# Burnup AuxVariable Action

The BurnupAuxVarsAction system is used to create the set of auxvariables required to store the radial average burnup and heavy metal isotope concentrations as calculated by the BurnupFunction. See the description, example use, and parameters on the Burnup action page.

## Input Parameters

• blockThe block id where this variable lives

C++ Type:std::vector

Description:The block id where this variable lives

### Required Parameters

• N235Specifies that the concentration of 235 is required.

C++ Type:std::string

Description:Specifies that the concentration of 235 is required.

• N240Specifies that the concentration of 240 is required.

C++ Type:std::string

Description:Specifies that the concentration of 240 is required.

• N242Specifies that the concentration of 242 is required.

C++ Type:std::string

Description:Specifies that the concentration of 242 is required.

• N236Specifies that the concentration of 236 is required.

C++ Type:std::string

Description:Specifies that the concentration of 236 is required.

• familyMONOMIALSpecifies the family of FE shape functions to use for this variable

Default:MONOMIAL

C++ Type:std::string

Description:Specifies the family of FE shape functions to use for this variable

• base_nameBase name for the AuxVariables.

C++ Type:std::string

Description:Base name for the AuxVariables.

• N241Specifies that the concentration of 241 is required.

C++ Type:std::string

Description:Specifies that the concentration of 241 is required.

• fuel_typeUO2Fuel type. Choices are UO2 U3Si2

Default:UO2

C++ Type:MooseEnum

Description:Fuel type. Choices are UO2 U3Si2

• N239Specifies that the concentration of 239 is required.

C++ Type:std::string

Description:Specifies that the concentration of 239 is required.

• N238Specifies that the concentration of 238 is required.

C++ Type:std::string

Description:Specifies that the concentration of 238 is required.

• average_burnupSpecifies that the radial average burnup is required.

C++ Type:std::string

Description:Specifies that the radial average burnup is required.

• inactiveIf specified blocks matching these identifiers will be skipped.

C++ Type:std::vector

Description:If specified blocks matching these identifiers will be skipped.

• RPFSpecifies that the radial power factor is required.

C++ Type:std::string

Description:Specifies that the radial power factor is required.

• active__all__ If specified only the blocks named will be visited and made active

Default:__all__

C++ Type:std::vector

Description:If specified only the blocks named will be visited and made active

• orderCONSTANTSpecifies the order of the FE shape function to use for this variable

Default:CONSTANT

C++ Type:std::string

Description:Specifies the order of the FE shape function to use for this variable