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Normal radiation dose rates at the Fukushima I site as established by the stream of monitoring post readings in the 3 months preceding the accident. (03/01=1 March 2011, 1 Gray= 1 Sv for gamma radiation) [98] Radiation fluctuated widely on the site after the tsunami and often correlated to fires and explosions on site.
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.
The head of the U.N. atomic agency observed firsthand the Fukushima Daiichi nuclear power plant's ongoing radioactive wastewater discharges for the first time since the contentious program began ...
Radiation levels in Japan are continuously monitored in a number of locations, and a large number stream their data to the internet. Some of these locations are mandated by law for nuclear power plants and other nuclear facilities.
In December 2011, as Japan completed "step 2" of its control roadmap at Fukushima, U.S. NRC chairman Jaczko visited the plant and said afterwards "that there was no longer enough energy in the reactors at the crippled Fukushima No. 1 Nuclear Power Plant to produce an offsite release of radiation, but pointed out that a large cleanup task remained".
Estimated effective doses outside Japan are considered to be below (or far below) the levels regarded as very small by the international radiological protection community. [134]: 43 [143] Canadian academic studies failed to show any significant amount of radiation in the coastal waters off Canada's west coast. [143]
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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]