tailieunhanh - Nuclear Power Control, Reliability and Human Factors Part 5

Tham khảo tài liệu 'nuclear power control, reliability and human factors part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | An Approach to Autonomous Control for Space Nuclear Power Systems 109 intelligent control capability of the functional layer. The decision layer provides functionality to break down goals into objectives establish a sequential task ordering based on the plant system state and known constraints and assess the capability of the functional layer to implement those commands. At lower granularity within the decision layer executive functions such as procedure enforcement are dominant while at higher granularity planning functions such as goal determination and strategy development are dominant. There is an architectural approach for nearly autonomous control systems that have been applied through simulated nuclear power applications see Fig. 1 . As part of research into advanced multi-modular nuclear reactor concepts such as the International Reactor Innovative and Secure IRIS and the ALMR a supervisory control system architecture was devised Wood et al. 2004 . This approach provides a framework for autonomous control while supporting a high-level interface with operations staff who can act as plant supervisors. The final authority for decisions and goal setting remains with the human but the control system assumes expanded responsibilities for normal control action abnormal event response and system fault tolerance. The autonomous control framework allows integration of controllers and diagnostics at the subsystem level with command and decision modules at higher levels. Fig. 1. Supervisory control architecture for multi-modular nuclear power plants The autonomous control system architecture is hierarchical and recursive. Each node in the hierarchy except for the terminal nodes at the base is a supervisory module. The 110 Nuclear Power - Control Reliability and Human Factors supervisory control modules at each level within the hierarchy respond to goals and directions set in modules above it and to data and information presented from modules below it. Each module makes