FissionRate

Computes fission rate based on linear power and axial power profile.

Description

FissionRate calculates the local fission rate density in cylindrical 2DRz geometry only at this time (i.e. radial direction and axial direction ) based on the rod linear power and axial power profile , where (J/fsn) is the energy released per fission event.

is passed as a Function given only as a function of time. This function corresponds to the power produced by the entire fuel pin.

is also passed as a Function, only given as a function of time and axial position. This can be completed in any Function, but is typically provided via PowerPeakingFunction. represents the ratio between the power at any axial slice of the fuel and the total rod power , and must be normalized to return an average value of 1 over the entire length of the rod, where is the length of the rod.

The rod radius can either be provided directly via "pellet_inner_radius", or through MeshMetaDataInterface by using "use_metadata".

Example Input Syntax

[Materials<<<{"href": "../../syntax/Materials/index.html"}>>>]
  [fission_rate]
    type = FissionRate<<<{"description": "Computes fission rate based on linear power and axial power profile.", "href": "FissionRate.html"}>>>
    rod_linear_power<<<{"description": "Function that describes the linear power as a function of time."}>>> = power_profile
    axial_power_profile<<<{"description": "Function that describes the axial power profile as a function of axial position and time."}>>> = axial_profile
    energy_per_fission<<<{"description": "energy per fission"}>>> = ${energy_per_fission}
    pellet_radius<<<{"description": "Fuel pellet radius"}>>> = ${pellet_radius}
    pellet_inner_radius<<<{"description": "Pellet inner radius"}>>> = '${fparse pellet_radius / 2}'
    outputs<<<{"description": "Vector of output names where you would like to restrict the output of variables(s) associated with this object"}>>> = all
    output_properties<<<{"description": "List of material properties, from this material, to output (outputs must also be defined to an output type)"}>>> = fission_rate
  []
[]
(test/tests/fission_rate/exact.i)

Input Parameters

  • axial_power_profileFunction that describes the axial power profile as a function of axial position and time.

    C++ Type:FunctionName

    Unit:(no unit assumed)

    Controllable:No

    Description:Function that describes the axial power profile as a function of axial position and time.

  • rod_linear_powerFunction that describes the linear power as a function of time.

    C++ Type:FunctionName

    Unit:(no unit assumed)

    Controllable:No

    Description:Function that describes the linear power as a function of time.

Required Parameters

  • blockThe list of blocks (ids or names) that this object will be applied

    C++ Type:std::vector<SubdomainName>

    Controllable:No

    Description:The list of blocks (ids or names) that this object will be applied

  • boundaryThe list of boundaries (ids or names) from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundaries (ids or names) from the mesh where this object applies

  • computeTrueWhen false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

    Default:True

    C++ Type:bool

    Controllable:No

    Description:When false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

  • constant_onNONEWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

    Default:NONE

    C++ Type:MooseEnum

    Options:NONE, ELEMENT, SUBDOMAIN

    Controllable:No

    Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

  • declare_suffixAn optional suffix parameter that can be appended to any declared 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 declared properties. The suffix will be prepended with a '_' character.

  • energy_per_fission3.28451e-11energy per fission

    Default:3.28451e-11

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:energy per fission

  • fission_rate_namefission_rateName of the fission rate material property this object creates

    Default:fission_rate

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Name of the fission rate material property this object creates

  • mesh_generatorThe name of the generator to use as the prefix for mesh meta data properties.

    C++ Type:MeshGeneratorName

    Controllable:No

    Description:The name of the generator to use as the prefix for mesh meta data properties.

  • mesh_property_namefuel_radiusThe name of the mesh property that needs to be read.

    Default:fuel_radius

    C++ Type:std::string

    Controllable:No

    Description:The name of the mesh property that needs to be read.

  • pellet_inner_radius0Pellet inner radius

    Default:0

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Pellet inner radius

  • pellet_radiusFuel pellet radius

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Fuel pellet radius

  • radial_power_profile1Function that describes the radial power profile as a function of axial position and time.

    Default:1

    C++ Type:FunctionName

    Unit:(no unit assumed)

    Controllable:No

    Description:Function that describes the radial power profile as a function of axial position and time.

  • use_metadataFalseWhether to use the pellet radius value from MeshMetaDataInterface.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether to use the pellet radius value from MeshMetaDataInterface.

Optional 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.

  • implicitTrueDetermines whether this object is calculated using an implicit or explicit form

    Default:True

    C++ Type:bool

    Controllable:No

    Description:Determines whether this object is calculated using an implicit or explicit form

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Controllable:No

    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

    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

  • output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:List of material properties, from this material, to output (outputs must also be defined to an output type)

  • outputsnone Vector of output names where you would like to restrict the output of variables(s) associated with this object

    Default:none

    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

Outputs 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.

Material Property Retrieval Parameters

Input Files

References

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