Study on Updating and Modification of Computer-Based Procedure System of Nuclear Power Plant

This paper describes the development process of the computer-based procedure system (CBPs) and the requirements of regulation and standards. Based on the operating experience of the digital control system in CPR1000 nuclear power plants, it puts forward the user needs of the CBPs of the second generation nuclear power plants in service in China to improve the level of automation, the convenience of operation and maintenance management, and the friendliness of human-computer interface. The requirements and constraints for updating and modification of nuclear power plants in service are analyzed, including consideration of six aspects, such as software and hardware platform performance, operator operation habits, operation procedure architecture, power plant operation and maintenance plan, verification and training, and safety and economic benefits. Different types of CBPs is compared and analyzed, and the updating scheme of the CBPs of the nuclear power plant in service is proposed, which is divided into three stages. The first stage is to realize a well used computer-based procedure system. The second stage is to realize a computer-based procedure system with higher level of automation. The third stage is to realize a highly intelligent computer-based procedure system. This paper introduces the development and implementation process of the first level updating scheme of the CBPs of CPR1000 nuclear power plants. And it briefly describes the design principles and main technical points of the transformation scheme. The verification plan is proposed based on different platforms and different objects. The future development direction of the CBPs is analyzed. And personal prospects and solutions are proposed.