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A criticality accident occurred on December 30, 1958, at Los Alamos National Laboratory (LANL) in Los Alamos, New Mexico, in the United States It is one of 60 known criticality events that have occurred globally outside the controlled conditions of a nuclear reactor or test; though it was the third such event that took place in 1958 after events on June 16 [1] at the Y-12 Plant in Oak Ridge ...
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
The Tokaimura nuclear accidents refer to two nuclear related incidents near the village of Tōkai, Ibaraki Prefecture, Japan. The first accident occurred on 11 March 1997, producing an explosion after an experimental batch of solidified nuclear waste caught fire at the Power Reactor and Nuclear Fuel Development Corporation (PNC) radioactive ...
The two criticality accidents occurred at the Los Alamos Laboratory in New Mexico on August 21, 1945, and May 21, 1946. In both cases, an experiment was intended to demonstrate how close the core was to criticality with a tamper (layer of dense material surrounding the fissile material). Still, the core was accidentally put into a critical ...
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
From 1989 to 2017, seven accidents killed 41 service members and other passengers. From 2018 to 2021, there were no fatal crashes. In 2020 and 2021, there were two “Class A mishaps,” meaning ...
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.