Japanese population dose from natural radiation

資料種別:
論文(リポジトリ)
責任表示:
Omori, Yasutaka ; Hosoda, Masahiro ; Takahashi, Fumiaki ; Sanada, Tetsuya ; Hirao, Shigekazu ; Ono, Koji ; Furukawa, Masahide
言語:
英語
出版情報:
IOP Publishing, 2020-08-14
著者名:
Omori, Yasutaka
Hosoda, Masahiro
Takahashi, Fumiaki
Sanada, Tetsuya
Hirao, Shigekazu
Ono, Koji
Furukawa, Masahide
続きを見る
掲載情報:
Journal of Radiological Protection
ISSN:
0952-4746  CiNii Articles  Webcat Plus  JAIRO
1361-6498  CiNii Articles  Webcat Plus  JAIRO
巻:
40
通号:
3
開始ページ:
R99
終了ページ:
R140
バージョン:
publisher
概要:
The radiation doses from natural radiation sources in Japan are reviewed using the latest knowledge. The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) and the Nuclear Safety Research Association report the annual effective doses from cosmic rays, terrestrial radiation, inhalation, and ingestion as natural sources. In this paper, the total annual effective dose from cosmic-ray exposure is evaluated as 0.29 mSv. The arithmetic mean of the annual effective dose from external exposure to terrestrial radiation is 0.33 mSv for the Japanese population using the data of nationwide surveys by the National Institute of Radiological Sciences. Previously in Japan, although three different groups have conducted nationwide indoor radon surveys using passive-type radon monitors, to date only the Japan Chemical Analysis Center (JCAC) has performed a nationwide radon survey using a unified method for radon measurements conducted indoor, outdoor, and in the workplace. Consequently, the JCAC results are used for the annual effective dose from radon and that for radon inhalation is estimated as 0.50 mSv using a current dose conversion factor. In this paper, UNSCEAR values are used for the mean indoor and outdoor thoron-progeny concentrations, and the annual effective dose from thoron is reported as 0.09 mSv. Thus, the annual effective dose from radon and thoron inhalation is 0.59 mSv. From a JCAC large-scale survey of foodstuffs, the committed effective dose from the main radionuclides in dietary intake is 0.99 mSv. Finally, the Japanese population dose from natural radiation is given as 2.2 mSv, which is similar to the reported global average of 2.4 mSv. 続きを見る
URL:
http://hdl.handle.net/20.500.12000/47545
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