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A nuclear meltdown (core meltdown, core melt accident, meltdown or partial core melt [2]) is a severe nuclear reactor accident that results in core damage from overheating. The term nuclear meltdown is not officially defined by the International Atomic Energy Agency [3] or by the United States Nuclear Regulatory Commission. [4]
The Kashiwazaki-Kariwa Nuclear Power Plant, in Niigata Prefecture, Japan, the world's largest single nuclear power station, was completely shut down for 21 months following an earthquake in 2007. [1] Erosion of the 150-millimetre-thick (5.9 in) carbon steel reactor head at Davis-Besse Nuclear Power Plant , in Oak Harbor, Ohio, USA , in 2002 ...
The 1979 Three Mile Island accident in Pennsylvania was caused by a series of failures in secondary systems at the reactor, which allowed radioactive steam to escape and resulted in the partial core meltdown of one of two reactors at the site, making it the most significant accident in U.S. history. [8] The world's worst nuclear accident has ...
This was the first such nuclear weapon loss in history. 12 December 1952: NRX AECL Chalk River Laboratories, Chalk River, Ontario, Canada. Partial meltdown, about 10,000 Curies released. [63] Approximately 1202 people were involved in the two-year cleanup. [64] Future president Jimmy Carter was one of the many people that helped clean up the ...
Globally, there have been at least 99 (civilian and military) recorded nuclear reactor accidents from 1952 to 2009 (defined as incidents that either resulted in the loss of human life or more than US$50,000 of property damage, the amount the US federal government uses to define major energy accidents that must be reported), totaling US$20.5 billion in property damages.
The Windscale fire resulted when uranium metal fuel ignited inside plutonium production piles; surrounding dairy farms were contaminated. [33] [34] The severity of the incident was covered up at the time by the UK government, as Prime Minister Harold Macmillan feared that it would harm British nuclear relations with America, and so original reports on the disaster and its health impacts were ...
A wall of water over 15 meters (50 feet) tall slammed into the coastal Fukushima Daiichi nuclear power plant, destroying its power supply and cooling systems, triggering meltdowns in three of its ...
The Soviet nuclear submarine K-129 sank with a crew of 98 due to an explosion of unknown cause. The International Atomic Energy Agency stated that two nuclear warheads from K-129 were located in the Pacific 1,230 miles from Kamchatka at coordinates 40°6'N and 179°57'E at a depth of 6,000 metres (20,000 ft), and lists them as recovered. May 22 ...