Reportedly located in the "oldest part" of the Yongbyon Nuclear Complex, construction of the plant was completed in 1983. However, the plant was closed in 1986 when the second fabrication facility became operational. This plant produced the fuel for the first core of the 5MWe reactor.[1] However, North Korean officials have not given International Atomic Energy Agency (IAEA) inspectors any technical information about the facility. IAEA inspectors have since described the plant as "largely abandoned."

Satellite images from June 2010 when compared with those taken on August 2009 showed a new roof on the building housing the Pilot-Scale Fuel Fabrication Plant. It is not known whether the entire building was renovated and for what purpose it plans to be used.[2]

Sources:
[1] Mark Hibbs, "North Korea Fabricating Fuel for Second, Larger Reactor," Nuclear Fuel, 17 January 1994, Vol. 19, No. 2, p. 9.
[2] Paul Brannan, "Additional Construction Activity at Yongbyon Nuclear Site,” ISIS Reports, Institute for Science and International Security, 10 June 2011, http://isis-online.org.