• A fire at the Y-12 National Security Complex in Oak Ridge, Tennessee occurred in a uranium processing building, which was constructed in 1945.
  • The Y-12 facility was where research and development on the atom bomb started.
  • The fire was contained and there were no reports of injury or contamination.

There’s always a little extra level of concern when a fire breaks out at a uranium production facility that served as the home for research and development for the atom bomb during the 1940s. But don’t fret: Wednesday’s fire at the Y-12 National Security Complex in Oak Ridge, Tennessee, appears to have been put out successfully and without injury or contamination.

The fire occurred in Building 9212. Constructed in 1945, this building continues to serve as “one of the primary chemical processing and enriched uranium production facilities at Y-12.” The building was the location of the first production of uranium metal at Y-12 and part of the earliest nuclear weapons production.

Wednesday’s fire involved a metal compound of uranium, but within a few hours, the evacuation of the site ended and business had returned to normal throughout the remainder of the complex.

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Y-12 was established as part of the Manhattan Project in 1943 and produced the first nuclear weapons for the United States. This “Secret City” housed roughly 50,000 workers in the 1940s and was not placed on maps during that era to keep the operation under wraps.