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A grid is laid over a map of most of eastern Japan. Selecting a square in the grid zooms in on that area, at which point users can choose more detailed maps displaying airborne contamination levels, caesium-134 or -137 levels, or total caesium levels. Radiation maps [201]
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.
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.
Overview map showing evacuation and other zone progression and selected radiation levels. 05:30: In order to release some of the pressure inside the containment at unit 1, the decision is made to vent some of the steam (which contained a small amount of radioactive material) into the air, despite the risk of hydrogen (produced from the water in ...
Radiation hotspot in Kashiwa, February 2012 [65] Map of contaminated areas around the plant (22 March – 3 April 2011) [66] In response to the station blackout during the initial hours of the accident and the ongoing uncertainty regarding the cooling status of units 1 and 2, a 2 km radius evacuation of 1,900 residents was ordered at 20:50. [67]
TEPCO claimed no significant change in radiation levels, and the smoke subsided later the same day. [40] On 23 March, black smoke billowed from Unit 3, prompting another evacuation of workers from the plant, though Tokyo Electric Power Co. officials said there had been no corresponding spike in radiation at the plant.
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The Fukushima Daiichi Nuclear Power Plant (福島第一原子力発電所, Fukushima Daiichi Genshiryoku Hatsudensho, Fukushima number 1 nuclear power plant) is a disabled nuclear power plant located on a 3.5-square-kilometre (860-acre) site [1] in the towns of Ōkuma and Futaba in Fukushima Prefecture, Japan.