Tomsk-7 Chemical
Combine (Renamed: Seversk). 
Plutonium production; uranium enrichment; past
production of plutonium warhead components; storage of plutonium triggers from dimantled
warheads, oxidation of HEU metal from dismantled warheads.
Yes; some 70 tons of
plutonium has been produced at Tomsk over its lifetime.
Yes.
Unsafeguarded.
The three least safe of five graphite-moderated,
plutonium production reactors have been shut down. The two operating 2500 MWt
light water-cooled, graphite-moderated production reactors (ADE-4 & ADE-5) are to
be closed by the year 2000. These two reactors are the towns' only source of
heat. A pond-type research reactor (IRT-T) at the Institute of Nuclear Physics at
Tomsk is fueled with approximately 4 kg of 90% enriched HEU. Plutonium
separation (reprocessing) activities continue and re-enriched uranium may be
exported from this site. Over its lifetime, Tomsk-7 has produced as much at 70
tons of weapons-grade plutonium.
In addition, approximately 23,000
canisters, each containing 1-4 kg of fissile material from disassembled nuclear
weapons, are located at Tomsk pending more secure storage. Each canister
contains one of the following: about 1.5 kg of plutonium metal, about 2 kg of
plutonium oxide, or 3-4 kg of uranium in metal or oxide form. Most of the
canisters have been on-site since 1991, and no additional fissile materials have
been received for storage since April 1992 because of to a lack of space. There are no
specially built and equipped storage facilities for these materials.
In
September 1995, U.S. personnel visited a number of facilities at Tomsk-7 as part
of the plutonium reactor shutdown agreement.
