Corium (nuclear reactor) Corium (nuclear reactor) Corium (also called fuel containing material (FCM) or lava-like fuel containing material (LFCM)) is the lava-like mixture of fissile material created in a nuclear reactor's core during a nuclear meltdown. It consists of nuclear fuel, fission products, control rods, structural materials from the affected parts of the reactor, products of their chemical reaction with air, water and steam, and, in the event that the reactor vessel is breached, molten concrete from the floor of the reactor room. The heat causing the melting of a reactor may originate from the nuclear chain reaction, but more commonly decay heat
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