Nuclear three-level residual heat removal pump for AP1000 nuclear power station

Abstract

The invention discloses a nuclear three-level residual heat removal pump for a third-generation AP1000 nuclear power station, which comprises a stator part, a rotor part, a coupling part, a sealing part, a cooling system part and an electric motor. The nuclear three-level residual heat removal pump is characterized in that the residual heat removal pump is a vertical single-stage single-suction rear-opening centrifugal pump; a structure of sucking upward along the axial direction and horizontally and radially discharging is adopted in the pump; the motor is fixed on a motor bracket; the stator part is connected with a base by pump body foot plates; the rotor part is connected with the motor by the coupling part; in the overhauling process, an inlet and outlet pipeline does not need to be disassembled; when the mechanical seal is overhauled, the electric motor can be not disassembled; a pump unit is convenient to maintain; the shafting rigidity is good; the integral strength is high; and the requirement on a residual heat removal system for the nuclear power station is totally met.

Description

technical field [0001] The invention relates to a pump, in particular to a nuclear three-stage waste heat discharge pump used in the third-generation AP1000 nuclear power plant. Background technique [0002] The third-generation AP1000 nuclear power plant is currently the most advanced commercial nuclear power plant in the world. The main function of the residual heat removal system (RNS) is to remove the heat from the reactor coolant system through pumps and heat exchangers during the shutdown of the power plant. The waste heat removal pump is the only nuclear-grade pump except the main pump, and it is an important equipment of the waste heat removal system (RNS), used to support core cooling and low-pressure injection functions. The main functions are as follows: [0003] (1) Non-safety-related functions [0004] 1. Normal cooling; 2. Refueling and drainage; 3. Shutdown purification; 4. RCS vacuum water cooling; 5. Spent fuel pool cooling; 6. I RWST cooling. , then stop...

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