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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, caused by a persistent leak of borated water The Hanford Site, in Benton County, Washington, USA, represents two-thirds of America's high-level radioactive waste by volume.
Nuclear power accidents in Germany [7] [34] Date Location Description Fatalities Cost (in millions 2006 US$ million) INES 1975: Greifswald, East Germany: A near core meltdown at Greifswald Nuclear Power Plant: Three out of six cooling water pumps were switched off for a failed test. A fourth pump broke down by loss of electric power and control ...
Alternately, an external fire may endanger the core, leading to a meltdown. Large-scale nuclear meltdowns at civilian nuclear power plants include: [13] [62] the Three Mile Island accident in Pennsylvania, United States, in 1979. the Chernobyl disaster at Chernobyl Nuclear Power Plant, Ukraine, USSR, in 1986.
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 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]
There was also a partial meltdown at the Enrico Fermi Nuclear Generating Station in Michigan in 1966. [5] The large size of nuclear reactors ordered during the late 1960s raised new safety questions and created fears of a severe reactor accident that would send large quantities of radiation into the environment.
Nuclear projects have been subject to stringent regulations in response to high-profile global nuclear meltdowns at Three Mile Island in 1979, Chernobyl in 1986, and Fukushima in 2011.
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.It happened on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania.