Baseline activity concentration of Po and Pb and dose assessment in bivalve molluscs at the Andalusian coast.

In this study, the activity concentrations of Po and Pb were determined in different types of bivalve molluscs sampled during the period of May 2014-June 2015 along the Andalusian littoral. Radioactivity concentrations of Po were determined through alpha-particle spectrometry using Po as an internal tracer. Radioactivity concentrations of Pb were determined through low-level gamma-ray spectrometry. The activity concentrations of Po and Pb varied between 40 ± 2 and 515 ± 9 Bq kg dry weight (d.w.), and ND (lower than limit of detection) and 73 ± 10 Bq kg d.w., respectively. The committed effective dose to humans was calculated to range from 39 to 477 μSv year. Radioactivity and dose levels were compared with previous studies from other countries.