Completion of World's First Domestic CAP1000 50Hz Canned Motor Reactor Coolant Pump for Guangdong Lianjiang Nuclear Power Phase I

Recently, the world's first domestically manufactured CAP1000 50Hz canned motor reactor coolant pump for the Guangdong Lianjiang Nuclear Power Phase I project was successfully completed and ready for shipment. The completion of this equipment marks significant new progress in the independent development and localization of China's Generation III nuclear power core equipment. Harbin Electric Group provided the canned motor for this reactor coolant pump.

The Guangdong Lianjiang Nuclear Power Phase I project plans to construct two domestically developed CAP1000 Generation III passive pressurized water reactor units, each with a single-unit capacity of 1.25 million kilowatts. The project is based on the independent CAP1000 Generation III passive nuclear power technology, adopts a seawater secondary circulation cooling scheme, promotes the coordinated development of nuclear power development and coastal ecological protection, and serves the green and low-carbon development needs of the Guangdong-Hong Kong-Macao Greater Bay Area.

The canned motor completed this time was developed by Harbin Electric Group's Power Equipment Company, and is a new product launched following the CAP1000 60Hz and CAP1400 canned motors. This product was developed through forward engineering to meet China's 50Hz grid conditions, forming a dedicated 50Hz electromagnetic design scheme that matches the 50Hz rated speed, hydraulic performance, and coastdown flow design requirements, addressing the issue of insufficient compatibility between imported 60Hz equipment and China's grid frequency.

In terms of key technologies, the canned motor adopts a 6kV nuclear-grade insulation system with high radiation tolerance and high-temperature resistance, capable of withstanding high-temperature and radiation conditions inside the motor cavity. The R&D team also optimized the internal flow field structure of the motor to reduce hydraulic friction losses and improve motor operating efficiency.

In terms of manufacturing processes, the project refined processing control, added process internal control standards for key dimensions of water-lubricated bearings, and improved the machining accuracy and dimensional consistency of components. New positioning tooling was adopted in the assembly of the upper thrust bearing to reduce assembly deviations, lower the risk of damage to guide bearing pads from impact, and further improve assembly quality.

Harbin Electric Group stated that it will continue to advance the batch delivery of nuclear power equipment, supporting the enhancement of nuclear power industry equipment capabilities and the construction of new power systems.