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Radiation levels in Tokyo on 15 March were at one point measured at 0.809 μSv/hour although they were later reported to be at "about twice the normal level". [203] [204] Later, on 15 March 2011, Edano reported that radiation levels were lower and the average radiation dose rate over the whole day was 0.109 μSv/h. [203]
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.
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]
Watch a view of Japan's Fukushima nuclear power plant on Friday, 25 August, as it begins to discharge treated radioactive water into the Pacific Ocean. A massive earthquake and tsunami caused ...
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 ...
[16] [17] When water levels continued to fall and pressure to rise, the injected water was switched to seawater at 13:12. [12] By 15:00 it was noted that despite adding water the level in the reactor did not rise and radiation had increased. [18] A rise was eventually recorded but the level stuck at 2 m below the top of reactor core.
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. [33] [dead link ] [34] [35]
The plaintiffs, now aged 17 to 27 years, are demanding a total of 616 million yen ($5.4 million) from the Tokyo Electric Power Company Holdings, which runs the the Fukushima nuclear plant.