Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 68(11): 805-814 (2019)

連載講座Serial Lecture

環境移行データによる放射性核種の環境動態と将来予測Use of Environmental Transfer Data to Understand the Fates of Radionuclides in the Environments and the Future

量子科学技術研究開発機構量子医学・医療部門福島再生支援研究部Department of Radioecology and Fukushima Project, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Sciences and Technology ◇ 263–8555 千葉県千葉市稲毛区穴川4–9–1 ◇ 4–9–1 Anagawa, Inage-ku, Chiba 263–8555, Japan

発行日:2019年11月15日Published: November 15, 2019


Analyses of environmental transfer data of radiocaesium released from the Fukushima Dai-ichi Nuclear Power Plant accident had been carried out in terrestrial, freshwater and marine environments. The results showed that the obtained environmental transfer parameter values were getting closer every year to those determined for the global fallout 137Cs studies before the Fukushima nuclear accident. Thus it was implied that the fate of radiocaesium in the environments had almost reached to equilibrium conditions now; that is, a certain percentage of total radiocaesium circulates in the environment like before the accident. Further field observation to collate suitable environmental transfer parameter values of radiocaesium are still necessary, and then by supplying those data for mathematical models for long-term dose assessment, it is expected to have more reliable and precise radiation dose assessment results in the future.

Key words: environmental transfer parameter; equilibrium condition; mathematical model; Fukushima Dai-ichi Nuclear Power Plant Accident; long-term fate

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