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239+240Pu and137Cs distributions in seawater from the Yamato Basin and the Tsushima Basin in the Japan Sea

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Abstract

Seawater samples were collected from the Yamato Basin and the Tsushima Basin in the Japan Sea and analyzed for their239+240Pu and137Cs concentrations. The concentration of239+240Pu was 7.4 mBq/m3 in the surface water and increased with depth to a maximum value of 38.6 mBq/m3 at 500 m at the Yamato Basin station. The subsurface maximum may be produced by scavenging of239+240Pu in surface water and release of239+240Pu from settling particles. The239+240Pu inventories in the water column were 86.6 and 85.2 Bq/m2 at the two basin stations, suggesting that 90% of239+240Pu delivered to the Japan Sea is still present in the water column.

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Authors and Affiliations

  1. Division of Marine Radioecology, National Institute of Radiological Sciences, Isozaki 3609, 311-12, Hitachinaka, Ibaraki, Japan

    M. Yamada, T. Aono & S. Hirano

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  1. M. Yamada
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  2. T. Aono
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  3. S. Hirano
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Yamada, M., Aono, T. & Hirano, S. 239+240Pu and137Cs distributions in seawater from the Yamato Basin and the Tsushima Basin in the Japan Sea. Journal of Radioanalytical and Nuclear Chemistry Articles 210, 129–136 (1996). https://doi.org/10.1007/BF02055412

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