Sources of anthropogenic pollution in the Nordic seas and arctic -- Study region and environmental datasets -- Generic model system (GMS) for simulation of radioactive spread in the aquatic environment -- Studies of potential radioactive spread in the Nordic seas and arctic using the generic model system (GMS) -- Studies of the spread of non-radioactive pollutants in the arctic using the generic model system (GMS) -- Assessment and input to risk management -- appendix A. Time series of annual average concentrations of radionuclides in water and sediments by accident scenario and location used for dose calculations -- appendix B. Doses to individuals in critical groups from all accident scenarios given by radionuclide and exposure pathway.