BETHESDA, Md. - James R. Mellor, Chairman of theBoardof USEC Inc. (NYSE:USU), announced today the retirement of Frank Cahouet as a member of the Board.Mr. Cahouet has been a member of the USEC Board since the privatization of the company by the federal government in July 1998. His resignation is effective January 15.

In making the announcement, Mr. Mellor said, "Frank has been a valued member of the Board, and all of us join in wishing him well."

Mr. Cahouet recently retired from the posts of President, Chairman and Chief Executive Officer of Mellon Bank Corporation.

USEC Inc. is the world leader in the sale of uranium fuel enrichment services for commercial nuclear power plants. A global energy company, USEC has its headquarters in Bethesda, Maryland, and operates production plants in Kentucky and Ohio.

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