modelFissionProducts

Parameters

TypeNameDefaultDescription
IntegernCdata.nC# of fission products
IntegernFSdata.nFS# of fission product sources
IntegernTdata.nT# of fission product types (e.g., fast/thermal)
Realparentsdata.parentsMatrix of parent-daughter sources
IntegernC_add0# of additional substances (i.e., trace fluid substances)
Initialization › Fission Sources
Units.NonDim[nFS]fissionSources_startfill(1/nFS, nFS)Fission source material fractional composition (sum=1)
Units.NonDim[nFS,nT]fissionTypes_startfill(1/nT, nFS, nT)Fraction of fission from each fission type per fission source, sum(row) = 1
Units.NonDimnu_bar_start2.4Neutrons per fission
SI.Energyw_f_start200e6*1.6022e-19Energy released per fission
SI.MacroscopicCrossSectionSigmaF_start1Macroscopic fission cross-section of fissile material
Initialization › Fission Products
SI.Area[nC]sigmasA_startdata.sigmasAMicroscopic absorption cross-section for reactivity feedback
Real[nC,nFS,nT]fissionYields_startdata.fissionYields# fission product atoms yielded per fission per fissile source [#/fission]
Units.InverseTime[nC]lambdas_startdata.lambdasDecay constants for each fission product
Initialization
SIadd.ExtraPropertyExtrinsic[nC]mCs_startfill(0, nC)Number of fission product atoms per group per volume
Advanced › Dynamics
DynamicstraceDynamicsDynamics.DynamicFreeInitialFormulation of trace substance balances
Advanced
Real[nC]mC_nominalfill(1e-6, nC)Nominal fission product atoms. For numeric purposes only.
Initialization › Additional Reactivity
SI.Area[nC_add]sigmasA_add_startfill(0, nC_add)Microscopic absorption cross-section for reactivity feedback

Components

TypeNameDefaultDescription
Datadata
Units.NonDim[nFS]dfissionSourcesfill(0, nFS)Change in source of fissile material fractional composition (sum=1)
Units.NonDim[nFS,nT]dfissionTypesfill(0, nFS, nT)Change in fraction of fission from each fission type per fission source, sum(row) = 1
Units.NonDimdnu_bar0Change in neutrons per fission
SI.Energydw_f0Change in energy released per fission
SI.MacroscopicCrossSectiondSigmaF0Change in macroscopic fission cross-section of fissile material
SI.Area[nC]dsigmasAfill(0, nC)Change in microscopic absorption cross-section for reactivity feedback
Real[nC,nFS,nT]dfissionYieldsfill(0, nC, nFS, nT)Change in # fission product atoms yielded per fission per fissile source [#/fission]
Units.InverseTime[nC]dlambdasfill(0, nC)Change in decay constants for each fission product
Units.NonDim[nFS]fissionSourcesfissionSources_start + dfissionSourcesSource of fissile material fractional composition (sum=1)
Units.NonDim[nFS,nT]fissionTypesfissionTypes_start + dfissionTypesFraction of fission from each fission type per fission source, sum(row) = 1
Units.NonDimnu_barnu_bar_start + dnu_barNeutrons per fission
SI.Energyw_fw_f_start + dw_fEnergy released per fission
SI.MacroscopicCrossSectionSigmaFSigmaF_start + dSigmaFMacroscopic fission cross-section of fissile material
SI.Area[nC]sigmasAsigmasA_start + dsigmasAMicroscopic absorption cross-section for reactivity feedback
Real[nC,nFS,nT]fissionYieldsfissionYields_start + dfissionYields# fission product atoms yielded per fission per fissile source [#/fission]
Units.InverseTime[nC]lambdaslambdas_start + dlambdasDecay constants for each fission product
SI.PowerQs_fission1e6Power determined from kinetics. Does not include fission product decay heat
SI.VolumeVs0.1Volume for fisson product concentration basis
SIadd.NeutronFluxphiNeutron flux
SIadd.ExtraPropertyFlowRatemC_gensGeneration rate of fission products [atoms/s]
SIadd.ExtraPropertyExtrinsic[nC]mCsNumber of fission product atoms
SIadd.ExtraPropertyExtrinsicmCs_scaledScaled number of fission product atoms for improved numerical stability
SIadd.ExtraPropertyExtrinsic[nC_add]mCs_addfill(0, nC_add)Number of atoms
SI.VolumeVs_add0.1Volume for fisson product concentration basis
SI.Area[nC_add]dsigmasA_addfill(0, nC_add)Change in microscopic absorption cross-section for reactivity feedback
SI.Area[nC_add]sigmasA_addsigmasA_add_start + dsigmasA_addMicroscopic absorption cross-section for reactivity feedback
SIadd.NonDim[nC]rhosFission product reactivity feedback
SIadd.ExtraPropertyFlowRatemC_gens_addGeneration rate of additional substances [atoms/s] (e.g., Boron in fluid)
SIadd.NonDim[nC_add]rhos_addAdditional subtances reactivity feedback

Contents

NameDescription
Data