Doses to selected seawater organisms from ~(137)Cs, ~(226)Ra and ~(239,240)Pu

摘要

The dose assessment for aquatic animals was performed, based on the methodology elaborated by U.S. Department of Energy. Baltic Sea fish (cod, sprat, herring, plaice) and crustaceans (Sanduria entomon and Mytilus edulis) were taken in to consideration and the annual doses from ~(137)Cs, ~(226)Ra and ~(239)Pu to organisms were calculated at average concentrations of these radionuclides observed in water, concentration of radionuclides determined in bottom sediments from two sub-areas (Gdansk Basin and Bornholm Basin) and average concentrations of radionuclides in animal tissues. The total maximal annual doses for seawater organisms do not exceed a one percent of recommended dose limits of 3.6 Gy y~(-1). The default animal-water bioacumulation ratios that are provided by screening metodology can be used with caution when they are aplied to dose evaluation for biota.