LOUISVILLE, Ky. (AP) — The company that operated nuclear plants in Kentucky and Ohio is suing the U.S. Department of Energy, claiming the federal government owes it almost $38 million in unpaid fees for decontamination work.

United States Enrichment Corporation claims the federal government failed to properly reimburse the company for work it did under contract at the gaseous diffusion plants in Paducah, Ky., and Pikeston, Ohio, from 2003 through 2011.