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Office of Environmental Management
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Office of Environmental Management
July 1955

On July 17, 1955, Arco, Idaho became the first U.S. town to be powered by nuclear energy. The demonstration lasted for one hour in the 1,350-person community. The National Reactor Testing Station, now called the Idaho National Engineering Laboratory, supplied the power from its Borax-III reactor. It was part of the Atomic Energy Commission's (AEC) Five-Year Reactor Development Program in the mid-1950's. The AEC tested five types of experimental reactors. The Borax-III was an early prototype of a boiling water reactor, a type of reactor which still produces electricity for utilities today.

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