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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 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 and radioactive iodine into the ...
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 ...
But the partial meltdown of TMI-2, the second reactor on the site, was the most serious nuclear accident in the history of U.S. commercial nuclear power. The reactor core overheated when its feed ...
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 of the reactor was lost. 10 fuel elements were slightly damaged before recovery.
Fukushima nuclear accident casualties. Satellite image on 16 March 2011 of the four damaged reactor buildings. Date. 11 March 2011. (2011-03-11) Location. Ōkuma, Fukushima, Japan. Coordinates. 37°25′17″N 141°1′57″E / 37.42139°N 141.03250°E / 37.42139; 141.03250.
It was a public relations disaster for the nuclear industry, and the industry's expansion tapered off, concluding in a 20-year spell in which no new nuclear reactors were built in the U.S.
The Chernobyl disaster 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 northern Ukraine, near the Belarus border in the Soviet Union. [1] It is one of only two nuclear energy accidents rated at the maximum severity on the International Nuclear Event Scale, the other ...