A study on the optimization of decision technique about RCS leakage inside containment vessel

Due to the increase in the number of operating nuclear plants, the experience of Reactor Coolant System leakage has been continuously increased. Since commercial operations began with Kori Unit 1 in April 1978, the number of unplanned reactor trips due to RCS leakage inside containment vessel is fifteen as of the end of 2001. Reactor operator's quick decision and action on RCS leakage are very important in order to minimize unplanned shutdowns and to prevent radiation contamination and accident extension due to RCS leakage. Therefore in this study, optimization techniques are suggested to decide RCS leakage inside containment vessel through the results of the analysis of simulation and operation experience examples