著者

岩岡 和輝 米原 英典

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.59, no.12, pp.733-739, 2010 (Released:2010-12-29)

参考文献数

41

被引用文献数

1 1

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タバコに含まれる210Poや210Pbは喫煙の燃焼によって揮発して人体に取り込まれるため,喫煙者はこれら核種によって被ばくする。本稿では,喫煙者の線量評価に関する様々なパラメータのレビューを行い,それらのデータから喫煙者の年間実効線量を評価した。喫煙者の年間実効線量はおよそ0.2mSv y-1であり,商品の輸出入の際に用いられるICRP Publ.82の介入免除レベル(1mSv y-1)よりも低かった。

著者

細田 正洋 井上 一雅 岡 光昭 大森 康孝 岩岡 和輝 床次 眞司

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.51, no.1, pp.27-40, 2016 (Released:2016-07-06)

参考文献数

55

被引用文献数

1

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Many nuclear facilities are located in Aomori Prefecture, Japan. However, no detailed dose rate distribution map of Aomori Prefecture, including its mountain regions has been reported since the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Thus, a car-borne survey which used a 3-in × 3-in NaI(Tl) scintillation spectrometer was done throughout the prefecture for the purposes of making a dose distribution map and estimating the annual external dose. These results have been published in the same issue of this journal. On the other hand, many researchers have performed car-borne surveys in Fukushima Prefecture after the FDNPP accident. In this paper, the methods of car-borne survey of the present author are explained in detail. 1) The relationship between the total counts per minute of a gamma-ray pulse height distribution and an absorbed dose rate in air is examined for the estimation of dose rate conversion factor. 2) The relationship between count rates outside and inside the car is examined for the estimation of the shielding factor by car body. 3) The uncertainties to the counts inside the car, the dose rate conversion factor and the shielding factor are evaluated according to the Guide to the Expression of Uncertainty in Measurement published by the Joint Committee for Guides in Metrology. 4) The gamma-ray pulse height distributions are unfolded using a 22 × 22 response matrix for the analysis of activity concentrations in soil of 40K, 238U and 232Th and the contributions of their nuclides to absorbed dose rate in air. 5) The distribution map of absorbed dose rate in air of Aomori Prefecture is drawn using the Generic Mapping Tool which was developed by Hawaii University.

著者

床次 眞司 細田 正洋 岩岡 和輝 工藤 ひろみ

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.50, no.1, pp.11-19, 2015 (Released:2015-12-18)

参考文献数

24

被引用文献数

2 5

著者

工藤 ひろみ 床次 眞司 細田 正洋 岩岡 和輝 葛西 幸彦

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.51, no.2, pp.92-97, 2016 (Released:2016-08-09)

参考文献数

13

被引用文献数

2

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On 11 March 2011, a 9.0 magnitude earthquake, which occurred at Northern Japan, and subsequent tsunami caused serious damage to the Fukushima Daiichi Nuclear Power Station (FDNPS). People living within a radius of 30 km were evacuated from their homes. Residents of Namie Town stayed for several days at a location 30 km northwest of the FDNPS. However, as a highly concentrated radioactive plume passed over this location, the evacuees are very much worried about their radiation exposure. On the other hand, there are several nuclear facilities in Aomori Prefecture. Such circumstances may produce concerns among people regarding an increased risk of cancer or other radiation-induced disease. In this study, focusing on the citizens of Namie Town and Aomori Prefecture (Hirosaki, Aomori and Hachinohe Cities), their understanding of basic knowledge on radiation was investigated through anonymous questionnaires. The present study has revealed that people recognized that they are exposed to natural radiation of more than 1 mSv, Despite this fact, however, people in Namie Town believe even radiation of 1 mSv will cause them some biological effects. Although basic general knowledge on radiation should be provided, a reliable relationship between the general public and experts also needs to be established.

著者

工藤 ひろみ 床次 眞司 細田 正洋 岩岡 和輝 葛西 幸彦

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.51, no.2, pp.92-97, 2016

被引用文献数

2

---

On 11 March 2011, a 9.0 magnitude earthquake, which occurred at Northern Japan, and subsequent tsunami caused serious damage to the Fukushima Daiichi Nuclear Power Station (FDNPS). People living within a radius of 30 km were evacuated from their homes. Residents of Namie Town stayed for several days at a location 30 km northwest of the FDNPS. However, as a highly concentrated radioactive plume passed over this location, the evacuees are very much worried about their radiation exposure. On the other hand, there are several nuclear facilities in Aomori Prefecture. Such circumstances may produce concerns among people regarding an increased risk of cancer or other radiation-induced disease. In this study, focusing on the citizens of Namie Town and Aomori Prefecture (Hirosaki, Aomori and Hachinohe Cities), their understanding of basic knowledge on radiation was investigated through anonymous questionnaires. The present study has revealed that people recognized that they are exposed to natural radiation of more than 1 mSv, Despite this fact, however, people in Namie Town believe even radiation of 1 mSv will cause them some biological effects. Although basic general knowledge on radiation should be provided, a reliable relationship between the general public and experts also needs to be established.

著者

細田 正洋 赤田 尚史 下 道國 古川 雅英 岩岡 和輝 床次 眞司

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.64, no.7, pp.465-474, 2015-07-15 (Released:2015-07-28)

参考文献数

24

被引用文献数

3 4

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岐阜県東濃地域において3″φ×3″NaI(Tl)シンチレーションスペクトロメータを用いた走行サーベイによって空気吸収線量率の測定を行った。逆距離荷重補間法によって東濃地域の空気吸収線量率の等値線図を作成した。土岐花崗岩及び苗木花崗岩地域の空気吸収線量率は領家帯花崗岩地域と比べて相対的に高い傾向を示した。東濃地域の6地点では,3″φ×3″NaI(Tl)シンチレーションスペクトロメータを用いて地表面から1mの高さにおけるγ線波高分布を取得した。得られたγ線波高分布の全てに134Cs及び137Csのフォトピークは観測されなかった。土岐市内の神社境内において最大で552nGy/hの空気吸収線量率,914Bq/kgの238U系列濃度が観測された。

著者

岩岡 和輝 米原 英典

出版者

公益社団法人 日本アイソトープ協会

雑誌

Radioisotopes (ISSN:00338303)

巻号頁・発行日

vol.59, no.12, pp.733-739, 2010-12-15

参考文献数

41

被引用文献数

1

---

タバコに含まれる<SUP>210</SUP>Poや<SUP>210</SUP>Pbは喫煙の燃焼によって揮発して人体に取り込まれるため,喫煙者はこれら核種によって被ばくする。本稿では,喫煙者の線量評価に関する様々なパラメータのレビューを行い,それらのデータから喫煙者の年間実効線量を評価した。喫煙者の年間実効線量はおよそ0.2mSv y<SUP>-1</SUP>であり,商品の輸出入の際に用いられるICRP Publ.82の介入免除レベル(1mSv y<SUP>-1</SUP>)よりも低かった。