In FIG. 22, the reflectors 2208A, 2208B, 2208C are in fluid communication allowing liquid reflector material to be circulated around the reactor core 2204. Flow of the reflector material is illustrated in FIG. 22 by the large, gray arrows 2234. In the embodiment shown, reflector material flows through an inlet in the vessel head 2238 into reactor 2200 along the interior surface of the containment vessel 2218 and then along the bottom of the containment vessel 2218 before rising and making a U-turn to flow adjacent to the bottom of the reactor core 2204. The reflector material then flows up through the inner reflector 2208C then into the upper reflector 2208A from which it can be removed via an outlet in the vessel head 2238 or recirculated to the interior surface of the containment vessel 2218.
