USEC Inc. (NYSE: USU) today named Steven R. Penrod, 57, vice president of the American Centrifuge program (ACP), succeeding Paul E. Sullivan, 62, who leaves the post to become director of the Applied Research Laboratory at the Pennsylvania State University, effective September 1. Penrod currently serves as USEC vice president of enrichment operations and has been responsible for USECs facilities in Paducah, Ky
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