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A record of 241Am, 236U, 238U, 239Pu, 240Pu, 134Cs and 137Cs in surface seawater and 241Am in aerosols shortly after the FDNPP incident occurred.
Geochem. J. 55, 33-38 (2021)
We obtained the rare data on low activity concentration of Am-241 in the surface seawater collected at about 210 km northeast of Fukushima Daiichi Nuclear Power Plant (FDNPP) on 29 April 2011. The concentration of U-236, U-238, Pu-239, Pu-240, Cs-134 and Cs-137 in that seawater was also determined and the atomic ratio U-236/U-238 and Pu-240/Pu-239 was calculated. The activity concentration of Cs-137 compared to that before the incident and the equal activity ratio of Cs-134/Cs-137 clearly indicate that the seawater was contaminated by the radioactive Cs discharged from the FDNPP, while the activity concentration of Am-241 as well as U-236, Pu-239 and Pu-240 was in the range of the values reported before the incident. Am-241 in the aerosols collected at about 120 km from the FDNPP, in which FDNPP derived U-236 and Pu isotopes were found, was analyzed. However, no significant larger amount compared to U-236 and Pu239+240 was found.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Am-241 ; Actinides ; Surface Seawater ; Aerosol ; Fukushima; Pu Isotopes; Atom Ratios; Fukushima; Plutonium; Coastal; Uranium; Samples; Waters; Japan
ISSN (print) / ISBN 0016-7002
Journal Geochemical Journal
Quellenangaben Volume: 55, Issue: 1, Pages: 33-38
Publisher Geochemical Society of Japan ; TERRAPUB
Publishing Place 358-5 Yamabuki-cho, Shinjuku-ku, Tokyo, 162-0801, Japan
Reviewing status Peer reviewed
Institute(s) Institute of Radiation Medicine (IRM)
Grants JSPS KAKENHI