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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 ...
After the 2011 Tōhoku earthquake and tsunami of 11 March, the cooling systems for three reactors (numbers 1, 2 and 4) of the Fukushima II (Fukushima Dai-ni) nuclear power plant were compromised due to damage from the tsunami. [9]
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 ...
Buenos Aires – 1983, criticality accident on research reactor RA-2 during fuel rod rearrangement killed one operator and injured two others. Tokaimura nuclear accident (Japan) – 1999, three inexperienced operators at a reprocessing facility caused a criticality accident; two of them died. [11]
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.
The Air Force grounded a set of Osprey aircraft after one of the planes crashed in waters off of Japan earlier this week, killing one and leaving seven still missing, officials said Friday.
At 20:05 JST on 12 March, the Japanese government ordered seawater to be injected into Unit 1 in a new effort to cool the reactor core. [60] The treatment had been held as a last resort since it ruins the reactor. [61] TEPCO started seawater cooling at 20:20, adding boric acid as a neutron absorber to prevent a criticality accident.
Most of Japan’s main public infrastructure was built during the rapid economic growth of the 1960s and 1970s. The sewage pipe in Yashiro is about 40 years old. For more CNN news and newsletters ...
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