NATURALLY OCCURRING RADIONUCLIDE <sup>210</sup>PO IN THE BLACK SEA MOLLUSCS
<sup>210</sup>Po accumulation by five species of the Black Sea molluscs inhabiting the Sevastopol bays was studied. <sup>210</sup>Ро concentrations in investigated mollusks vary widely and depend on the type of their nutrition. The highest concentration was found in the Far-Eastern giant oyster and the lowest one - in nana. <sup>210</sup>Po accumulation by the Black Sea mussels depends on their individual wet weight (WW), the stages of maturity of the gonads and inhabitancy condition. Such dependences were found for the Far-Eastern giant oyster. Concentration Factors (CF) of <sup>210</sup>Po for the Black Sea molluscs vary from 7x10 <sup>3</sup> to 5.2x10 <sup>4</sup>. This is in good agreement with World Ocean average value for <sup>210</sup>Po CF for molluscs which equals 3x10 <sup>4</sup>.