Impact on marine environment of radioactive releases resulting from the Fukushima-Daiichi nuclear accident
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چکیده
Since several days, radioactive pollution was observed in the marine environment, at varying distances from the Fukushima-Daiichi power station. The main radionuclides regularly found in the sea water are (T = radioactive half-life): iodine 131 (T = 8 days), caesium 137 (T = 30 years), caesium 134 (T = 2.1 years), caesium 136 (T = 13.1 days), tellurium 132 / iodine 132 (T = 78 hours). Others have also been detected occasionally at lower concentrations: tellurium 129m / tellurium 129 (T = 33.6 days), barium 140 / lanthanum 140 (T = 12.7 days), ruthenium 105 (T = 4.4 hours), ruthenium 106 (T = 368 days), molybdenum 99 / technetium 99m (T = 65.9 hours), cobalt 58 (t = 70.9 days).
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