I released from the Fukushima Daiichi Nuclear Power Plant in the Kuroshio and Oyashio current areasSuzuki, Takashi 
; Otosaka, Shigeyoshi 
; Kuwabara, Jun ; Kawamura, Hideyuki ; Kobayashi, Takuya
To investigate the penetration of radionuclides released from Fukushima Daiichi Nuclear Power Plant (FDNPP), depth profiles were revealed at Kuroshio current, transition, and Oyashio current areas. The FDNPP-derived I was found in surface layer at Oyashio current and transition areas and in sub-surface layer at Kuroshio current area. Moreover, it was found that the FDNPP-derived I/
Cs ratios in the Oyashio current and transition areas were higher than that in the FDNPP reactor. The higher FDNPP-derived I/Cs ratios suggest three potential mechanisms for the migration of radionuclides in the environment: (1) radioiodine was released more easily than radiocesium by the FDNPP accident, (2) I was supplied from the atmosphere by re-emitted I from contaminated areas around Fukushima, (3) leaked water that removed radiocesium reached the sampling stations. The FDNPP-derived I in sub-surface layer would be transported by the meander of the Kuroshio Extension current.
Language |
: | English |
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: | 204 |
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Pages |
: | p.163 - 171 |
Publication Year/Month |
: | 2018/08 |
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Keywords |
: | 福島第一原子力発電所事故; ヨウ素129; 海水の沈み込み; 黒潮続流の蛇行; Fukushima Daiichi Nuclear Power Station Accident; |
Research Facility |
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Article of JAEA R&D Review |
: | Exploring the Migration of Radionuclides to the Deep Ocean; Elucidation of Subduction from the Vertical Distribution of Concentration[ |
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Percentile:12.01 Category:Chemistry, Multidisciplinary |
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