Design and Optimization of Communication in Nuclear Safety Class Emulation System

The nuclear power plant full scope simulator (FSS) is very important in science research and operators training. The safety class I&C (instrument and control) emulation system emulates the behavior of 1E DCS (Distributed Control System) in the FSS. Design of the communication for the safety class I&C emulation system which is routed on the virtual embedded system includes inner communication and outer communication. Inner communication includes the communications between Data Management Service (DMS) and Virtual Control Station (VCS), VCS and Virtual Main Processing Unit (VMPU), and VCSs themselves. Based on the widely used TCP protocol network, in order to make the emulation system as accurate as the real one, the communication framework of the entire system should be optimized. As for the issue that there is slightly time latency on I&C emulation system, event-triggered based information schedule method is developed to optimize the response speed of the system. As an example, a shutdown on the reactor caused by over-pressure on the reactor containment is simulated to verify the effects on the optimization of communication structure.