No Fukushima Dai-ichi derived plutonium signal in marine sediments collected 1.5-57km from the reactors.
Journal: Applied Radiation And Isotopes : Including Data, Instrumentation And Methods For Use In Agriculture, Industry And Medicine
Published:
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.
Authors
C Wendel, O Lind, L Fifield, S Tims, B Salbu, D Oughton