Nuclear valves performance test and maintenance decision making support system
                                                                                  LI Jialiang, XU Xianglian
                                            (School of Automation, Wuhan University of Technology, Wuhan 430070, China)

Abstract: Aiming at the problems of overoccupation of human resources and poor economic efficiency of valves commissioning and maintenance in nuclear power plant, an automated performance test method of valves was studied with the nuclear electric gate valve as a typical example. The test scheme was enacted, and the monitoring methods of the key index such as the stator current of the valve motor and the stem thrust were discussed. Considering the stability of the index, the traditional superiority evaluation method was improved for the analysis of interval performance test results. Based on the research above, the performance analysis and maintenance decisionmaking model of the valves was constructed. The application system, ARM CortexM4 as the core of the hardware control module and the C/S (Client/Server) mode as the humancomputer interaction software architecture, was designed and tested. The results indicate that the system can realize debugging assistance, automated performance testing and maintenance decision support. It helps to improve the efficiency of valves testing and optimize its maintenance structure.

Key words: nuclear valves; automated performance test method; improved superiority evaluation method; maintenance decisionmaking; ARM; design of system