Void material.
Use this to fill empty spaces while maintaining proper volume fractions.
armi.materials.void.
Void
Bases: armi.materials.material.Fluid
armi.materials.material.Fluid
name
setDefaultMassFracs
init for void
paramCollectionType
alias of armi.reactor.parameters.parameterCollections.MaterialParameterCollection
armi.reactor.parameters.parameterCollections.MaterialParameterCollection