Hanford One
Although there have been dozens of unique nuclear reactors and nuclear power plants built and operated in the United States, it is perhaps true that the "most unique" of these in many ways was a nuclear power plant that, in a real sense, did not itself actually incorporate a nuclear reactor. This plant was built and operated by the Washington Public Power Supply System, and was known as Hanford One. The story behind it, and the unique reactor that provided steam for it, is at once complicated and fascinating.