Fast Neutron Flux AuxKernel

Compute fast neutron flux.

Description

Fast neutron flux may be specified as problem input. However, it may also be estimated given the linear heat rate. (1) where is the fast neutron flux, is a conversion factor, typically 3e13 (n/(ms)/(W/m)), and P is the linear heat rate (W/m).

Example Input Syntax

[./fast_neutron_flux]
  type = FastNeutronFluxAux
  variable = fast_neutron_flux
  factor = 1e18 # n/m^2-sec
  execute_on = 'initial linear'
[../]
(test/tests/tensor_mechanics/zry_creep/creep_limback_rz_tm.i)

Input Parameters

  • variableThe name of the variable that this object applies to

    C++ Type:AuxVariableName

    Description:The name of the variable that this object applies to

Required Parameters

  • functionThe function that describes the fast neutron flux

    C++ Type:FunctionName

    Description:The function that describes the fast neutron flux

  • axial_power_profileThe axial power profile function

    C++ Type:FunctionName

    Description:The axial power profile function

  • rod_ave_lin_powThe power history function

    C++ Type:FunctionName

    Description:The power history function

  • q_variableVariable holding linear heat rate in pellet in W/m

    C++ Type:std::vector

    Description:Variable holding linear heat rate in pellet in W/m

  • factorThe fast neutron flux if the function, RALP, and q_variable are not given. A scaling factor if the function, RALP, or q_variable is given. If RALP or q_variable is given, it is recommended to use a value of 3e13 (n/(m^2s)/(W/m)).

    C++ Type:double

    Description:The fast neutron flux if the function, RALP, and q_variable are not given. A scaling factor if the function, RALP, or q_variable is given. If RALP or q_variable is given, it is recommended to use a value of 3e13 (n/(m^2s)/(W/m)).

  • execute_onLINEARThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

    Default:LINEAR

    C++ Type:ExecFlagEnum

    Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

  • boundaryThe list of boundary IDs from the mesh where this boundary condition applies

    C++ Type:std::vector

    Description:The list of boundary IDs from the mesh where this boundary condition applies

  • blockThe list of block ids (SubdomainID) that this object will be applied

    C++ Type:std::vector

    Description:The list of block ids (SubdomainID) that this object will be applied

Optional Parameters

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Description:Set the enabled status of the MooseObject.

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Description:The seed for the master random number generator

  • 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

    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

Input Files