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Area of Science:

  • Environmental Science
  • Radiation Protection
  • Public Health

Background:

  • Fukushima Daiichi Nuclear Power Plant accident led to widespread evacuations.
  • Namie Town, a former evacuation zone, implemented a 'temporal stay' for residents.
  • Understanding radiation exposure is crucial for post-accident recovery and risk communication.

Purpose of the Study:

  • To assess external radiation doses experienced by residents during a temporal stay in Namie Town.
  • To investigate the correlation between residents' behavior and their measured personal dose equivalent.
  • To inform effective risk communication strategies for affected populations.

Main Methods:

  • Distribution of personal dosemeters to residents for measuring dose equivalent rate.
  • Collection of behavior record forms to correlate activities with radiation exposure.
  • Calculation of personal dose equivalent rate from hourly measurements.

Main Results:

  • The median personal dose equivalent rate was 0.12 μSv h-1.
  • Measured values ranged from 0.06 μSv h-1 (minimum) to 0.58 μSv h-1 (maximum).
  • Significant personal fluctuations in dose equivalent were observed, indicating behavioral influences.

Conclusions:

  • Resident behavior significantly influences personal radiation exposure levels.
  • Data on behavior and dose can enhance risk communication effectiveness.
  • Findings support tailored guidance for residents in areas affected by nuclear incidents.