Nuclear chain reaction between being slightly subcritical and slightly delayed-supercritical, but must always remain below prompt-critical. It is impossible for a nuclear power plant to undergo a nuclear chain reaction that results in an explosion of power comparable with a nuclear weapon, but even low-powered explosions due to uncontrolled chain reactions, that would be considered "fizzles" in a bomb, may still cause considerable damage and meltdown in a reactor. For example, the Chernobyl disaster involved a runaway chain reaction but the result was a low-powered steam explosion from the relatively small release of heat, as compared with a bomb. However, the reactor complex
Cooling pond of up to 50 years in the area. The Columbia station in Pardeeville, Wisconsin is a coal fired power plant with a capacity of 1000 MW. A duel cooling system is used for heat rejection that consists of a cooling pond and two cooling towers. The pond and towers are connected in a parallel arrangement to help dissipate thermal energy at expedited rates. In 1994 North Korea's Yongbyon reactor was under U.S scrutiny and thus its nuclear fuel rods were taken out of the reactor and placed in the Yongbyon's cooling pond. They have since been removed. Cooling pond A