Aiming at the features of rod control system in unit 3 and 4 of Hongyanhe Nuclear Power Plant { NPP}, i. e. , long term continuous operation, requesting high reliability and security, thus redundant design for its power supply device { PSD） has been adopted. The reliability theory and method are used for reliability modeling of the redundant power supply device, and the reliability block diagram of redundant power supply device is obtainedl The quantitative analysis and prediction of the reliability and failure rate of the device are conducted...
