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PLoS One. 2015 Jun 8;10(6):e0129114. doi: 10.1371/journal.pone.0129114. eCollection 2015.

Assessment of the Annual Additional Effective Doses amongst Minamisoma Children during the Second Year after the Fukushima Daiichi Nuclear Power Plant Disaster.

Author information

1
Division of Social Communication System for Advanced Clinical Research, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan; Department of Radiation Protection, Minamisoma Municipal General Hospital, Minamisoma, Fukushima, Japan; Department of Radiation Protection, Soma Central Hospital, Soma, Fukushima, Japan.
2
Department of Radiation Protection, Soma Central Hospital, Soma, Fukushima, Japan.
3
Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, Norfolk Place, London, United Kingdom.
4
Division of Social Communication System for Advanced Clinical Research, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan.
5
Department of Radiation Protection, Minamisoma Municipal General Hospital, Minamisoma, Fukushima, Japan.

Abstract

An assessment of the external and internal radiation exposure levels, which includes calculation of effective doses from chronic radiation exposure and assessment of long-term radiation-related health risks, has become mandatory for residents living near the nuclear power plant in Fukushima, Japan. Data for all primary and secondary children in Minamisoma who participated in both external and internal screening programs were employed to assess the annual additional effective dose acquired due to the Fukushima Daiichi nuclear power plant disaster. In total, 881 children took part in both internal and external radiation exposure screening programs between 1st April 2012 to 31st March 2013. The level of additional effective doses ranged from 0.025 to 3.49 mSv/year with the median of 0.70 mSv/year. While 99.7% of the children (n = 878) were not detected with internal contamination, 90.3% of the additional effective doses was the result of external radiation exposure. This finding is relatively consistent with the doses estimated by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). The present study showed that the level of annual additional effective doses among children in Minamisoma has been low, even after the inter-individual differences were taken into account. The dose from internal radiation exposure was negligible presumably due to the success of contaminated food control.

PMID:
26053271
PMCID:
PMC4460119
DOI:
10.1371/journal.pone.0129114
[Indexed for MEDLINE]
Free PMC Article
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