Chernobyl
The Chernobyl Power Plant located outside the town of Pripyat, Ukraine (11 miles from the city of Chernobyl) began construction in the 1970s with the first reactor. Over the next few years three more reactors were added and two more were in the middle of construction at the time of the disaster. On April 26, 1986 at 1:23 a.m., the no. 4 reactor was shut down for maintenance. An experiment was being performed to test a safety emergency core cooling feature during the shut down procedure. It's uncertain as to what exact processes led to the explosions but a disruption in regulation seem to be a part of it. The first explosion was that of steam. Steam from the wrecked channels entered the reactor inner space that caused the destruction of the reactor casing, tearing off and lifting by the force of 2,000 tons the upper plate. This ruptured further fuel channels, the reactor core suffered total water loss and a high positive void coefficient could entirely appear.The second explosions...