USEC’s subsidiary NAC International manages the Nuclear Materials Management and Safeguards System (NMMSS).
NMMSS is the U.S. government's information system containing current and historic data on the possession, use and shipment of nuclear materials. This centralized data base contains information collected from government and commercial nuclear facilities and provides output reports to those facilities and other interested parties, primarily U.S. government offices charged with the management and safeguarding of nuclear materials.
NAC has managed NMMSS since 1995. The U.S. Department of Energy awarded NAC a three-year contract extension to manage NMMSS in September 2005. The extension runs through September 30, 2008.
More information can be found on the NMMSS website.