On the possible impact from the nuclear industry on tritium content in the Danube

An analysis has been carried out of tritium sources in the Danube and the impact of each particular source on the variation of tritium concentration. The evaluations were done on the basis of IAEA data on PWRs and BWRs performance during normal operation. According to the published data by Austrian, Yugoslavian, Rumanian and Bulgarian authors a conclusion can be drawn that the contribution from the nuclear power plants to the tritium content in the Danube at the present time does not exceed 3-4%. Calculations for the year 200g show the expected tritium concentration level to be decreased by factor of 4 while the nuclear industry contribution should grow up to 50%