Clarification on `generate_core_metadata'

[tannhorn]

When using the reactor module, does it make sense to set generate_core_metadata = true if the core has only one level of patterning? The code is set to disallow generate_core_metadata = true with PatternedHexMeshGenerator object using PolygonConcentricCircleMeshGenerator objects as pattern inputs.

However, note that if using HexagonConcentricCircleAdaptiveBoundaryMeshGenerator instead of PolygonConcentricCircleMeshGenerator (basically just replacing the type), core metadata can now be generated. Not sure if this working as intended, either.

[GiudGiud]

@miaoyinb

[miaoyinb]

HexagonConcentricCircleAdaptiveBoundaryMeshGenerator is used to generate a mesh that contains assembly-style metadata, which can be used by PatternedHexMeshGenerator as input unit assembly mesh for a core mesh (generate_core_metadata = true). HexagonConcentricCircleAdaptiveBoundaryMeshGenerator also provides the "adaptive boundary" feature, but you do not have to use it.

Mesh generated by PolygonConcentricCircleMeshGenerator only contains pin-style metadata, so it cannot be used as an input unit assembly mesh.

[tannhorn]

Thank you for the answer. However, I am still not sure if I need to generate core_metadata when my core is only singly-heterogeneous (i.e. only a lattice of pins, rather than a lattice of assemblies which themselves comprise of lattices of pins).