Doses for critical group members as a result of a nuclear research reactor decommissioning

The paper presents the risk assessment methodology for the critical group members (infants and adults) as a result of the radioactive effluents releasing, during VVR-S nuclear research reactor decommissioning process. The derived emission limits of the effluents were established using the transport model in the environment in order to comply with dose constraints assigned by the regulatory body for public members. Doses were estimated taking into account the age, weight, metabolism and nutrition habits of an individual, based on the dose constraint of 50 μSv/year. The gaseous effluents activities were much lower than the liquids effluents activities. Consequently, for dose calculation a dose constraint of 10 μSv/year were assigned for gaseous and 40 μSv/year for liquid. Doses received are consistent with the dose constraint for gaseous effluents. On the contrary, the dose received are non-consistent for liquid effluents. For both cases the most restrictive dose values were for the adults.