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A Los Alamos report [1] recorded 60 criticality accidents between 1945 and 1999. These caused 21 deaths: seven in the United States, ten in the Soviet Union, two in Japan, one in Argentina, and one in Yugoslavia. Nine have been due to process accidents, and the others from research reactor accidents.
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 ...
15 October 1958: Vinča, Yugoslavia. There was a criticality incident in a newly installed reactor. Six young researchers received high doses of radiation, and were subsequently treated at "Kiri" institute in Paris where one of them died. [citation needed] 30 December 1958: Cecil Kelley criticality accident at Los Alamos National Laboratory ...
On 15 October 1958, there was a criticality accident at one of the research reactors. Six workers received large doses of radiation. One died shortly afterwards; [10] the other five received the first ever bone marrow transplants in Europe.
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. Peabody was exposed to 100 Gy (10,000 rad) of radiation and died two days later.
On May 7, 1999, during the NATO bombing of Yugoslavia (Operation Allied Force), five U.S. Joint Direct Attack Munition guided bombs hit the People's Republic of China embassy in Belgrade, killing three Chinese journalists of state-owned media and outraging the Chinese public. [2]
As he withdrew his hand, he inadvertently dropped the brick onto the center of the assembly. Since the assembly was nearly in the critical state, the accidental addition of that brick caused the reaction to go immediately into the prompt critical region of neutronic behavior. This resulted in a criticality accident. [6] [7]
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 ...