Workers have finished major pre-demolition work on a wartime building at Y-12 National Security Complex.

The deactivation work at the Beta-1 building included removing asbestos; old, brittle thorium-contaminated piping; and more than two million gallons of water.

The Oak Ridge Office of Environmental Management and its contractor UCOR have been working toward the deactivation milestone since 2020, a press release said. Workers finished deactivating the above-ground floors of the Beta-1 facility in December. Now, only deactivation work in the basement remains before the teardown can begin. Demolition of Beta-1 is expected to begin in 2026.

Beta-1 was built in 1944 to enrich uranium for the top-secret Manhattan Project during World War II. That federal project built the world’s first atomic bombs. Beta-1, a 210,000-square-foot, two-story building, was later converted to laboratory space for fusion-energy technology.

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