Publications

A record of( 241)Am, U-236, U-238, Pu-239, Pu-240, Cs-134 and Cs-137 in surface seawater and Am-241 in aerosols shortly after the FDNPP incident occurred

Author(s)
Taeko Shinonaga, Katharina Gückel, Masatoshi Yamada, Toshitaka Gamo, Peter Steier, Marcus Christl, Zhongtang Wang, Uta Czeslik, Hirofumi Tazoe, Jochen Tschiersch
Abstract

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.

Organisation(s)
Isotope Physics
External organisation(s)
Helmholtz-Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt, University of Tokyo, Eidgenössische Technische Hochschule Zürich, VKTA Radiat Protect Analyt & Disposal, Chinese Academy of Engineering Physics (CAEP), Hirosaki University
Journal
Geochemical Journal
Volume
55
Pages
33-38
No. of pages
6
ISSN
0016-7002
DOI
https://doi.org/10.2343/geochemj.2.0615
Publication date
2021
Peer reviewed
Yes
Austrian Fields of Science 2012
105105 Geochemistry, 103014 Nuclear physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/a-record-of-241am-u236-u238-pu239-pu240-cs134-and-cs137-in-surface-seawater-and-am241-in-aerosols-shortly-after-the-fdnpp-incident-occurred(985224ff-7e53-458b-aa01-fe9fe1a1c852).html