LWR Assembly

[nuclearkevin]

Reason

LWR geometries have large aspect ratios which pose a challenge for the development of AMR strategies. A single-physics benchmark case should be developed to allow for the testing of Monte Carlo adaptive mesh refinement against these geometries in a thermal neutron spectrum.

Design

The model should include:

• A python script which generates OpenMC xml input files for a LWR assembly;
• A mesh input file which generates a coarse mesh that accurately represents the underlying CSG geometry without considering the spatial distribution of tallies;
• A OpenMC input file which runs the OpenMC cases and maps the fission heat source and neutron flux to the mesh mirror with a mesh tally.

Impact

Allows for the testing of AMR strategies against LWR geometries with an increase in complexity compared to the pincell case.