Mathematical models of strontium 90 behaviour in ''water-fresh water fish spawn'' system for some particular cases of radionuclide incorporation into the organism

A two-compartment model for 90Sr exchange in the ''water/fresh water fish spawn'' system is proposed. Systems of differential equations are examined which describes the kinetics of 90Sr in fish spawn, with regard to accumulation and elimination in some of the most likely situations of radioactive contamination of the aquatic environment. Theoretical and experimental results are compared on the time involved in the accumulation and retention of 89Sr. The proposed model can be used not only for the interpretation of data but also for designing further experiments