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Whole-body counting of Fukushima residents after the TEPCO Fukushima Daiichi Nuclear Power Station accident
https://repo.qst.go.jp/records/54360
https://repo.qst.go.jp/records/543601e4b1515-847c-4167-81e4-620e6fdfe7f0
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-02-13 | |||||
| タイトル | ||||||
| タイトル | Whole-body counting of Fukushima residents after the TEPCO Fukushima Daiichi Nuclear Power Station accident | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Momose, Takumaro
× Momose, Takumaro× Takada, Chie× Nakagawa, Takahiro× Kanai, Katsuta× Kurihara, Osamu× et.al× 栗原 治 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | At the request of Fukushima Prefecture, the Japan Atomic Energy Agency (JAEA) started whole-body counting of residents on July 11, 2011 to assess radiation exposure after the TEPCO Fukushima Daiichi Nuclear Power Station accident. The JAEA has examined residents in Iitate, Kawamata, Namie, and 8 other local communities. The measurement capacity of the whole-body counting device is approximately 100 persons per day and the total number of people to measure reached 9,927 by the end of January 2012. Two types of whole body counters equipped with large-size NaI(Tl) detectors were used to perform the measurements. Routinely used phantoms (Canberra RMC-II transfer phantom or water-filled block phantom developed by JAEA) were used to perform peak efficiency calibration of the counters and the results of peak efficiency calibration were verified with different-sized bottle mannequin absorber (BOMAB) phantoms imitating an adult male, a 10-year-old and a 4-year-old. As the measurement started at 4 month after the accident, short half-life radionuclides such as 131I originating from the accident were not detected in this work. Approximately 80% of the residents had levels below the minimum detectable amount (MDA). No artificial nuclides other than 134Cs and 137Cs were found in the present whole-body counting. The maximum whole-body content of radiocesium (134Cs and 137Cs together) was 2.7 kBq for children <8 years and 14 kBq for adults. The 137Cs/134Cs activity ratios were approximately 1.12-1.26. Acute inhalation of radiocesium was assumed in the dose estimation for all residents measured by the end of January 2012. The committed effective dose (CED) of 99.8% of the residents was under 1 mSv. There were 25 people with CEDs >1 mSv, and the maximum CED was 3 mSv. The extrapolated 50th percentiles (medians) of the CED for 13-17 years old and those >17 years old were 0.02 mSv and 0.025 mSv, respectively. These values represent the basic knowledge for the reconstruction of internal exposure of the entire resident population. | |||||
| 書誌情報 |
NIRS Symposium on Reconstruction of Early Internal Dose in the TEPCO Fukushima Daiichi Nuclear Power Station Accident : Proceedings 巻 1, 号 NIRS-M-252, p. 67-82, 発行日 2012-12 |
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| 出版者 | ||||||
| 出版者 | National Institute of Radiological Sciences | |||||
