Nuclear power plant pump

1, the reactor pump The pump reactor directly installed in the nuclear reactor pressure vessel at the bottom of the reactor core to provide cooling water. Submersible motors without a shaft seal seal serve as a drive for increased reliability in order to prevent water leakage from the reactor Hydraulic components (impellers and diffusers) are made of forged material due to the harsh reactor conditions. By NC (nc) machining of the blades, the difference in pump performance can be reduced. Radial and thrust bearings feature tilting pads with excellent load characteristics and vibration stability. Liquid Metal Pump for Rapid Propagation Reactors This is a circulation pump that delivers the primary coolant (liquid metal) to the fbr reactor core. Is a mechanical vertical centrifugal pump that supplies the sodium cycle of a breeder reactor with a flow rate of up to 10 m3 / min. Reactor Coolant Pumps The reactor coolant pump (hereinafter referred to as the main pump) unit is a cardiac device of a PWR nuclear power plant and is currently used in the world Only a few countries can produce main pumping units. In China's nuclear power plants that have now been completed (including the C1 project, but not Qinshan Phase III), the main pumps are all shaft-sealed, but there are two types of rigid connections and flexible couplings. The main pump units produced in the United States, France and Japan belong to The rigid connection, the main pump units produced in Germany, Austria and Russia belong to the flexible connection, all the main pumps are all imported (the main pump for the C1 project only realizes partial localization of parts). 2, condensate pump, high pressure core overflow pump This is a vertical shaft pump with the shell, some shapes designed according to the pit-shaped, in order to increase the suction pressure of the impeller. The pump is often used in high temperature and high earthquake environment. Condensate pump with double-ended mechanical seal. According to inhalation, the first level with double suction impeller. 3, circulating pump, sea water pump to the nuclear reactor or steam boiler to send high-temperature water. As the pump is treated with high-temperature water, the shaft seal uses a sleeve seal, because the sleeve seal performance is reliable, saving maintenance costs. Sleeve seal with intermediate extraction and control of fixed drainage temperature method.

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