANYWARRANTY,EXPRESSORIMPLIED,ORASSUMESANYLEGALLIABILITYORRESPONSIBILITYFORTHEACCURACY,COMPLETENESS,ORUSEFULNESSOFANYINFORMATION,APPARATUS,PRODUCT,ORPROCESSDISCLOSED,ORREPRESENTSTHATITSUSEWOULDNOTINFRINGEPRIVATELYOWNEDRIGHTSiiiFOREWORDThismanualisapracticalguidefortheuseofthegeneralpurposeMonteCarlocodeMCNPThepreviousversionofthemanual(LAM,March)hasbeencorrectedandupdatedtoincludethenewfeaturesfoundinMCNPVersion(MCNP)Themanualhasalsobeensplitintovolumes:VolumeI:MCNPOverviewandTheoryChapters,andAppendicesG,HVolumeII:MCNPUser’sGuideChapters,,,andAppendicesA,B,I,J,KVolumeIII:MCNPDeveloper’sGuideAppendicesC,D,E,FVolumeI(LAUR)providesanoverviewofthecapabilitiesofMCNPandadetaileddiscussionofthetheoreticalbasisforthecodeThefirstchapterprovidesintroductoryinformationaboutMCNPThesecondchapterdescribesthemathematics,data,physics,andMonteCarlosimulationtechniqueswhichformthebasisforMCNPThisdiscussionisnotmeanttobeexhaustivedetailsofsometechniquesandoftheMonteCarlomethoditselfarecoveredbyreferencestotheliteratureVolumeII(LACP)providesdetailedspecificationsforMCNPinputandoptions,numerousexampleproblems,andadiscussionoftheoutputgeneratedbyMCNPThefirstchapterisaprimeronbasicMCNPuseThethirdchaptershowstheuserhowtoprepareinputforthecodeThefourthchaptercontainsseveralexamples,andthefifthchapterexplainstheoutputTheappendicesprovideinformationontheavailabledatalibrariesforMCNP,theformatforseveralinputoutputfiles,andplottingthegeometry,tallies,andcrosssectionsVolumeIII(LACP)providesdetailsonhowtoinstallMCNPonvariouscomputersystems,howtomodifythecode,themeaningofsomeofthecodevariables,anddatalayoutsforcertainarraysTheMonteCarlomethodforsolvingtransportproblemsemergedfromworkdoneatLosAlamosduringWorldWarIIThemethodisgenerallyattributedtoFermi,vonNeumann,Ulam,Metropolis,andRichtmyerMCNP,firstreleasedin,isthesuccessortotheirworkandhasbeenundercontinuousdevelopmentforthepastyearsNeitherthecodenorthemanualisstaticThecodeischangedasneedsarise,andthemanualischangedtoreflectthelatestversionofthecodeThisparticularmanualreferstoVersionMCNPandthismanualaretheproductofthecombinedeffortofmanypeopleintheDiagnosticsApplicationsGroup(X)intheAppliedPhysicsDivision(XDivision)attheLosAlamosNationalLaboratory:XMonteCarloTeamThomasEBoothJohnTGoorleyAvneetSoodForrestBBrownHGradyHughesJeremyESweezyJeffreySBullRussellDMostellerRichardFBarrett(X)LawrenceJCoxRichardEPraelSusanEPost(CCN)RArthurForsterElizabethCSelcowTeresaLRoberts(IM)XDataTeamJoannMCampbellRobertCLittleMorganCWhiteStephanieCFrankleTechnicalEditorsSheilaMGirardJudithBShinnThecodeandmanualcanbeobtainedfromtheRadiationSafetyInformationComputationalCenter(RSICC),POBox,OakRidge,TN,ForrestBBrownMCNPTeamLeader<fbrownlanlgov>ivvMCNP–AGeneralMonteCarloNParticleTransportCodeVersionXMonteCarloTeamDiagnosticsApplicationsGroupLosAlamosNationalLaboratoryABSTRACTMCNPisageneralpurposeMonteCarloN–Particlecodethatcanbeusedforneutron,photon,electron,orcoupledneutronphotonelectrontransport,includingthecapabilitytocalculateeigenvaluesforcriticalsystemsThecodetreatsanarbitrarythreedimensionalconfigurationofmaterialsingeometriccellsboundedbyfirstandseconddegreesurfacesandfourthdegreeellipticaltoriPointwisecrosssectiondataareusedForneutrons,allreactionsgiveninaparticularcrosssectionevaluation(suchasENDFBVI)areaccountedforThermalneutronsaredescribedbyboththefreegasandS(α,β)modelsForphotons,thecodeaccountsforincoherentandcoherentscattering,thepossibilityoffluorescentemissionafterphotoelectricabsorption,absorptioninpairproductionwithlocalemissionofannihilationradiation,andbremsstrahlungAcontinuousslowingdownmodelisusedforelectrontransportthatincludespositrons,kxrays,andbremsstrahlung,butdoesnotincludeexternalorselfinducedfieldsImportantstandardfeaturesthatmakeMCNPveryversatileandeasytouseincludeapowerfulgeneralsource,criticalitysource,andsurfacesourcebothgeometryandoutputtallyplottersarichcollectionofvariancereductiontechniquesaflexibletallystructureandanextensivecollectionofcrosssectiondataviTableofContentsVolumeI:OverviewandTheoryCHAPTERMCNPOVERVIEWMCNPANDTHEMONTECARLOMETHODMonteCarloMethodvsDeterministicMethodTheMonteCarloMethodINTRODUCTIONTOMCNPFEATURESNuclearDataandReactionsSourceSpecificationTalliesandOutputEstimationofMonteCarloErrorsVarianceReductionMCNPGEOMETRYCellsSurfaceTypeSpecificationSurfaceParameterSpecificationREFERENCESCHAPTERGEOMETRY,DATA,PHYSICS,ANDMATHEMATICSINTRODUCTIONHistoryMCNPStructureHistoryFlowGEOMETRYComplementOperatorRepeatedStructureGeometrySurfacesCROSSSECTIONSNeutronInteractionData:ContinuousEnergyandDiscreteReactionPhotonInteractionDataElectronInteractionDataNeutronDosimetryCrossSectionsNeutronThermalS(α,β)TablesMultigroupTablesPHYSICSWeightParticleTracksNeutronInteractionsPhotonInteractionsElectronInteractionsTALLIESSurfaceCurrentTallyFluxTalliesTrackLengthCellEnergyDepositionTalliesPulseHeightTalliesTOCTableofContentsFluxataDetectorAdditionalTallyFeaturesESTIMATIONOFTHEMONTECARLOPRECISIONMonteCarloMeans,Variances,andStandardDeviationsPrecisionandAccuracyTheCentralLimitTheoremandMonteCarloConfidenceIntervalsEstimatedRelativeErrorsinMCNPMCNPFigureofMeritSeparationofRelativeErrorintoTwoComponentsVarianceoftheVarianceEmpiricalHistoryScoreProbabilityDensityFunctionf(x)FormingStatisticallyValidConfidenceIntervalsAStatisticallyPathologicalOutputExampleVARIANCEREDUCTIONGeneralConsiderationsVarianceReductionTechniquesCRITICALITYCALCULATIONSCriticalityProgramFlowEstimationofkeffConfidenceIntervalsandPromptNeutronLifetimesRecommendationsforMakingaGoodCriticalityCalculationVOLUMESANDAREASRotationallySymmetricVolumesandAreasPolyhedronVolumesandAreasStochasticVolumeandAreaCalculationPLOTTERRANDOMNUMBERSPERTURBATIONSDerivationoftheOperatorLimitationsAccuracyREFERENCESAPPENDIXGMCNPDATALIBRARIESENDFBREACTIONTYPESS(α,β)DATAFORUSEWITHTHEMTnCARDNEUTRONCROSSSECTIONLIBRARIESMULTIGROUPDATAPHOTOATOMICDATAPHOTONUCLEARDATADOSIMETRYDATAREFERENCESAPPENDIXHFISSIONSPECTRACONSTANTSANDFLUXTODOSEFACTORSCONSTANTSFORFISSIONSPECTRAConstantsfortheMaxwellFissionSpectrum(Neutroninduced)ConstantsfortheWattFissionSpectrumTOCTableofContentsFLUXTODOSECONVERSIONFACTORSBiologicalDoseEquivalentRateFactorsSiliconDisplacementKermaFactorsREFERENCESVolumeII:User’sGuideCHAPTERPRIMERMCNPINPUTFORSAMPLEPROBLEMINPFileCellCardsSurfaceCardsDataCardsHOWTORUNMCNPExecutionLineInterruptsRunningMCNPTIPSFORCORRECTANDEFFICIENTPROBLEMSProblemSetupPreproductionProductionCriticality

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