Evaluation of an FPGA-based fuzzy logic control of feed-water for ABWR under automatic power regulating

This paper presents a new feed-water controller under the automatic power regulating system (APR) for an advanced boiling water reactor (ABWR). The new feed-water controller is designed by using a rule-based hierarchical fuzzy logic control algorithm and is implemented by using the modern field programmable gate array (FPGA) technology. The Lungmen nuclear power plant (LMNPP), an ABWR design, is chosen as a study case. The FPGA-based feed-water controller is integrated into the LMNPP's full-scope simulator with APR system for validation and performance evaluation. Under automatic power maneuvers, two trajectories in the power/flow map have been tested and compared with the origin design. The transient response and the steady state tracking capability were evaluated and showed satisfactory results. The results demonstrate that the FPGA-based hierarchical fuzzy logic controller is a practical approach for automatic power operations in advanced nuclear power plant applications.