English Abstract In the framework of the PACOMA-project (Performance
Assessment of Confinements for Medium and Alpha Waste), initiated by the
European Commission, possible future radiation doses, due to contamination
of the biosphere by radionuclides originating from radioactive waste
disposed in salt-formations, were calculated. In all cases considered
radionuclides coming out of the geosphere enter a river. For the biosphere
calculations the BIOS-model, developed by the NRPB in England, is used. A
short description of the model, as well as of the adjustments made at the
RIVM to calculate the total individual and collective doses and the subdoses
of different exposure pathways is given. The values of biosphere parameters
selected for the model are presented, together with the literature
consulted.
