The marine impact of caesium-134 and -137 from the Chernobyl reactor accident |
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| Institution: | 1. Instituto de Geofísica, Universidad Nacional Autónoma de México, Unidad Michoacán, Antigua Carretera a Pátzcuaro 8701, 58190, Morelia, Michoacán, Mexico;2. CONACYT-Sección de Estudios de Posgrado e Investigación, Instituto Politécnico Nacional, ESIA Zacatenco, 07738, Mexico City, Mexico;3. Barcelona Supercomputing Center-Centro Nacional de Supercomputación, Nexus II Building, Jordi Girona 29, 08034, Barcelona, Spain;4. Instituto de Geología, Universidad Nacional Autónoma de México, Coyoacán, 04510, Ciudad de México, Mexico;1. GEODUNES, 79 rue Pasteur 59240 Dunkirk, France;2. Laboratoire d’Océanologie et de Géosciences, UMR CNRS 8187, Université du Littoral Côte d’Opale, 32 Ave Foch, 62930 Wimereux, France;1. Key Laboratory for Tumor Immunology and Traditional Chinese Medicine Immunology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan, China;2. School of Medicine and Life Science, University of Jinan-Shandong Academy of Medical Science, Jinan, China;3. Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China;4. Shandong University, Jinan, China;1. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft NR33 0HT, United Kingdom;2. Food Standards Agency, London WC2B 6NH, United Kingdom;1. British Geological Survey, Maclean Building, Wallingford OX10 8BB, United Kingdom;2. British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom;3. Centre for Ecology and Hydrology, Maclean Building, Wallingford OX10 8BB, United Kingdom;4. Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United Kingdom |
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| Abstract: | 134Cs and 137Cs from the Chernobyl reactor accident were detected in UK shoreline seawater very quickly after activity from the accident reached this country. Concentrations were highest in areas adjacent to those where deposition over land was highest, but they declined quickly and did not reach radiologically significant levels in terms of public radiation exposure. Subsequently, the distribution in seawater was investigated further afield. Radiocaesium attributable to the Chernobyl accident was found to be widespread: it was readily distinguished from other sources by having a different 137Cs:134Cs ratio (about 2:1). Its presence was especially noticeable in northern UK waters rather than those to the south; much of the North Sea has been surveyed as well as the Norwegian Sea. Evidence of Chernobyl radiocaesium was found as far north as 70°N and in many of these areas, including the northern North Sea, it overshadowed the effect of BNFL (British Nuclear Fuels plc) Sellafield discharges, previously the main source of these radionuclides. |
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