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Title: An influential factor for external radiation dose estimation for residents after the Fukushima Daiichi Nuclear Power Plant accident-time spent outdoors for residents in Iitate Village
Authors: Ishikawa, Tetsuo
Yasumura, Seiji
Ohtsuru, Akira
Sakai, Akira
Akahane, Keiichi
Yonai, Shunsuke
Sakata, Ritsu
Ozasa, Kotaro
Hayashi, Masayuki
Ohira, Tetsuya
Kamiya, Kenji
Abe, Masafumi
Affiliation: 放射線医学県民健康管理センター
放射線物理化学講座
公衆衛生学講座
放射線健康管理学講座
放射線生命科学講座
疫学講座
Source title: Journal of radiological protection
Volume: 36
Issue: 2
Start page: 255
End page: 268
Issue Date: Jun-2016
Abstract: Many studies have been conducted on radiation doses to residents after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Time spent outdoors is an influential factor for external dose estimation. Since little information was available on actual time spent outdoors for residents, different values of average time spent outdoors per day have been used in dose estimation studies on the FDNPP accident. The most conservative value of 24 h was sometimes used, while 2.4 h was adopted for indoor workers in the UNSCEAR 2013 report. Fukushima Medical University has been estimating individual external doses received by residents as a part of the Fukushima Health Management Survey by collecting information on the records of moves and activities (the Basic Survey) after the accident from each resident. In the present study, these records were analyzed to estimate an average time spent outdoors per day. As an example, in Iitate Village, its arithmetic mean was 2.08 h (95% CI: 1.64-2.51) for a total of 170 persons selected from respondents to the Basic Survey. This is a much smaller value than commonly assumed. When 2.08 h is used for the external dose estimation, the dose is about 25% (23-26% when using the above 95% CI) less compared with the dose estimated for the commonly used value of 8 h.
Publisher: IOP Publishing
language: eng
URI: http://ir.fmu.ac.jp/dspace/handle/123456789/1576
Full text URL: http://ir.fmu.ac.jp/dspace/bitstream/123456789/1576/1/RadiolProt_36_p255.pdf
ISSN: 0952-4746
1361-6498
DOI: 10.1088/0952-4746/36/2/255
PubMed ID: 27034103
Other version: https://doi.org/10.1088/0952-4746/36/2/255
Rights: © 2016 IOP Publishing Ltd. This is the Accepted Manuscript version of an article accepted for publication in "Journal of Radiological Protection". IOP Publishing Ltd is not responsible for any errors oromissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/0952-4746/36/2/255.
Appears in Collections:a10 学術雑誌論文等 = Journal Article
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RadiolProt_36_p255.pdf781.28 kBAdobe PDFDownload

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