Decay Heat Function

Calculate the decay heat as a fraction of recoverable fission energy using the ANSI/ANS-5.1-2005 Standard.

Description

DecayHeatFunction computes the value of the decay heat function. The value is zero prior to the specified time_at_shutdown. This postprocessor is typically used for Loss of Coolant Accident simulations.

Example Input Syntax


[Postprocessors]
  [./decay_heat_function]
    type = DecayHeatFunction
    time_at_shutdown = 1e8
    neutron_capture_factor = 1
  [../]
  [./decay_heat_sum]
    type = DecayHeatFunction
    time_at_shutdown = 1e8
    neutron_capture_factor = 1
    table_or_sum = sum
  [../]
[]
(test/tests/decay_heating/interpolate_vs_series.i)

Input Parameters

  • execute_onTIMESTEP_ENDThe 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:TIMESTEP_END

    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.

  • energy_per_fission3.28451e-11Energy released per fission (J/fission)

    Default:3.28451e-11

    C++ Type:double

    Description:Energy released per fission (J/fission)

  • table_or_sumtableInterpolate value from table (fast) or use the 23-term exponential series (slower): table sum

    Default:table

    C++ Type:MooseEnum

    Description:Interpolate value from table (fast) or use the 23-term exponential series (slower): table sum

  • neutron_capture_factor1neutron capture factor

    Default:1

    C++ Type:double

    Description:neutron capture factor

  • time_at_shutdown1e+10Time at shutdown

    Default:1e+10

    C++ Type:double

    Description:Time at shutdown

Optional Parameters

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Description:Set the enabled status of the MooseObject.

  • 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.

  • outputsVector of output names were you would like to restrict the output of variables(s) associated with this object

    C++ Type:std::vector

    Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object

  • 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.

  • 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

    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).

  • force_preauxFalseForces the GeneralUserObject to be executed in PREAUX

    Default:False

    C++ Type:bool

    Description:Forces the GeneralUserObject to be executed in PREAUX

Advanced Parameters

Input Files