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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 ...
Criticality accident at Los Alamos National Laboratory in New Mexico with same plutonium bomb core as the Daghlian accident, known as the "demon core". 1 Harry Daghlian: 1945, August 21 Criticality accident at Los Alamos National Laboratory in New Mexico with a plutonium bomb core, known as the "demon core". 1 Cecil Kelley criticality accident
List of criticality accidents and incidents; List of nuclear meltdown accidents; List of military nuclear accidents; List of orphan source incidents; List of nuclear and radiation accidents and incidents; List of nuclear and radiation accidents by death toll; List of articles about the Three Mile Island accident
The Chernobyl accident is not universally regarded an example of a criticality accident, because it occurred in an operating reactor at a power plant. The reactor was supposed to be in a controlled critical state, but control of the chain reaction was lost. The accident destroyed the reactor and left a large geographic area uninhabitable.
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 ...
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 accident A worker at a United Nuclear Corporation fuel facility caused an accidental criticality. Robert Peabody, believing he was using a diluted uranium solution, accidentally put concentrated solution into an agitation tank containing sodium carbonate .
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 plutonium .