Jiangsu Haifa Machinery Manufacturing Co., Ltd.

In August 2026, the's first domestically produced CAP1000 50Hz canned motor reactor coolant pump completed manufacturing and entered the shipping stage, marking further progress in the independent development of core rotating equipment for China's third-generation nuclear power. The pump features a native 50Hz design that can directly match the domestic standard power grid without relying on an additional variable-frequency system, and it passed a 92-day engineering endurance test. The reactor coolant pump is known as the "heart" of the reactor primary loop, responsible for driving high-temperature, high-pressure coolant to circulate continuously between the reactor pressure vessel and the steam generator. Canned motor reactor coolant pumps employ technologies such as Canned Motor Reactor Coolant Pump, Sealless Design, Water-Lubricated Bearing, Rotor Dynamics, and High-Pressure Boundary Integrity, placing extremely high demands on materials, containment shells, electromagnetic design, bearing clearances, and long-term reliability. According to public information from Shengu Group, during the development of the CAP1400 canned motor main pump, flow rate increased by approximately 21% compared with AP1000, while the operating frequency was adjusted 60Hz to Hz, and hydraulic, rotor dynamics, bearing, and material designs were redone. In addition to main pumps, nuclear power plants also require large numbers of Safety Injection Pump, Residual Heat Removal Pump, Component Cooling Water Pump, Condensate Pump, Feedwater Pump, and auxiliary pumps for the chemical and volume control system. Electric-KSB has already supplied residual heat removal pumps, charging pumps, safety injection and spray pumps, and other nuclear-grade and non-nuclear-grade pumps for projects such as Hualong One, which also shows that the nuclear power pump market is far broader than just main pumps. Jiangsu Haifa Machinery Manufacturing Co., Ltd. www.jslgpump.com can build on its existing API 610 OH, BB, and VS series, canned motor pumps, magnetic drive pumps, and high-pressure multistage pump platforms to focus on extending into nuclear power conventional island and auxiliary. For example, BB5 can be used for high-pressure feedwater and booster applications, the VS series is suitable for condensate and low-NPSH conditions, while canned motor pumps and magnetic drive pumps are suitable for chemical medium systems with high leakage control requirements. In the future, competition in nuclear power pumps will upgrade from single-unit localization to Nuclear-Grade Pump Reliability, 60-Year Design Life, Condition Monitoring, Sealless Nuclear Pump, Lifecycle Qualification. The real threshold is not just being able to manufacture it, but being long-term verifiable, traceable, and maintainable Chinese References: 1. Shengu Group: "Tackling the Nuclear Power 'Heart' Equipment — The World's First Domestically Produced CAP1000 50Hz Canned Motor Reactor Coolant Pump Successfully Completed," August 202. 2 China General Machinery Industry:The World's First Domestically Produced CAP100050Hz Canned Motoror Coolant Pump Completed Shipped at Shengu Group," 2026. 3 Shengu Group: "Canned Motor Nuclear Main Pump Project Team Awarded the National Worker Pioneer Title," 2026 — introducing the CAP1400 main pump 50Hz, hydraulic model, rotor dynamics, and bearing design. 4. Nuclear Engineering Research and Design Institute: "AP1000 Canned Motor Pump Manufacturing Technology and CAP1400 Canned Motor Reactor Coolant Pump Development Project Passed Acceptance." English References: . World Bearing News, Global First Domestically Manufactured CAP1000 50Hzanned Motor Reactor Coolant Pump Completed and Shipped, 6. 2.inghouse, Reactor Coolant Pumps (RCPs) — coolant pump operation, refurbishment and lifecycle service. 3 Westinghouse, AP0 Operations and Maintenance — variable-speed canned-motor reactor coolant pump operating characteristics. 4.SB, Shanghai Electric-KSB Nuclear Pumps and Valves nuclear main pumps, residual heat removal pumps, charging pumps and safety injection

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