Approximately 704,000 metric tons of depleted UF₆ is stored in about 57,600 steel cylinders at three sites in the U.S.:

• Paducah, KY
• Portsmouth, OH
• Oak Ridge, TN

Depleted UF₆ is stored in steel cylinders that hold 9 - 12 metric tons of depleted UF₆. The cylinders are stored in large outdoor areas called "cylinder yards."

A program of regular surveillance and maintenance activities assures the safety of continued cylinder storage.

More information about depleted UF₆ management responsibilities.