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Updated: Feb 23, 2026

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
Published on: November 9, 2015
No Fukushima Dai-ichi derived plutonium signal in marine sediments collected 1.5-57km from the reactors
C C S Wendel1, O C Lind1, L K Fifield2
1Centre of Environmental Radioactivity CoE, Department of Environmental Sciences, Norwegian University of Life Sciences (NMBU), N-1433 Ås, Norway.
Abstract:
Based on AMS analysis, it is shown that no Pu signals from the Fukushima accident could be discerned in marine sediments collected 1.5-57km away from the Fukushima Da-ichi power plant (FDNPP), which were clearly influenced by accident-derived radiocesium. The 240Pu/239Pu atom ratios (0.21-0.28) were significantly higher than terrestrial global fallout (0.182 ± 0.005), but still in agreement with pre-FDNPP accident baseline data for Pu in near coastal seawaters influenced by global fallout and long-range transport of Pu from the Pacific Proving Grounds.
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