UO Fuel Thermal Expansion MATPRO Eigenstrain

Calculates eigenstrain due to thermal expansion in UO2 fuel using MATPRO correlations

Description

This class, UO2ThermalExpansionMatproEigenstrain, calculates the strain due to thermal expansion using correlations from MATPRO. The correlation in MATPRO is a function of Plutonium content in the fuel, the fraction of the fuel that is in a molten state, and the temperature of the fuel. These correlations are based on a reference temperature of 300K, but this class permits the use of arbitrary values for the stress-free temperature. In Bison we assume a Pu content of 0.0 and molten fuel fraction of 0.0 in computing the thermal expansion of the UO fuel.

This material uses the MATPRO fthexp function to determine the thermal expansion strains based on temperature (Allison et al., 1993).

Example Input Syntax


[./thermal_strain]
  type = UO2ThermalExpansionMatproEigenstrain
  block = 0
  temperature = temperature
  stress_free_temperature = 240
  eigenstrain_name = thermal_eigenstrain
[../]
(test/tests/tensor_mechanics/uo2_eigenstrains/uo2_matpro_cte.i)

The eigenstrain_name parameter value must also be set for the strain calculator, and an example parameter setting is shown below:


[./strain]
  type = ComputeAxisymmetricRZIncrementalStrain
  block = 0
  eigenstrain_names = thermal_eigenstrain
[../]
(test/tests/tensor_mechanics/uo2_eigenstrains/uo2_matpro_cte.i)

Input Parameters

  • stress_free_temperatureStress free temperature (does not produce thermal expansion stress) for thermal eigenstrain calculation; if unknown, this value is commonly set to be equal to the initial temperature.

    C++ Type:double

    Description:Stress free temperature (does not produce thermal expansion stress) for thermal eigenstrain calculation; if unknown, this value is commonly set to be equal to the initial temperature.

  • temperatureCoupled temperature, in K

    C++ Type:std::vector

    Description:Coupled temperature, in K

  • eigenstrain_nameMaterial property name for the eigenstrain tensor computed by this model. IMPORTANT: The name of this property must also be provided to the strain calculator.

    C++ Type:std::string

    Description:Material property name for the eigenstrain tensor computed by this model. IMPORTANT: The name of this property must also be provided to the strain calculator.

Required Parameters

  • 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

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

    Default:True

    C++ Type:bool

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

  • 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

  • base_nameOptional parameter that allows the user to define multiple mechanics material systems on the same block, i.e. for multiple phases

    C++ Type:std::string

    Description:Optional parameter that allows the user to define multiple mechanics material systems on the same block, i.e. for multiple phases

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.

  • 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.

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Description:The seed for the master random number generator

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

    Default:True

    C++ Type:bool

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

  • 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 computeSubdomainProperties() 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

    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 computeSubdomainProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

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

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

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

    Default:none

    C++ Type:std::vector

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

Outputs Parameters

Input Files

References

  1. C. M. Allison, G. A. Berna, R. Chambers, E. W. Coryell, K. L. Davis, D. L. Hagrman, D. T. Hagrman, N. L. Hampton, J. K. Hohorst, R. E. Mason, M. L. McComas, K. A. McNeil, R. L. Miller, C. S. Olsen, G. A. Reymann, and L. J. Siefken. SCDAP/RELAP5/MOD3.1 code manual, volume IV: MATPRO–A library of materials properties for light-water-reactor accident analysis. Technical Report NUREG/CR-6150, EGG-2720, Idaho National Engineering Laboratory, 1993.[BibTeX]