In 1963 the All-Union Amalgamation "Machinoexport" of the USSR Ministry of Foreign Trade created the All-Union Bureau "Techsnabexport" to control imports and exports of radioactive and stable isotopes, rare earth metals, and equipment that employs radioactive substances for industrial processes or scientific measuring. [1] In 1994 the Joint Stock Company Techsnabexport was created as a privatized successor that retains the assets, rights and contracts of the state bureau.

It operates as the primary Russian exporter of nuclear fuel, nuclear technologies, raw uranium, and other products of the nuclear fuel cycle. TENEX also engages in uranium conversion services and is involved in both the import and export of enrichment technology and high tech lab equipment. [2] TENEX arranges sales and production, while other Rosatom subsidiaries carry out production.
 
TENEX operates a domestic nuclear transport and medical isotope delivery company "Saint-Petersburg IZOTOP," and five wholly owned subsidiary corporations worldwide: "Internexco GmbH" in Germany; "TENEX-Korea Co., Ltd." in the Republic of Korea; "TENEX-Japan Co." in Japan; "Tradewill Limited" in the United Kingdom; and the "TENAM Corporation" in the United States. [3]

Since 1994, TENEX has operated as the exclusive partner with the United States Enrichment Cooperation (USEC) in the "Megatons to Megawatts" program which converts the fissile material in decommissioned Russian nuclear warheads into low enriched uranium (LEU) fuel rods for U.S. nuclear power plants. [4]

Sources:
[1] "История" [History], TENEX website, undated, www.tenex.ru (accessed 09 November 2012).
[2] "Company Overview of JSC Techsnabexport", Businessweek Investing, updated 13 November 2012, investing.businessweek.com (accessed 13 November 2012).
[3] "Основные дочерние компании" [Principal Subsidiaries], TENEX website, undated, www.tenex.ru (accessed 13 November 2012).
[4] "Megatons to Megawatts", USEC website, undated, www.usec.com (accessed 13 November 2012).