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Current Concentration of Artificial Radionuclides and Estimated Radiation Doses from 137Cs around the Chernobyl Nuclear Power Plant, the Semipalatinsk Nuclear Testing Site, and in Nagasaki


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タイトル: Current Concentration of Artificial Radionuclides and Estimated Radiation Doses from 137Cs around the Chernobyl Nuclear Power Plant, the Semipalatinsk Nuclear Testing Site, and in Nagasaki
著者: Taira, Yasuyuki / Hayashida, Naomi / Brahmanandhan, Gopalganapathi M. / Nagayama, Yuji / Yamashita, Shunichi / Takahashi, Jumpei / Gutevitc, Alexander / Kazlovsky, Alexander / Urazalin, Marat / Takamura, Noboru
発行日: 2011年
出版者: 日本放射線影響学会 / The Japan Radiation Research Society
引用: Journal of Radiation Research, 52(1), pp.88-95; 2011
抄録: To evaluate current environmental contamination and contributions from internal and external exposure due to the accident at the Chernobyl Nuclear Power Plant (CNPP) and nuclear tests at the Semipalatinsk Nuclear Testing Site (SNTS), concentrations of artificial radionuclides in edible mushrooms, soils and stones from each area were analyzed by gamma spectrometry. Annual effective doses were calculated for each area from the cesium contamination. Calculated internal effective doses of 137Cs due to ingestion of mushrooms were 1.8 × 10-1 mSv/year (y) in Gomel city (around CNPP), 1.7 × 10-1 mSv/y in Korosten city (around CNPP), 2.8 × 10-4 mSv/y in Semipalatinsk city, and 1.3 × 10-4 mSv/y in Nagasaki. Calculated external effective doses of 137Cs were 3.4 × 10-2 mSv/y in Gomel city, 6.2 × 10-2 mSv/y in Korosten city, 2.0 × 10-4 mSv/y in Semipalatinsk city, and 1.3 × 10-4 mSv/y in Nagasaki. Distribution of radionuclides in stones collected beside Lake Balapan (in SNTS) were 241Am (49.4 ± 1.4 Bq/kg), 137Cs (406.3 ± 1.7 Bq/kg), 58Co (3.2 ± 0.5 Bq/kg), and 60Co (125.9 ± 1.1 and 126.1 ± 1.1 Bq/kg). The present study revealed that dose rates from internal and external exposure around CNPP were not sufficiently low and radiation exposure potency still exists even though current levels are below the public dose limit of 1 mSv/y (ICRP1991). Moreover, parts of the SNTS area may be still contaminated by artificial radionuclides derived from nuclear tests. Long-term follow-up of environmental monitoring around CNPP and SNTS, as well as evaluation of health effects in the population residing around these areas, may contribute to radiation safety with a reduction of unnecessary exposure of residents.
キーワード: Chernobyl Nuclear Power Plant / Effective dose / Gamma spectrometry / Radiation exposure potency / Semipalatinsk Nuclear Testing Site
URI: http://hdl.handle.net/10069/24981
ISSN: 04493060
DOI: 10.1269/jrr.10104
権利: Copyright (c) 2011 by THE JAPAN RADIATION RESEARCH SOCIETY
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:110 学術雑誌論文

引用URI : http://hdl.handle.net/10069/24981

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