Idaho National Laboratory acting with two commercial partners, TerraPower and the Southern Company, is planning to conduct Molten Chloride Reactor Experiment (MCRE) as part of the Molten Chloride Fast Reactor project. According to the draft environmental assessment, MCRE will use more than 600 kg of HEU as fuel. While MCFR is projected to use high-assay LEU, the experiment will use HEU as a cost-saving measure.

The HEU for the experiment will come from the Zero Power Physics Reactor facility at Idaho Lab, and the Department of Energy will retain ownership of the material. The MCRE is expected to be completed in six months.