New Method for Detecting Failures of Power Converter Module in Control Rod Control System

In this paper, we introduce a new method for detecting failures of a power converter module in control rod control system of a nuclear power plant. The failure called the phase failure and occurring in a power converter module can exert harmful influence upon the operation of the associated control rod drive mechanism for driving neutron-absorbing control rods controlling the thermal output of the reactor. Because of this adverse condition, it is necessary that the phase failure should be detected quickly and correctly. We devised a new method for detecting the phase failure for the digital power controller and solved the drawbacks of the existing failure detector