AMS measurements of 129I in seawater around Iceland and the Irminger Sea

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:294

Article; Proceedings Paper

Gomez-Guzman, J. M.¹  Villa-Alfageme, Maria²  Le Moigne, F.³  Lopez-Gutierrez, J. M.^1,4  Garcia-Leon, M.^1,5 

[1] Ctr Nacl Aceleradores, Seville, Spain

[2] Univ Seville, ETSIE, Dpto Fis Aplicada 2, Seville, Spain

[3] Natl Oceanog Ctr, Dept Ocean Biogeochem & Ecosyst, Southampton, Hants, England

[4] Univ Seville, EUP, Dpto Fis Aplicada 1, Seville, Spain

[5] Univ Seville, Dpto Fis Atom Mol & Nucl, Seville, Spain

关键词: Iodine-129;    Accelerator mass spectrometry;    Seawater;    North Atlantic;    Irminger;    Sellafield;   

DOI  :  10.1016/j.nimb.2012.07.045

来源: Elsevier

【 摘 要 】

Large amounts of iodine-129 were, and still are, released into the environment from nuclear facilities, in particular from two reprocessing facilities located on the east coast of the North Atlantic Ocean (Sellafield and La Hague). The main transport path of the releases from the two facilities is through the North Atlantic Current (NAC) and subsequently the Norwegian Coastal Current (NCC) to the Arctic Ocean. Iceland lies on the Scotland-Greenland ridge, which separates the Atlantic and Arctic oceans. I-129 data available in that area are scarce despite their importance in modeling I-129 dispersion through the North Atlantic and Arctic Oceans. For this reason, we have determined the I-129/I-127 ratio in seawater samples by means of Accelerator Mass Spectrometry (AMS) from three locations at the Iceland and Irminger Basins at different depths (from surface to 1000 m) in order to study the transport pathways of the anthropogenic releases to the waters. The measured I-129/I-127 ratios, compared to the pre-anthropogenic I-129/I-127 value, show the strong influence of the artificial I-129 discharges in the North Atlantic waters. (C) 2012 Elsevier B.V. All rights reserved.

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