China's Hongyanhe Nuclear Power Completes First P320 Localization Retrofit

The turbine control and regulation system serves as the core brain and neural center for the operation and regulation of nuclear power turbine units. Its core technology has long been monopolized by foreign entities. Issues such as closed core algorithms, opaque technical logic, discontinued spare parts, lagging foreign service, and persistently high operation and maintenance costs have become "pain points" hindering efficient unit operation and maintenance.

To completely eliminate technological dependence and solidify the foundation for independent and controllable equipment, the Engineering Transformation Department of Hongyanhe Company led the establishment of a special task force to fully initiate the P320 localization retrofit. The project team systematically dismantled technical challenges, conducting comprehensive analysis and verification of hardware architecture, software logic, control algorithms, and interlock protection. After numerous simulation exercises, integration validations, and functional debugging, they successfully overcame core technical difficulties. Post-retrofit, the system's key performance indicators, such as unit speed control accuracy and primary frequency regulation response efficiency, have comprehensively surpassed those of the original imported system.

Leveraging the complete practical experience from the first unit retrofit, the project team systematically organized key control points across the entire process, establishing a full lifecycle standardization system covering scheme planning, equipment management, construction implementation, commissioning verification, risk prevention, and acceptance inspection. A total of 29 construction procedures, contingency plans, and technical specifications have been developed, creating a replicable P320 localization retrofit solution.