USEC, Inc., supplies low-enriched uranium (LEU) for commercial nuclear power plants worldwide.  The company also performs contract work for the U.S. Department of Energy (DOE)  at the Paducah and Portsmouth plants, including maintaining the Portsmouth gaseous-diffusion plant in a state of readiness or cold standby, processing out-of-specification uranium and providing infrastructure support services. In addition, USEC provides services in the design, fabrication and implementation of technologies for spent nuclear fuel and transportation of nuclear materials, as well as consulting services for the nuclear fuel cycle.