Comment by ok_dad

> Check out Hyman Rickover, a proponent of a nuclear Navy that pushed members of Congress to vote mothball 10 years of thorium reactor research for uranium reactors so they had weapons material.

The thorium reactors at that time were molten salt. Molten salts used react very poorly with water. Uranium reactors are generally pressurized water. You might imagine another reason Admiral Rickover might have preferred the uranium solution?