High-pressure safety injection pump for nuclear power station

Abstract

A high-pressure safety injection pump relates to the main equipment of a return passage safety injection system of a nuclear power station. When middle or small crevasse water loss accident happens on a main return passage system of a nuclear reactor, the safety injection pump quickly starts and injects water into the nuclear reactor to prevent the accident being more serious and ensuring nuclear reactor safety. The high-pressure safety injection pump comprises an outer cylinder body, an inner shell component, a water inlet and outlet end cover, a two-end support bearing part, a base and corresponding connecting pipelines and is characterized in that the high-pressure safety injection pump is a horizontal type double-shell drawing core type multiple centrifugal pump, and the inlet and the outlet of the pump are vertically upwards. The high-pressure safety injection pump has reasonable structure and good thermal shock resistance and the hydraulic design and the strength design of the high-pressure safety injection pump fully satisfy the requirements for the nuclear power station safety injection system.

Description

technical field [0001] The invention relates to a pump, in particular to a nuclear class II pump used in a nuclear power plant. Background technique [0002] The pressurized water reactor nuclear power plant is a nuclear power plant widely used at present. The high-pressure safety injection pump is the main equipment of the primary circuit safety injection system of the nuclear power plant. When the main circuit system of the reactor has a water loss accident of a medium or small break, the pump should be started quickly. , to inject water into the reactor to prevent the further expansion of the accident and ensure the safety of the reactor. The medium conveyed by the pump during operation is radioactive boron-containing water, which contains a small amount of debris such as concrete, insulation materials, and paint. The pump can withstand a thermal shock of 5°C to 127°C within ten seconds, and can reliably inject water into the reactor while the reactor pressure is gradual...

AI Technical Summary

Problems solved by technology

[0003] Existing commonly used pumps cannot meet the requirements of nuclear power plant high-voltage safety injection systems in terms of stiffness, strength, thermal shock resistance, resistance to impurities in the working medium, sealing performance, and material properties.

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