MCNPX 27B ExtensionsWord文档下载推荐.docx

MCNPX 27B ExtensionsWord文档下载推荐.docx

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StepanG.Mashnik

LaurieS.Waters

LosAlamosNationalLaboratory

http:

//mcnpx.lanl.gov

LosAlamosNationalLaboratory,anaffirmativeaction/equalopportunityemployer,isoperatedbytheLosAlamosNationalSecurity,LLCfortheNationalNuclearSecurityAdministrationoftheU.S.DepartmentofEnergyundercontractDE-AC52-06NA25396.Byacceptanceofthisarticle,thepublisherrecognizesthattheU.S.Governmentretainsanonexclusive,royalty-freelicensetopublishorreproducethepublishedformofthiscontribution,ortoallowotherstodoso,forU.S.Governmentpurposes.LosAlamosNationalLaboratoryrequeststhatthepublisheridentifythisarticleasworkperformedundertheauspicesoftheU.S.DepartmentofEnergy.LosAlamosNationalLaboratorystronglysupportsacademicfreedomandaresearcher’srighttopublish;

asaninstitution,however,theLaboratorydoesnotendorsetheviewpointofapublicationorguaranteeitstechnicalcorrectness.

by

July6,2009

Copyright2009.LosAlamosNationalSecurity,LLC.Allrightsreserved.

ThismaterialwasproducedunderU.S.GovernmentcontractDE-AC52-06NA25396forLosAlamosNationalLaboratory,whichisoperatedbyLosAlamosNationalSecurity,LLCfortheU.S.DepartmentofEnergy.TheGovernmentisgrantedforitselfandothersactingonitsbehalfapaid-up,nonexclusive,irrevocableworldwidelicenseinthismaterialtoreproduce,preparederivativeworks,andperformpubliclyanddisplaypublicly.Beginningfive（5）yearsafter（insertdatepermissiontoassertcopyrightwasobtained）,subjecttoadditionalfive-yearworldwiderenewals,theGovernmentisgrantedforitselfandothersactingonitsbehalfapaid-up,nonexclusive,irrevocableworldwidelicenseinthismaterialtoreproduce,preparederivativeworks,distributecopiestothepublic,performpubliclyanddisplaypublicly,andtopermitotherstodoso.

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TABLEOFCONTENTS

1Introduction1

1.1SummaryofNewMCNPXFeatures1

1.2Availability2

1.3Documentation2

1.4CashAwardsQualityAssuranceProgram2

2DescriptionofnewMCNPXFeatures3

2.1TallyTagging3

2.1.1UserInterface3

2.1.2UsageandSpecialCases4

2.1.3Examples5

2.2CEM3.02Upgrade,6

2.3MCPLOTGraphicsand“HELP”CommandUpgrades8

2.3.1GraphicsUpgrades8

2.3.2“HELP”CommandUpgrade11

2.4EmbeddedSources12

2.4.1UserInterface12

2.4.2Examples13

2.5StoppingPowerEnergyTableControl16

2.6CyclicTimeBins16

3MCNPX2.7.BFeatureEXTENSIONSandEnhancements16

3.1SpontaneousPhotonAutomaticWeightAdjustment16

3.2BurnupEnhancements19

3.3LatticeFILLErrorTrap20

3.4LINUXStaticBuild20

3.5Windows64-bitSupport/CompilationwithoutGraphics20

3.6SpecialTreatmentTallyforElectronCurrent21

3.7RUNTPEInitializationDuringMPI21

3.8NewSpecialTreatmentTally:

LET21

3.9SpecialDoseFunction21

3.10ResidualTallyUpgrades22

3.11LatticeCellRejectionforSources22

3.12ACT:

ActivationControlCard22

3.13Spectra/LinesforDelayedNeutronEmission23

3.14TFCardExtension23

3.15MinorEnhancements:

23

4MCNPXCorrections24

4.1SignificantProblemCorrections24

4.1.1MinorBurnupReactionRatesOff24

4.1.2SpontaneousFissionNormalizationError24

4.1.3DXTRANFailwithRepeatedStructures24

4.1.4HeavyIonErrors24

4.1.5S（α,β）FileReadingFailure24

4.1.6BurnupContinueRuns25

4.1.7HeavyIons25

4.1.8SpontaneousFissionAutomaticWeighting25

4.1.9SpontaneousPhotonMaterial/CellError25

4.2MinorProblemCorrections25

4.2.1INTELCompilerWorkaround26

4.2.2LAQGSMCorrections26

4.2.3CompilerWorkaround26

4.2.4DetectorTalliesinLatticeGeometries26

4.2.5BurnupDuplicateZAIDs26

4.2.6SourceParticleTypesUnrecognizedinDependentDistributions26

4.2.7IncorrectWarningErrorforDetectorTallies26

4.2.8ChoiceofHigh-EnergyMode27

4.2.9LostParticlesCauseCrash27

4.2.10TallyTaggingLabels27

4.2.11HeavyIonDirectionCosines27

4.2.12CylindricalMeshTally27

4.2.13StoppingPowerBinControl27

4.2.14RevisedGDR.DAT27

4.2.15MuonPhysics27

4.2.16LightIonProductionfromInelasticCollisions27

4.2.17IsomerBranchinginBurnup28

4.2.18PTRACCaptureEvents28

4.2.19BurnupTier3FissionProducts28

4.2.20KCODEFissionSourceinMPI28

4.2.21CEM/LAQGSM28

4.2.22DelayedNeutron/DelayedGammaCorrection28

4.2.23SecondaryParticleArraysIncreased28

4.2.24MPIRunWallClockCorrection28

4.2.25UninitializedorOut-of-BoundsArrays29

5Futurework29

ABSTRACT

MCNPXisaFortran90MonteCarloradiationtransportcomputercodethattransportsnearlyallparticlesatnearlyallenergiesfornearlyallapplications.Thenewcapabilitiesofthelatestversion,MCNPX 

2.7.B,beyondthoseinMCNPX2.6.0,aredescribed.

1Introduction

MCNPX（MCNPeXtended）isaFortran90（F90）MonteCarloradiationtransportcomputercodethattransportsnearlyallparticlesatnearlyallenergies.ItisasupersetofMCNP4C3andhasmanycapabilitiesbeyondMCNP4C3.MCNPXisaproductioncomputercodethatmodelstheinteractionofradiationwithmatter.Itsqualityishighlyregardedandcashawards（describedinSection 

1.4）areofferedforbugs.

1.1SummaryofNewMCNPXFeatures

ThenewcapabilitiesandenhancementsofMCNPX 

2.7.BbeyondMCNPX 

2.6.0arelistedbelow.（Whereapplicable,theinitialsoftheprincipaldevelopersareshowninparentheses.）Notethatthedelayed-gammaemissionandcriticalitysourceconvergenceaccelerationcapabilitiesaredevelopmental.TheyarenotbackedbytheMCNPXcashawardsqualityassuranceprogramandmustbeusedcautiously.However,thesecapabilitiesareconsideredofsuchsignificancethattheyareincluded.Recallalsothatasofversion2.6.0total（notprompt）isthedefaultforfissionneutrons.ThenewMCNPX 

2.7.Bcapabilitiesincludethefollowing:

∙Tallytagging（GWM）

∙CEM3.02upgrade（MRJ/SGM）

∙Plotappearanceupgrades（JWD）

∙Embeddedsources（JSH）

∙Stoppingpowerenergytablecontrol（GWM）

∙Cyclictimebins（GWM）

∙Extensionsandenhancements

∙Corrections

1.2Availability

Thelatestgeneral-releaseversionisMCNPX 

2.6.0,whichisavailablefromtheRadiationSafetyInformationComputationalCenter（RSICC）andtheOfficeofEconomicCooperationandDevelopment/NuclearEnergyAgency（OECD/NEA）inParis,France.

Forapprovedusers,betatestprogramversionsmaybedownloadedfromtheMCNPXwebsite.Approximately2000MCNPXbetatestusersareanessentialpartoftheMCNPXsoftwarequalityassuranceprogram.Ingeneral,tobecomeanewbetatestuserusuallyrequiresbeinganMCNPXsponsor,collaborator,orU.S.citizenparticipantinanMCNPXworkshoptrainingcourse.Formoreinformation,contactusatthefollowingaddress:

mcnpx@lanl.gov.

MCNPXisU.S.exportcontrolled.Generally,MCNPXiseasytoobtainforlegitimatepurposes,butrestrictionsprotectthecode,data,anddocumentationonceitisacquired.

1.3Documentation

RestrictedDocumentation:

CompleteMCNPXdocumentationisavailableinthe“MCNPX™User’sManualVersion 

2.6.0,”whichcomeswithMCNPXfromRSICCorOECD/NEAandisavailabletoMCNPXbetatestersfromtheWorldwideWeb（WWW）.

UnrestrictedDocumentation:

DocumentationofMCNPXfeaturesinMCNPX 

2.5.0—thatis,allMCNPXfeaturesbeyondMCNPX 

2.3.0andMCNP4C—isprovidedin“MCNPXExtensions,Version 

2.5.0.”Similarly,featuresbeyondMCNPX 

2.5.0thatappearinMCNPX 

2.6.0,aredescribedin"

MCNPX 

2.6.0Extensions."

MCNPXcapabilitiesdevelopedsinceMCNPX 

2.6.0aredocumentedinthisreport.

AlloftheextendedMCNPXcapabilitiesaresummarizedintheone-pageMCNPXfeatureslist.

1.4CashAwardsQualityAssuranceProgram

WearesoconfidentinthequalityofMCNPXthatJohnHendricksandMichaelJamesoffercashawardstothefirstpersonwhofindsanybuginthecode.Theywillpay$20tothefirstpersonfindinganythingthatdoesnotmeetorexceedthecapabilitiesofMCNPX 

2.3.0andMCNP4C3.Europeanuserswillbeawarded€20.Theyalsowillpayabrandnew$2billforanyerrorinMCNPXthathasbeeninheritedfromitsconstituentcodes.AlistofallwinnerssinceJune 

2001canbefoundontheMCNPXWWWsite.

2DescriptionofnewMCNPXFeatures

Notethatthedelayed-gammaemissionandcriticalitysourceconvergenceaccelerationcapabilitiesaredevelopmental.ThesecapabilitiesarenotbackedbytheMCNPXcashawardsprogramandmustbeusedcautiously.Nevertheless,theyareconsideredofsuchsignificancethattheyareincluded.

TheprincipalnewcapabilitiesofMCNPXbeyondMCNPX 

2.6.0describedindetailinthissectionare

∙Tallytagging

∙CEM3.02upgrade

∙Plotappearanceupgrades

∙Embeddedsources

∙Stoppingpowerenergytablecontrol

∙Cyclictimebins

2.1TallyTagging

Tallytagging,anewfeatureinv.2.7.A,providestheabilitytoseparateatallyintocomponentsbasedonhowandwherethescoringparti