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The radiation effects from the Fukushima Daiichi nuclear disaster are the observed and predicted effects as a result of the release of radioactive isotopes from the Fukushima Daiichii Nuclear Power Plant following the 2011 Tōhoku 9.0 magnitude earthquake and tsunami (Great East Japan Earthquake and the resultant tsunami).
Fukushima I and II Nuclear Accidents Overview Map showing evacuation and other zone progression and selected radiation levels. The Japanese reaction occurred after the Fukushima Daiichi nuclear disaster, following the 2011 Tōhoku earthquake and tsunami. A nuclear emergency was declared by the government of Japan on 11 March.
The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma, Fukushima, Japan, which began on 11 March 2011. The proximate cause of the accident was the 2011 Tōhoku earthquake and tsunami , which resulted in electrical grid failure and damaged nearly all of the power plant's backup energy ...
Arnold Gundersen, an engineer frequently commissioned by anti-nuclear groups, said that "Fukushima is the biggest industrial catastrophe in the history of mankind". [36] [37] However, current estimates of the total amount of radioactivity released from the 3 Fukushima Daiichi reactors is only 10–20% that from Chernobyl. [38]
On 25 March 2011, officials announced the reactor vessel might be breached and leaking radioactive material. High radiation levels from contaminated water prevented work. [53] Japan Nuclear and Industrial Safety Agency (NISA) reiterated concerns about a Unit 3 breach on 30 March. [54]
Japan began pumping more than a million metric tons of treated radioactive water from the destroyed Fukushima Daiichi nuclear power plant on Thursday, a process that will take decades to complete.
TEPCO was able to estimate radiation levels of 530 Sv/hr, the highest level measured since the March 2011 accident when the previous high was measured at 73 Sv/hr. [80] [81] [82] This does not represent an increase in radiation at the reactor, but rather is the first measurement taken in the containment vessel at this location. [83]
in areas with radiation levels above 20 millisievert per year, decontamination would be done step by step. within two years, radiation levels between 5 and 20 millisieverts should be cut down to 60%. the Japanese government would help local authorities with disposing of the enormous amount of radioactive waste. [108]