Arzamas-16 (Kremlev);
(Renamed: Sarov)
Site of All-Russian Scientific Research Institute of
Experimental Physics (VNIIEF). 
Warhead design; final warhead assembly and dismantlement.
Yes
At least 510 kg of HEU enriched to between
85-90% (research reactor fuel).
Unsafeguarded.
Arzamas-16 is a MINATOM nuclear weapons facility. The US-Russia lab-to-lab
program has demonstrated a model material control and accounting system at
Arzamas-16. The lab-to-lab program has also deployed nuclear portal monitors at
Arzamas 16.
Historical background on Arzamas:
"The primary mission
of Arzamas-16 has been to design nuclear warheads. The institute fabricates
experimental and prototype warheads. Some factory production probably took
place at Arzamas-16 in the early years. Komsomolskaya Pravda described the work
of an "engineer fitter" who worked in a shop of about 30 people engaged in the
final assembly of bomb and missile warheads. He claimed to have assembled
several thousand nuclear warheads over a fourteen-year period. Minatom Minister
Mikhailov in 1992 identified Arzamas-16 as one of four facilities for the
assembly and disassembly of warheads. This suggests that the production capacity
at Arzamas-16 may be as much as several hundred warheads per year." --Excerpted
from Making the Russian Bomb-from Stalin to Yeltsin by Thomas B. Cochran, Robert
S. Norris, and Oleg A. Bukharin, Westview Press, San Francisco.
