Sanmen Nuclear Power Ushers in the World's First AP1000 Main Pump

The reporter recently learned from Sanmen Nuclear Power that the world’s first AP1000 main pump has successfully reached three nuclear power stations and has completed site unloading, transfer, unloading, storage, storage and other operations. The on-site storage conditions are fully met and higher than the “main pump”. Storage requirements set forth in the Technical Manual (CPP-MP01-VNM-001).

It is reported that the main pump of Unit 1 of Sanmen Nuclear Power Station was successfully developed by the EMD plant belonging to Curtiss White Fluid Control Company. The last durability test was successfully completed in the United States on April 16 last year, marking the key equipment of this third-generation nuclear motor type. The biggest technical difficulty has been overcome.

The main pump is a key device in the main loop of a nuclear power plant and is called the "heart" of a nuclear power plant. The AP1000 main pump adopts a high-power shielded pump design with a flywheel, which is different from the shaft seal pumps commonly used in other reactor-type nuclear power plants and plays an important role in improving the safety and reliability of nuclear reactor system. The manufacture of the main pump is difficult and the manufacturing cycle is long. Since the beginning of 2009, Sanmen Nuclear Power dispatched equipment supervisors to track the manufacture and testing of the main pump and ensure the quality of the equipment meets the requirements.

Sanmen Nuclear Power started the preparations for the arrival of the main pump in June last year, and successively organized the "Main Pump Attendance Preparation Coordination Meeting" and the "Main Pump Attendance Prerequisite Inspection Meeting."

The Ministry of Science and Technology reported on January 8th that the 973 program “Key Scientific Issues in the Manufacturing of Nuclear Main Pumps” project annual summary report meeting was held in Hangzhou recently. Prof. Lei Mingkai, the chief scientist of the project, and the responsible persons of the projects reported the progress of the project and The results were highly appreciated by the participating experts.

According to reports, the project team conducted a research on the friction, wear, and corrosion of key components under the conditions of high temperature, high pressure, and high radioactivity for the manufacturing of key components of water-lubricated bearings, one of the two core technologies for shielded motor main pumps. Prototype test; set up a simulation test bench for the flow performance principle of nuclear main pump system, quantitatively comparative analysis of the change law of the natural frequency of the rotor of the AP1000 nuclear main pump, constructed a dynamic rotor performance prediction model, and studied material interface transfer and surface evaluation. Based on the theory, the surface protection methods and evaluation methods for nuclear main pump components were established.

The “key scientific issues in the manufacture of nuclear main pumps” project was approved in 2009. This project is closely related to the national targets in the field of nuclear power. The key scientific issues in the manufacture of large-scale advanced pressurized water reactor nuclear pumps are the subject of research. There are seven universities in the United Nations and The nuclear main pump enterprise has deployed eight research projects. Since 2010, the project team has used the AP1000 nuclear main pump as the main target of research according to the development needs of the country's third-generation nuclear power technology and the recommendations of the expert group, adjusted the research content in time, and further emphasized the scientific support of the 973 project for major nuclear power projects. . In April 2012, the research team of the “973 Project” and the “major nuclear power specialization” shielded motor main pump also held a technical exchange meeting and established a joint research point for cooperation.