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A nuclear and radiation accident is defined by the International Atomic Energy Agency (IAEA) as "an event that has led to significant consequences to people, the environment or the facility." Examples include lethal effects to individuals, large radioactivity release to the environment, or a reactor core melt. [ 6]
The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi nuclear power plant in Ōkuma, Fukushima, Japan which began on 11 March 2011. The proximate cause of the accident was the 2011 Tōhoku earthquake and tsunami , which resulted in electrical grid failure and damaged nearly all of the power plant's backup energy ...
The Chernobyl disaster [a] began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at seven—the maximum severity ...
Designated. March 25, 1999 [ 1] The Three Mile Island accident was a partial nuclear meltdown of the Unit 2 reactor (TMI-2) of the Three Mile Island Nuclear Generating Station on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania. The reactor accident began at 4:00 a.m. on March 28, 1979, and released radioactive gases ...
WR-1 Reactor at Pinawa, Manitoba, Canada. LOCA loss of coolant accident. 2,739 litres of coolant oil leaked, most of it into the Winnipeg River. The repair took several weeks for workers to complete. [ 23] 0. Unknown. August 1, 1983. Pickering nuclear Reactor 2, Pickering, Ontario, Canada. LOCA loss of coolant accident.
Nuclear meltdown. A simulated animation of a core melt in a light-water reactor after a loss-of-coolant accident. After reaching an extremely high temperature, the nuclear fuel and accompanying cladding liquefies and flows to the bottom of the reactor pressure vessel. Three of the reactors at Fukushima I overheated because the cooling systems ...
An accident involving yttrium-90 in nuclear medicine therapy caused 7 deaths. [12] [16] 5 Lost radiation source, Baku, Azerbaijan, USSR 1982, October 5 A caesium-137 orphan source was carried by an individual in a clothes pocket, exposing several individuals. Five people suffered radiation burns and died; at least one other person suffered ...
This image of the core from the SL-1 disaster, Idaho Falls, Idaho, USA, served as a reminder of the necessity for proper reactor practice and safeguards. The 18,000 km 2 expanse of the Semipalatinsk Test Site (indicated in red), in present-day Kazakhstan, covers an area the size of Wales. [2] These are lists of nuclear disasters and radioactive ...