The sodium-cooled fast reactor is the most technologically mature fourth-generation nuclear reactor that has been put into commercial operation. China is one of the few countries in the world that have mastered the development of sodium-cooled fast reactors and their key components, and Zhefu Nuclear Power is the first entity in China licensed to manufacture the main circulating pump of the primary circuit of a sodium-cooled fast reactor, which is currently the largest main nuclear reactor pump in the world, as well as the first to achieve desirable performance in supply.  Zhefu Nuclear Power has conquered the ultra-large area carbide welding technology，multi-segment spindle（with high coaxiality）maching technology，and the integral machining technology of large complex centrifugal pump impellers.