18 March 2011

Reality check: Facts about the threat posed by radiation from the Fukushima Daiichi plant

  • People are exposed to an average of 3.0 mSv/year.
  • People have a normal radiation acceptance level of 20 mS/year.
  • On 17 March at 10am, helicopters measured 87.7 mSv/h at 90 m and 4.13 mSv/h at 300 m above the Daiichi plant.
  • Other measurements of radiation levels taken within ~60 km of the Daiichi plant ranged from 0.7 to 170 μSv/h on 17 March.


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