“…Previous molten halide irradiations have been conducted both as static (non-flowing) capsules (1), (2), (3), (4), in pumped loops (5), and in natural convection loops. In one case, a Russian natural convection loop was used in conjunction with an internal heating element for startup (6), (7), and in another instance a natural convection loop was operated with external heaters at the Oak Ridge Research Reactor (8).…”