Under this Agreement, the United States and Russia agreed to commercially implement a 20-year program to convert 500 metric tons of HEU (uranium-235 enriched to 90 percent) taken from Soviet-era
warheads, into LEU (less than 5 percent uranium-235). The terms of the agreement required that it be implemented on commercial terms without government funds. The agreement named the
Department of Energy as the executive agent for the US side. The DOE appointed the newly privatized
United States Enrichment Corporation (USEC) as the commercial agent, its executive program contractor. The Russian Federation designated
Techsnabexport (TENEX), a commercial subsidiary of its
Ministry for Atomic Energy (Minatom), as the agent to implement the program on commercial terms. On January 14, 1994, the commercial contract between USEC and TENEX (HEU-LEU Contract) was signed. The terms also required that the HEU be converted by dilution (downblending) to LEU in Russian nuclear facilities. USEC would then purchase the low-enriched fuel and transport it to its facilities in the US. The first shipment of LEU took place in May 1995. The value of the process is in two components: the LEU Feed (feed component of natural uranium) and the work involved in the conversion process, measured as
separative work units (SWU). Both have separate commercial values. Early disagreements on interpretations of the terms of the governmental and commercial agreements on this issue led to controversy and some delays. Although each shipment contains LEU, the commercial nature of the global uranium market defines the uranium and the enrichment components as separate commercial values and costs. The solution reached was for USEC to continue payments for the SWU component it purchased and also to transfer the equivalent of the LEU feed component to the Russian side. In March 1999, Minatom and the US Department of Energy signed the Agreement Concerning the Transfer of Source Material to the Russian Federation (the Transfer Agreement), and at the same time TENEX signed a Contract with a Group of Western Companies (Cameco, Canada; Cogema, France; Nukem, Germany/US) regarding the purchase of the LEU Feed. As years passed, numerous commercial contract terms were renegotiated and revised to accommodate mutual interests. ==Summary of program==