Modeling radionuclide migration in complex nonuniform water bodies using the POMRad model system

The POMRad system of computer models is developed using the Princeton Ocean Model (POM) program code. The system enables modeling the radionuclide migration in large nonuniform water bodies (seas, bays, large rivers, and lakes) taking account of the migration of radioactive substances in the water mass-bottom system associated with the migration of radionuclides sorbed on suspended sediments and in solutes. In order to take account of radionucide transport with sediments the POM program code is supplemented with the models describing transport, settling, and resuspension of suspended sediments. The verification was carried out through comparing analytical solutions of simplified problems concerning the content of radionuclides in water, and modeling results. A potential of the POMRad application is demonstrated by an example of simulating the radioactivity transport in marine environment in the case of hypothetical accidents in the Saida and Kola bays.