modelPointKinetics_L1_powerBased
Information
For point kinetics leave nV = 1
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Power | Q_nominal | 1e6 | Total nominal reactor power (fission + decay) |
| Boolean | specifyPower | false | =true to specify power (i.e., no der(P) equation) |
| Integer | nC | data.nC | # of delayed-neutron precursors groups |
| Units.NonDim[nC] | betas_start | alphas_start*Beta_start | Delayed neutron precursor fractions |
| SI.Power[nC] | Cs_start_history | ||
| SI.Energy[nDH] | Es_start_history | ||
| Integer | nFP | fissionProducts.data.nC | # of fission products |
| Integer | nFS | fissionProducts.data.nFS | # of fission product sources |
| Integer | nT | fissionProducts.data.nT | # of fission product types (e.g., fast/thermal) |
| Integer | nC_add | 0 | # of additional substances (i.e., trace fluid substances) |
| SI.Area[nC_add] | sigmasA_add_start | fill(0, nC_add) | Microscopic absorption cross-section for reactivity feedback |
| Kinetics › Inputs: Reactivity Feedback | |||
| Integer | nFeedback | 0 | # of reactivity feedbacks (alpha*(val-val_ref) |
| Kinetics › Decay-Heat | |||
| Integer | nDH | data_DH.nC | # of decay-heat groups |
| TRANSFORM.Units.InverseTime[nDH] | lambdas_dh_start | data_DH.lambdas | Decay constant |
| Units.NonDim[nDH] | efs_dh_start | data_DH.efs | Effective energy fraction |
| Boolean | use_history | false | =true to provide power history |
| SI.Power | history | fill(0, 0, 2) | Power history up to simulation time=0, [t,Q] |
| Boolean | includeDH | false | =true if power history includes decay heat |
| Kinetics › Neutron Kinetics | |||
| Units.InverseTime[nC] | lambdas_start | data.lambdas | Decay constants for each precursor group |
| Units.NonDim[nC] | alphas_start | data.alphas | Normalized precursor fractions [betas = alphas*Beta] |
| TRANSFORM.Units.NonDim | Beta_start | data.Beta | Effective delayed neutron fraction [e.g., Beta = sum(beta_i)] |
| SI.Time | Lambda_start | 1e-5 | Prompt neutron generation time |
| Initialization | |||
| SI.Power | Q_fission_start | Q_nominal/(1 + sum(efs_dh_start)) | Initial reactor fission power |
| SI.Power | Cs_start | {betas_start[j]/(lambdas_start[j]*Lambda_start)*Q_fission_start for j in 1:nC} | Power of the initial delayed-neutron precursor concentrations |
| SI.Energy[nDH] | Es_start | {Q_fission_start*efs_dh_start[j]/lambdas_dh_start[j] for j in 1:nDH} | Initial decay heat group energy |
| SI.Volume | V_start | Volume for fisson product concentration basis | |
| SIadd.ExtraPropertyExtrinsic[nFP] | mCs_start | Functions.Initial_FissionProducts(fissionProducts.nC, fissionProducts.nFS, fissionProducts.nT, fissionProducts.parents, fissionSources_start, fissionProducts.fissionTypes_start, fissionProducts.w_f_start, fissionProducts.SigmaF_start, fissionProducts.sigmasA_start, fissionProducts.fissionYields_start, fissionProducts.lambdas_start, fill(1e10, fissionProducts.nC), fissionProducts.Q_fission_start, fissionProducts.V_start) | Number of fission product atoms per group per volume |
| Advanced › Dynamics | |||
| Dynamics | energyDynamics | Dynamics.DynamicFreeInitial | Formulation of nuclear kinetics balances |
| Dynamics | traceDynamics | energyDynamics | Formulation of neutron precursor balances |
| Dynamics | decayheatDynamics | energyDynamics | Formulation of decay-heat balances |
| Dynamics | fissionProductDynamics | traceDynamics | Formulation of fission product balances |
| Kinetics › Fission Sources | |||
| Units.NonDim[nFS] | fissionSources_start | fill(1/nFS, nFS) | Source of fissile material fractional composition (sum=1) |
| Units.NonDim[nFS,nT] | fissionTypes_start | fill(1/nT, nFS, nT) | Fraction of fission from each fission type per fission source, sum(row) = 1 |
| Units.NonDim | nu_bar_start | 2.4 | Neutrons per fission |
| SI.Energy | w_f_start | 200e6*1.6022e-19 | Energy released per fission |
| SI.MacroscopicCrossSection | SigmaF_start | 1 | Macroscopic fission cross-section of fissile material |
| Advanced | |||
| Real[nFP] | mC_nominal | fill(1e-6, nFP) | Nominal fission product atoms. For numeric purposes only. |
| Boolean | toggle_ReactivityFP | true | =true to include fission product reacitivity feedback |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Data | data | ||
| Data_DH | data_DH | ||
| SI.Power | Q_fission_input | Q_nominal | Fission power (if specifyPower=true) |
| SI.Power | Q_external | 0 | Power from external source of neutrons |
| TRANSFORM.Units.NonDim | rho_input | 0 | External Reactivity |
| Real[nFeedback] | alphas_feedback | fill(0, nFeedback) | Reactivity feedback coefficient (e.g., temperature [1/K]) |
| Real[nFeedback] | vals_feedback | vals_feedback_reference | Variable value for reactivity feedback (e.g. fuel temperature) |
| Real[nFeedback] | vals_feedback_reference | fill(1, nFeedback) | Reference value for reactivity feedback (e.g. fuel reference temperature) |
| Units.InverseTime[nC] | dlambdas | fill(0, nC) | Change in decay constants for each precursor group |
| Units.NonDim[nC] | dalphas | fill(0, nC) | Change in normalized precursor fractions [betas = alphas*Beta] |
| TRANSFORM.Units.NonDim | dBeta | 0 | Change in effective delayed neutron fraction [e.g., Beta = sum(beta_i)] |
| SI.Time | dLambda | 0 | Change in prompt neutron generation time |
| Units.InverseTime[nC] | lambdas | lambdas_start + dlambdas | Decay constants for each precursor group |
| Units.NonDim[nC] | alphas | alphas_start + dalphas | Normalized precursor fractions [beta_i = alpha_i*Beta] |
| TRANSFORM.Units.NonDim | Beta | Beta_start + dBeta | Effective delayed neutron fraction [e.g., Beta = sum(beta_i)] |
| SI.Time | Lambda | Lambda_start + dLambda | Prompt neutron generation time |
| Units.InverseTime[nDH] | dlambdas_dh | fill(0, nDH) | Change in decay constant |
| Units.NonDim[nDH] | defs_dh | fill(0, nDH) | Change in effective energy fraction |
| TRANSFORM.Units.InverseTime[nDH] | lambdas_dh | lambdas_dh_start + dlambdas_dh | Decay constant |
| Units.NonDim[nDH] | efs_dh | efs_dh_start + defs_dh | Effective energy fraction |
| Units.NonDim[nC] | betas | alphas*Beta | Delayed neutron precursor fractions |
| TRANSFORM.Units.NonDim | rhos_feedback | Linear reactivity feedback | |
| TRANSFORM.Units.NonDim | rho | Total reactivity feedback | |
| SI.Power | Q_total | Total power determined from kinetics and decay-heat | |
| SI.Power | Q_fission | Fission power determined from kinetics, excluding decay-heat | |
| SI.Power[nDH] | Qs_decay | Decay-heat per group | |
| SI.Power | Q_decay | sum(Qs_decay[:]) | Total decay-heat |
| TRANSFORM.Units.NonDim | eta | Q_decay/max(1, Q_fission) | Ratio of decay heat to fisson power |
| SI.Power[nC] | Cs | Power of the delayed-neutron precursor concentration | |
| SI.Energy[nDH] | Es | Energy of the decay-heat precursor group | |
| TRANSFORM.Nuclear.ReactorKinetics.Reactivity.FissionProducts | fissionProducts | ||
| Units.NonDim[nFS] | dfissionSources | fill(0, nFS) | Change in source of fissile material fractional composition (sum=1) |
| Units.NonDim[nFS,nT] | dfissionTypes | fill(0, nFS, nT) | Change in fraction of fission from each fission type per fission source, sum(row) = 1 |
| Units.NonDim | dnu_bar | 0 | Change in neutrons per fission |
| SI.Energy | dw_f | 0 | Change in energy released per fission |
| SI.MacroscopicCrossSection | dSigmaF | 0 | Change in macroscopic fission cross-section of fissile material |
| SI.Area[nFP] | dsigmasA | fill(0, nFP) | Change in microscopic absorption cross-section for reactivity feedback |
| Real[nFP,nFS,nT] | dfissionYields | fill(0, nFP, nFS, nT) | Change in # fission product atoms yielded per fission per fissile source [#/fission] |
| Units.InverseTime[nFP] | dlambdas_FP | fill(0, nFP) | Change in decay constants for each fission product |
| SI.Volume | V | 0.1 | Volume for fisson product concentration basis |
| SIadd.ExtraPropertyExtrinsic[nC_add] | mCs_add | fill(0, nC_add) | Number of atoms |
| SI.Volume | Vs_add | 0.1 | Volume for fisson product concentration basis |
| SI.Area[nC_add] | dsigmasA_add | fill(0, nC_add) | Change in microscopic absorption cross-section for reactivity feedback |
Contents
| Name | Description |
|---|---|
 Data | |
 Data_DH | |
 Data_FP |