DEVELOPMENT AND VALIDATION OF ATMOSPHERIC DISPERSION - COMPUTER-PROGRAM USING TRITIUM AIR CONCENTRATIONS IN THE ENVIRONMENT AROUND HEAVY-WATER REACTOR POWER-PLANTS

We have developed a computer program ATDC (Atmospheric Tritium Dispers ion Code) to predict downwind tritium air concentrations in the enviro nment around nuclear power plants on the basis of the Gaussian plume m odel. The tritium air concentrations by field measurement [measured tr itium air concentrations in the areas adjacent to Wolsong Unit 1, a pr essurized heavy water reactor (PHWR)] were compared with that by calcu lation to validate the program. The predicted and measured atmospheric tritium concentrations were quite consistent in trend and magnitude. This computer program will be useful in reviewing and evaluating envir onmental radiological impacts for PHWRs. Especially, it will be of gre at help to predict the behavior of tritium in the atmospheric environm ent around nuclear power plants. (C) 1998 Elsevier Science Ltd. All ri ghts reserved.