Near Subei Mongolian Autonomous County, Gansu Province (near 94.58E/39.36N). Contains plutonium production, processing, and fabrication facilities. Completed in 1966. Two reprocessing facilities. Chemical separation plant. Military reprocessing facility.
The site is the location for:
NUCLEAR COMPONENT MANUFACTURING PLANTNuclear weapon core fabrication and final assembly/dismantlement. Called the "Pantex of China." Assembly of China's first hydrogen bomb. Fabrication of fissile materials (HEU and plutonium) into bomb cores.
- Assembly Workshop: Part of the Nuclear Component Manufacturing Plant. Final assembly/dismantlement of nuclear warheads, including non-nuclear components.
Production of uranium hexafluoride (UF6) since 11/63.
NUCLEAR FUEL PROCESSING PLANTConverts enriched uranium hexafluoride (UF6) to uranium tetrafluoride (UF4), and eventually to uranium metal.
PLUTONIUM PRODUCTION LINEIncludes: (1) the plutonium production reactor; (2) the plutonium separation (reprocessing) plant, and (3) the plutonium processing plant.
- Plutonium Production Reactor (Plant 404): The plutonium production reactor, sometimes called the Subei reactor, was finished and began operation in October 1966. The reactor was possibly re-engineered to a dual-use role during the mid-1980s. The reactor had an initial power of 250 MWth, which was doubled in the early 1980s. By the end of 1991, the reactor produced an estimated 1-2 tons of weapon-grade plutonium.
- Plutonium Separation (Reprocessing) Plant: Part of the Plutonium Production Line. Extracted plutonium metal from spent fuel. Used PUREX method. The plant became operational in April 1970.
- Plutonium Processing Plant: The plant refined plutonium metal for weapons.
[Sources: China Builds the Bomb, p. 111; Nuclear Weapons Databook, Volume 5, pp. 333, 339, 348; Risk Report, November 1995, p. 3; Tracking Nuclear Proliferation, p. 52; Frans Berkhout, Oleg Bukharin, Harold Feiveson, and Marvin Miller, "A Cutoff In The Production Of Fissile Material," International Security, Winter 1995/95, p. 178; "Nuclear Notebook," The Bulletin of the Atomic Scientists, May 1993, p. 49; Plutonium and Highly Enriched Uranium 1996, p. 76; Yan Kong, "China's Nuclear Bureaucracy," Jane's Intelligence Review, July 1993, p. 324; Lisbeth Gronlund, David Wright, and Yong Liu, "China And A Fissile Material Production Cut-Off," Survival, Winter 1995-96, p. 151.]
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