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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.
Fukushima 50 is a pseudonym given by English-language media to a group of employees at the Fukushima Daiichi Nuclear Power Plant. Following the TÅhoku earthquake and tsunami on 11 March 2011, a related series of nuclear accidents resulted in melting of the cores of three reactors.
English: Radiation Dose Chart by Randall Munroe as part of the webcomic xkcd (SVG version of ). In response to concerns about the radioactivity released by the Fukushima Daiichi nuclear disaster:Fukushima Daiichi nuclear disaster in 2011, and to remedy what he described as "confusing" reporting on radiation levels in the media, Munroe created a chart of comparative radiation exposure levels.
05:50: Fresh water injection into reactor 1 is started. [15] 06:50: Although unknown at the time, the core of reactor 1 has now completely melted and falls to the bottom of the reactor pressure vessel. [15] 10:09: TEPCO confirms that a small amount of vapor has been released into the air to release pressure in reactor unit 1 at Fukushima I. [19]
Only a minimum crew of 50 men, also referred to as the Fukushima 50, was left at the site. [25] Soon after, radiation equivalent dose rates had risen to 8.2 mSv/h [26] around two hours after the explosion and again down to 2.4 mSv/h, shortly after. [27] Three hours after the explosion, the rates had risen to 11.9 mSv/h. [28]
Cancer deaths due to accumulated radiation exposures cannot be ruled out, and according to one expert, might be in the order of 100 cases. [12] A May 2012 United Nations committee report stated that none of the six Fukushima workers who had died since the tsunami had died from radiation exposure. [78]
As aftershocks rock the Fukushima nuclear plant, a small band of workers defy their bosses to stay on and fight to stop an even bigger disaster from irradiating a wide swathe of Japan. The scene ...
In October 2011 the Japanese ministry of Science launched a telephone hotline to deal with public concerns about radiation exposure in areas outside Fukushima Prefecture. Concerned Japanese citizens had taken up a new hobby: walking with Geiger-counters through their city or village in search for all places with raised radiation levels.