Prediction of environmental impact of liquid radioactive effluents from Jaslovske Bohunice nuclear power plants

The complex of Bohunice nuclear power plants consists of the A-1 power plant which is in the state of decommissioning, the V-1 which is in operation and the V-2 which is currently under construction, each with two WWER-440 reactors. The total effluent of pure condensate containing tritium and other radioisotopes is calculated at 7,200 m3 per annum. The discharged amount of non-radioactive waste waters from each power plant is approximately 450 l/s. From the Bohunice A-1 power plant 2000 to 3000 m3/year of low-level water is currently being discharged. Conventional pollution of waste waters consists mainly in the high content of oil products (ca. 6 mg/l) and considerable salination. Waste waters from the area are diverted by an open channel into the Dudvah river; a buried conduit is being built which will divert the waste waters into the Vah river. A transport model of the water flow with a recipient has been used to construct a calculation model of radioactive contamination of the Vah river. Various aspects are discussed of the radiation burden of the population by gaseous emissions and liquid effluents. The highest exposure will be at least 100 times less than the permissible value. The radioactive liquid effluent contributes with 0.08% to the total collective dose equivalent in the whole environment of the Bohunice power plant. (M.D.)