b'Figure 1. JAEA collaborator visits INL for final execution steps of a JAEA-INL joint experiment at TREAToptions, and robustness to test somebar heatsink. The simplicity of the of the most challenging environ- capsule was strategically selected ments on the planet. The centralto complement the more complex feature of the THOR capsule is acapability of the developing TREAT plain bar of metal, carefully selectedsodium loop. Figure 2 shows an to provide optimized heat transferoverview of the capsule design from a test specimen located inhighlighting critical components.a centerline through-hole in the 2023|AFC ACCOMPLISHMENTS 15'