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In the first week of September the Ministry of Science published a new map showing radiation levels in Fukushima and four surrounding prefectures, based on the results of an aerial survey. In the map, different colors were used to show the level of radiation at locations one meter above the ground. Red: 19 microsieverts per hour or higher.
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 ...
No radiation-related deaths or acute diseases have been observed among the workers and general public exposed to radiation from the accident (Chapter II A(b) paragraph 38). Adults living in the city of Fukushima were estimated to have received, on average, an effective dose of about 4 mSv (Chapter II A(a) paragraph 30).
Prior to Fukushima, the Chernobyl disaster was the only level 7 accident on record, while the Three Mile Island accident was a level 5 accident. Arnold Gundersen, an engineer frequently commissioned by anti-nuclear groups, said that "Fukushima is the biggest industrial catastrophe in the history of mankind".
The Fukushima Daiichi nuclear accident was originally rated as INES 5, but then upgraded to INES 7 (the highest level) when the events of units 1, 2 and 3 were combined into a single event and the combined release of radiological material was the determining factor for the INES rating. [43]
The radiation level measured was 72.9 sieverts per hour. Because of this, the endoscope could only function for a few hours. For reactors number 1 and 3, no endoscopic survey was planned at that time, because the actual radiation levels were too high for humans. [34] [dead link ] [35] [36]
Cindy Folkers is the radiation and health hazard specialist at the NGO Beyond Nuclear, and co-author with Ian Fairlie of the new book “The Scientists who Alerted us to the Dangers of Radiation.”
Prime Minister Kishida visiting the Fukushima plant in August 2023; Kishida's government continued with the planned water discharge. On 22 August 2023, Japan announced that it would start releasing treated radioactive water from the tsunami-hit Fukushima nuclear plant into the Pacific Ocean in 48 hours, despite opposition from its neighbours.