- outputmeanThe value to output. Options are $\beta_{eff}$ (mean), the standard deviation of $\beta_{eff}$ (std_dev), or the relative error of $\beta_{eff}$ (rel_err).
Default:mean
C++ Type:MooseEnum
Controllable:No
Description:The value to output. Options are $\beta_{eff}$ (mean), the standard deviation of $\beta_{eff}$ (std_dev), or the relative error of $\beta_{eff}$ (rel_err).
BetaEffective
Description
BetaEffective computes the effective delayed neutron fraction () for point reactor kinetics calculations given that the OpenMC problem is set up to compute kinetics parameters with the method of iterative fission probabilities. is the adjoint flux weighted ratio of the delayed neutron yield (number of neutrons produced from the decay of delayed neutron precursors) to the total neutron yield from a fission event. This is an "effective" quantity as the delayed and total yield are a weak function of the spatial configuration of the system and the neutron spectrum. For more information on how these parameters are computed, we refer users to the OpenMC documentation.
Example Input Syntax
Shown below is an example of computing both and .
[Postprocessors<<<{"href": "../../syntax/Postprocessors/index.html"}>>>]
[lambda]
type = LambdaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\Lambda_{eff}$.", "href": "LambdaEffective.html"}>>>
[]
[lambda_rel]
type = LambdaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\Lambda_{eff}$.", "href": "LambdaEffective.html"}>>>
output<<<{"description": "The value to output. Options are $\\Lambda_{eff}$ (mean), the standard deviation of $\\Lambda_{eff}$ (std_dev), or the relative error of $\\Lambda_{eff}$ (rel_err)."}>>> = rel_err
[]
[lambda_std]
type = LambdaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\Lambda_{eff}$.", "href": "LambdaEffective.html"}>>>
output<<<{"description": "The value to output. Options are $\\Lambda_{eff}$ (mean), the standard deviation of $\\Lambda_{eff}$ (std_dev), or the relative error of $\\Lambda_{eff}$ (rel_err)."}>>> = std_dev
[]
[beta]
type = BetaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\beta_{eff}$.", "href": "BetaEffective.html"}>>>
[]
[beta_rel]
type = BetaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\beta_{eff}$.", "href": "BetaEffective.html"}>>>
output<<<{"description": "The value to output. Options are $\\beta_{eff}$ (mean), the standard deviation of $\\beta_{eff}$ (std_dev), or the relative error of $\\beta_{eff}$ (rel_err)."}>>> = rel_err
[]
[beta_std]
type = BetaEffective<<<{"description": "A post-processor which computes and returns the kinetics parameter $\\beta_{eff}$.", "href": "BetaEffective.html"}>>>
output<<<{"description": "The value to output. Options are $\\beta_{eff}$ (mean), the standard deviation of $\\beta_{eff}$ (std_dev), or the relative error of $\\beta_{eff}$ (rel_err)."}>>> = std_dev
[]
[]Input Parameters
- allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
Default:False
C++ Type:bool
Controllable:No
Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
- execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Controllable:No
Description:The list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
- execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
Default:0
C++ Type:int
Controllable:No
Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
- force_postauxFalseForces the UserObject to be executed in POSTAUX
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in POSTAUX
- force_preauxFalseForces the UserObject to be executed in PREAUX
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in PREAUX
- force_preicFalseForces the UserObject to be executed in PREIC during initial setup
Default:False
C++ Type:bool
Controllable:No
Description:Forces the UserObject to be executed in PREIC during initial setup
Execution Scheduling Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- outputsVector of output names where you would like to restrict the output of variables(s) associated with this object
C++ Type:std::vector<OutputName>
Controllable:No
Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object
- use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Advanced Parameters
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.