Where is uranium hexafluoride stored in the United States?

Most of the depleted UF₆ accumulated since the 1940s is stored at the locations where it was produced as a product of the gaseous diffusion enrichment process. These locations are the gaseous diffusion plants near Paducah, Kentucky, and Portsmouth, Ohio, and at the East Tennessee Technology Park (ETTP) (formerly the K-25 Site) at the Oak Ridge Reservation in Oak Ridge, Tennessee.

The UF₆ at the three sites is stored in cylinders in large outdoor areas called "cylinder yards." The total area of the storage yards at all three sites is about 4.3 million square feet, or about 100 acres. This is about equal to 100 football fields.

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