MSFR Core Slice

[nuclearkevin]

Reason

Molten salt fast reactors combine long mean free paths with complex geometries that are unusual when compared to conventional LWR lattices or HTGR compacts. These geometries may pose a challenge for AMR methods, and so a single-physics benchmark problem should be developed to allow for the testing of Monte Carlo adaptive mesh refinement against a simplified MSFR unit cell.

Design

The model should include:

• A DAGMC geometry file for a slice of a MSFR core containing a single heat exchanger;
• A python script which generates OpenMC xml input files that use a DAGMC universe for the model geometry;
• An exodus mesh file for the OpenMC mesh mirror;
• 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 a simplified MSFR geometry.