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EXTERNAL AND INTERNAL EXPOSURE TO FUKUSHIMA RESIDENTS.

K Kamiya1, T Ishikawa2, S Yasumura2

  • 1Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan kkamiya@hiroshima-u.ac.jp.

Radiation Protection Dosimetry
|July 31, 2016
PubMed
Summary

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Radiation exposure doses for residents following the Fukushima Daiichi Nuclear Power Plant Accident were assessed. Most individuals received low doses, with measurements comparable to estimations, though further dosimetry refinement is needed.

Area of Science:

  • Environmental Health
  • Nuclear Safety
  • Radiation Epidemiology

Background:

  • The 2011 Great East Japan Earthquake triggered the Fukushima Daiichi Nuclear Power Plant Accident.
  • Significant radioactive material release raised health concerns for affected residents.

Purpose of the Study:

  • To outline estimated and measured radiation exposure doses for residents post-Fukushima accident.
  • To compare different dosimetry methods and assess internal exposure levels.

Main Methods:

  • Analysis of data from the Fukushima Health Management Survey.
  • Dose assessment using personal dosemeter measurements and whole body counters.
  • Comparison of measured doses with estimations.

Main Results:

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  • Fukushima Health Management Survey: 66.3% received <1 mSv, 94.9% <2 mSv, 99.7% <5 mSv (max 25 mSv).
  • Whole body counter data: 99.986% received <1 mSv (max 3 mSv).
  • Measured doses were comparable to estimations; thyroid doses presumed lower than Chernobyl.

Conclusions:

  • The majority of residents experienced low radiation exposure doses after the Fukushima accident.
  • Personal dosimetry and whole body counting provided comparable results.
  • Ongoing efforts are necessary for precise dose assessment and understanding long-term health effects.