Plutonium release from Fukushima Daiichi fosters the need for more detailed investigations

Stephanie Schneider, Clemens Walther, Stefan Bister, Viktoria Schauer, Marcus Christl, Hans-Arno Synal, Katsumi Shozugawa & Georg Steinhauser
The contamination of Japan after the Fukushima accident has been investigated mainly for volatile fission products, but only sparsely for actinides such as plutonium. Only small releases of actinides were estimated in Fukushima. Plutonium is still omnipresent in the environment from previous atmospheric nuclear weapons tests. We investigated soil and plants sampled at different hot spots in Japan, searching for reactor-borne plutonium using its isotopic ratio Pu-240/Pu-239. By using accelerator mass spectrometry, we clearly demonstrated...
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