Performance assessment for the water level control system in steam generator of the nuclear power plant

Highlights: ► We consider the two PI controller steam generator water level control systems. ► We develop performance assessment methods for plants with stable and unstable zeros. ► The examples show the effectiveness of the proposed method. - Abstract: The steam generator water level control system is the most important components of a nuclear power plant. The operating steam generator water level control system is increasingly recognized as a capital asset that should be routinely maintained and monitored. However, the control loop performance assessment is still an open problem; thus, the performance assessment technology will be brought into the steam generator water level control system in nuclear power plants. Performance assessment methods for the plant with stable and unstable zeros of two PI controller systems are developed at all specific power levels. The numerical examples will demonstrate the effectiveness of the proposed method.