Development of Stress-Based Fatigue Monitoring System based on the Stress Transfer Function for Nuclear Power Plants

Fatigue monitoring system has been considered as a practical mean to ensure safe operation of the nuclear power plants. The fatigue monitoring system evaluates various plant conditions and their effects on the monitored location to give quantified value that indicates accumulated fatigue damage up to date. In Korea, a prototype of Nuclear Fatigue Monitoring System (NuFMS) has been developed in web environment and will be widely applied to the operating plants. In this paper, overall configuration and stress-based fatigue monitoring method of the NuFMS is described. In addition, the feasibility of the stress-based monitoring method is demonstrated through the comparison with the finite element analysis (FEA) results. In this paper, overall configuration and stress-based fatigue monitoring method of the NuFMS is described. In addition, the feasibility of the stress-based monitoring method is demonstrated through the comparison with the finite element analysis (FEA) results. The fatigue evaluation results by the NuFMS agree very well with those by the FEA and hand calculation