The site had three underground nuclear reactors using cooling water from the Yenisei river: AD (1958), ADE-1 (1961) and ADE-2 (1965). ADE-2 was shut down in 2010 in accord with the 1997 Plutonium Management and Disposition Agreement (Plutonium Production Reactor Agreement) with the United States. It also provided heat and electricity for the area, which was its main function after 1993.