Hardware Design For Communication Control Board Of Nuclear Safety Class1E Digital Control Platform

Nuclear safety level of digital control and protection system has been China’snuclear power technology is difficult to break through one of the bottlenecks, severelyrestricted the size of China’s nuclear power development and economic security.Nuclear safety level of digital control platform developed successful, will mark China’snuclear power digital control R&D breakthrough has been made. The communicationcontrol board is to defend the level of nuclear safety within the digital control andprotection system, as well as with other systems the link between the datacommunications. High reliability, high stability, fast, self-diagnostic function ofcommunication with the control board on the security level of digital control of nuclearlocalization platform is significant.Digital control of nuclear safety grade communications platform, the control boardrequires compliance1E-level product requirements, development process and designshould be based on relevant laws, regulations and standards. Must be designed to meetthe board’s communications, data processing, communication isolation, electricalisolation, self-monitoring and other requirements of the board, while the reliability of itsrigorous design and electromagnetic compatibility and other designs.The issue of nuclear security level for communication control board hardwareresearch and design, using high-performance processors for data processing functions;100M custom network complete with communication capabilities; using dual port RAMbuffer for communication of data to meet the communication isolation requirements; byphotoelectric conversion of design, implementation, electrical isolation; uniquewatchdog circuit board self-diagnostic function; while applications from components,interface protection, multi-angle high-speed signal design, reliability andelectromagnetic compatibility design.The topic of hardware design, by a large number of board functionality andperformance testing, such as communication, performance, etc.; with digital control ofnuclear safety level of other boards and the platform structure, through the EMC,vibration tests, completed third-party certification; with the software V&V completedthe certification. To meet the product design level of nuclear safety requirements.