The Chernobyl disaster

The Chernobyl disaster, also referred to as the Chernobyl accident, was a catastrophic nuclear accident. The disaster occurred at 01.23 am on Saturday, April 26 1986 when the fourth reactor at the Chernobyl power plant near the now-abandoned town Pripyat, in northern Ukrainian Soviet Socialist Republic, Soviet Union, approximately 104 km north of Kiev. There was a sudden power output surge, and when an emergency shutdown was attempted, a more extreme spike in power output occurred, which led to a reactor vessel rupture and a series of explosions. These events exposed the graphite moderator of the reactor to air,
causing it to ignite. A large amount of fire released radioactive contamination into the atmosphere and spread across USSR and Europe. This accident was due to both human error and design flaw The disaster was a unique industrial accident because of the scale of its social, environmental and economic impacts.