Abstract
Commercial samples of Brazil nut were analysed to determine the natural radionuclide content and to assess the radiological risk resulting from its ingestion by members of the general public. Mean values of 1.4 ± 0.4 Bq.kg-1 for 238U, 26.3 ± 4.1 Bq.kg-1 for 226Ra, 4.7 ± 1.8 Bq.kg-1 for 210Pb, 16.5 ± 4.3 Bq.kg-1 for 232Th, 31.3 ± 6.4 Bq.kg-1 for 228Ra and 12.3 ± 5.1 Bq.kg-1 for 228Th were found in the samples analysed. Taking into account the annual production of Brazil nuts, the collective committed effective dose resulting from the ingestion of nuts corresponding to one year of production is estimated to be 8.6 x 102 man.Sv.
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