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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.
Criticality accidents are divided into one of two categories: Process accidents, where controls in place to prevent any criticality are breached;; Reactor accidents, which occur due to operator errors or other unintended events (e.g., during maintenance or fuel loading) in locations intended to achieve or approach criticality, such as nuclear power plants, nuclear reactors, and nuclear ...
August 1945: Criticality accident at US Los Alamos National Laboratory. Harry Daghlian dies. [62] May 1946: Criticality accident at Los Alamos National Laboratory. Louis Slotin dies. [62] 1950s. 13 February 1950: a Convair B-36B crashed in northern British Columbia after jettisoning a Mark IV atomic bomb. This was the first such nuclear weapon ...
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 ...
Los Alamos National Laboratory, Los Alamos, New Mexico, United States Accidental criticality A sketch of Louis Slotin's criticality accident used to determine exposure of those in the room at the time. While demonstrating his technique to visiting scientists at Los Alamos, Canadian physicist Louis Slotin manually assembled a critical mass of ...
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.
The criticality accident at the Tokai fuel fabrication facility. [42] Hundreds of people were exposed to radiation and two workers later died. This is not a nuclear power plant accident, however. [46] 2: 4 2002: Onagawa, Japan: Two workers were exposed to a small amount of radiation and suffered minor burns during a fire. [46] 0: 9 Aug 2004 ...
The event is the only known fatal reactor accident in the United States. [57] [58] The accident released about 80 curies (3.0 TBq) of iodine-131, [59] which was not considered significant due to its location in a remote desert of Idaho. About 1,100 curies (41 TBq) of fission products were released into the atmosphere. [60]