USEC Inc. (USEC) is a global energy company, is a supplier of low enriched uranium (LEU) for commercial nuclear power plants. The Company operates in two segments: the low enriched uranium (LEU) segment with two components, separative work units (SWU) and uranium, and the contract services segment. The LEU segment is its primary business focus and includes sales of the SWU component of LEU, sales of both SWU and uranium components of LEU, and sales of uranium. The contract services segment includes work performed for Department of Energy (DOE) and its contractors at Portsmouth and Paducah, as well as nuclear energy services and technologies provided by NAC International Inc. (NAC). The Company supply LEU to both domestic and international utilities for use in about 150 nuclear reactors worldwide. The Company enriches uranium at the Paducah gaseous diffusion plant (GDP) that it leases from the United States DOE.