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It’s fuel lasts for about 5 years. Other reactors also have re-fueling. In this case, refueling is done by digging up the reactor if needed and then having the manufacturer perform the refueling. In between there are no people operating the reactor because it is self-regulating. The manufacturer separates about a football size amount of material when taking the used fuel out.

It’s parts

is basically a hot tub full of uranium hydride with some hydrogen and some heat exchange rods.

The right tub of materials regulates itself while generating electricity