| Project/Area Number |
18K05205
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
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| Research Institution | Gakushuin University |
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Principal Investigator |
Takeshi Ohno 学習院大学, 理学部, 教授 (40452007)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 放射性ヨウ素 / ICP-MS / MS/MS / 原子力発電所事故 / 放射性セシウム / 福島原発事故 |
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| Outline of Final Research Achievements |
The accident at the Fukushima Daiichi Nuclear Power Plant resulted in a substantial release of radionuclides including Iodine-131, Cesium-134, and Cesium-137 to the atmosphere, and caused significant contamination of the environment. An effective dose estimation of released I-131 is important but difficult due to lack of data on the deposition of I-131. The long-lived radioiodine isotope I-129 is one of the important radionuclides released from nuclear fuel reprocessing plants and nuclear accidents into the environment. In particular, I-129 has been used as a tool to reconstruct the initial distribution of I-131 at nuclear accidents. In this study, the determination of I-129 in enviromental samples by ICP-MS/MS was performed, and the distribution of radioactive iodine released by the Fukushima Daiichi Nuclear Power Plant accident was examined.
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| Academic Significance and Societal Importance of the Research Achievements |
福島第一原子力発電所の事故により、大量の放射性ヨウ素（I-131）が放出された。I-131は体内に入ると甲状腺がんのリスク要因となるため、環境中に含まれるI-131に関する情報は重要である。しかし、事故後数ヶ月でI-131の放射能を調べることは困難となったため、本研究では、事故により同様に放出された長半減期放射性ヨウ素（I-129）を用いてI-131を推定する迅速分析法を開発した。本研究で開発したICP-MS/MS法を用いた分析法は従来法に比べ１０倍以上迅速に測定することが可能になった。
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