2017 Fiscal Year Final Research Report
Did Uranium reactor fuel be released from the Fukushima Daiichi Nuclear Power Plant accident? : A new approach using Uranium-236
| Project/Area Number |
16K12592
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Risk sciences of radiation and chemicals
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| Research Institution | Hirosaki University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TAZOE Hirofumi 弘前大学, 被ばく医療総合研究所, 助教 (60447381)
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| Research Collaborator |
YANG Guosheng
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | 誘導結合プラズマ質量分析法 / 福島第一原子力発電所事故 / ウランー２３６ / 環境分析 |
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| Outline of Final Research Achievements |
In order to perform routine monitoring of 236U activities and 236U/238U atom ratios in environmental samples after the Fukushima Daiichi Nuclear Power Plant accident (FDNPP), a simple method has been developed to take advantage of the advancement in triple-quadrupole inductively coupled plasma-mass spectrometry (ICP-MS/MS). The method was examined using four standard reference materials, and the results were in agreement with their information values. The 236U activities in 46 soil samples both heavily and lightly contaminated by this accident were measured by ICP-MS/MS. The 236U activities and 236U/238U atom ratios were in the range of (0.469－24.4)×10-5 Bq kg-1 and (0.099－1.35)×10-7, respectively. High linear correlations were presented between 236U and 239+240Pu activities, and between 236U and 238Pu activities. The analysis of these soil samples confirmed the release of 236U, although in trace amounts, during the FDNPP accident.
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| Free Research Field |
環境放射能学、地球化学
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