Research and Analysis on 1E Distributed Control System Priority Logic Module

The nuclear reactor 1E DCS priority logic module is one of the very important components of the nuclear reactor I&C (Instrument and Control) system. Its main function is to prioritize different DCS control command, and then drive especial safety facilities and related support systems (pumps, valves and other related equipment). Driven devices such as pumps, valves, etc. need to execute related functions according to the drive signals issued by the priority logic modules. The characteristics and advantages between seven kinds of domestic and international priority logic modules are analyzed by comparing their function and implementation mode. Comparison shows that different manufacturers' products also have their own characteristics. At present, many companies at home and abroad have designed different priority logic modules based on their own ideas. However, the public literature about priority logic modules is very limited, let alone summary analysis about it. Therefore, this paper has important engineering significance and reference value for the design of priority logic module.