Abstract
To estimate FP deposition rate on the typical turbomachinary, including gas turbine of GTHTR300 and exposure dose limit at its maintenance, FP plate-out analysis was been carried out using FP compound formation theory and FP concentration controled diffusion mechanisum.
As the results, following conclusions were derived;
(1) It is found that the analysis data computed by the VICTORIA code with assumption of the correct thickness of reactive zone exhibits very good correlation with the experimental data obtained by simulated FP plate-out experiment.
(2) 137Cs, 110mAg and 137Cs (131+133)I compound are major fission products deposited on the surface of turbomachinery.
(3) Deposition rates of major FPs on the surface of gas turbine blade and disk are (131+133)I>137Cs>110mAg.
(4) Total dose rate and allowable work time at turbine of GTHTR300 are given as 19.2mSv/h and 2.6h by VICTORIA code analysis and these values are conservative than that given by simple code analysis.
