Inducer for containment spraying pump

Abstract

The invention discloses an inducer for a containment spraying pump in the field of nuclear power equipment, which is composed of an inducer body and a shaft sleeve. The inducer body is composed of a hub and an outer edge arranged on the circumference of the hub, and the outer edge is defined by two spiral-shaped blades surrounding the circumference of the hub in spiral mode. Both the hub and the shaft sleeve are hollow, and the shaft sleeve is sleeved at the top end of the hub. The inducer for the containment spraying pump has the advantages that due to the fact the axial length of the hub is reduced, the difficulties for controlling the concentricity is reduced when the inducer is processed, the processing quality of the inducer is improved, cavitation corrosion resistance of each grade impeller above the inducer is improved, and stable operation of the containment spraying pump is ensured, so that safe operation of a nuclear island pressurized water reactor and effective handling of faults of the nuclear island pressurized water reactor are ensured.

Description

technical field [0001] The invention relates to an inducer used for a containment spray pump in the field of nuclear power equipment. Background technique [0002] The pressurized water reactor nuclear power plant is the main form of nuclear power plant at present. In order to prevent the water from boiling inside the core of the pressurized water reactor nuclear island, the water must be kept under high pressure. The PWR nuclear island includes nuclear steam supply system, containment spray system and auxiliary system. [0003] The containment spray system consists of two independent pipelines. Each pipeline system is composed of spray pumps, coolers, nozzles, refueling water tanks, valves and other equipment. The containment is the last barrier to prevent fission products from fuel and primary radioactive materials from entering the environment. When a safety accident occurs, the high-temperature and high-pressure water in the primary circuit flows into the containment,...

AI Technical Summary

Problems solved by technology

Secondly, the induction wheel in the past is a forging, which must be processed by a five-axis CNC machining center. However, when the five-axis CNC machining center is processed, it has very high requirements for the concentricity of the processing.

This pair of contradictions affects the improvement of the processing quality of the induction wheel

The processing quality of the inducer is not high, resulting in cavitation of the impellers at all stages above the inducer, which will affect the stable operation of the containment spray pump, thereby affecting the safe operation of the nuclear island pressurized water reactor and the island pressurized water Efficient Handling of Heap Faults

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