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Hydraulic design method of high-cavitation-resistance nuclear main pump impeller and high-cavitation-resistance nuclear main pump impeller

A technology of hydraulic design and nuclear main pump, which is applied to parts, pumps, and pump components of pumping devices used for elastic fluids, and can solve problems such as pipeline rupture, pipeline pressure changes, and water loss accidents, and improve safety Performance and stability, high cavitation resistance, excellent hydraulic performance

Inactive Publication Date: 2014-04-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When an earthquake or severe vibration occurs, the pipeline pressure of the reactor cooling system changes, which may cause the rupture of the pipeline, resulting in a loss of water accident
In the loss of water accident, the fluid in the nuclear main pump changes from single phase to multi-phase. Compared with the single fluid phase, the working performance of the nuclear main pump will be greatly reduced under the gas-liquid two-phase, which will further make the nuclear main pump The pump cannot work normally, resulting in a nuclear accident

Method used

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  • Hydraulic design method of high-cavitation-resistance nuclear main pump impeller and high-cavitation-resistance nuclear main pump impeller
  • Hydraulic design method of high-cavitation-resistance nuclear main pump impeller and high-cavitation-resistance nuclear main pump impeller
  • Hydraulic design method of high-cavitation-resistance nuclear main pump impeller and high-cavitation-resistance nuclear main pump impeller

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0026] The hydraulic design method of the high-cavitation-resistant nuclear main pump impeller of the present invention adopts the method of increasing the rotating speed of the nuclear main pump to improve the head of the nuclear main pump that drops sharply under the loss of water accident; the selected nuclear main pump rotating speed is 1800r / min , to increase the pressure at the inlet of the nuclear main pump in case of a loss of water accident. The specific speed is selected according to the following theory: when the specific speed is too low, the flow rate decreases and the head is too high. However, in a loss of water accident, the nuclear main pump needs to provide a large flow in a short time to take away the heat of the core, thereby reducing the possibility o...

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Abstract

The invention provides a hydraulic design method of a high-cavitation-resistance nuclear main pump impeller and the high-cavitation-resistance nuclear main pump impeller. According to the design method, an inlet diameter Dj, an outlet diameter D2 and a blade outlet width b2 are determined by selecting proper rotation speed and proper specific speed so as to improve the flow state and improve cavitation resistance and hydraulic performance of the nuclear main pump impeller. The high-cavitation-resistance nuclear main pump impeller designed through the method can provide high flow in a short time to bring away heat of a reactor core, so that the probability of nuclear accidents is reduced. The high-cavitation-resistance nuclear main pump impeller has excellent hydraulic performance, has high cavitation resistance under coolant loss accidents, and therefore improves operation safety and stability of a nuclear main pump under the coolant loss accidents.

Description

technical field [0001] The invention belongs to the field of fluid machinery design, in particular to a hydraulic design method of a nuclear main pump impeller with high cavitation resistance under a dehydration accident. Background technique [0002] Reactor coolant circulation main pump, referred to as the nuclear main pump, is an important part of the reactor cooling system (referred to as "RCP"), the only rotating equipment in the nuclear island reactor, and an important part of the pressure boundary of the primary circuit, which belongs to nuclear safety Class I equipment. When an earthquake or severe vibration occurs, the pipeline pressure of the reactor cooling system changes, which may cause the rupture of the pipeline, thereby causing a loss of water accident. In the loss of water accident, the fluid in the nuclear main pump changes from single phase to multi-phase. Compared with the single fluid phase, the working performance of the nuclear main pump will be great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18F04D29/66
Inventor 王鹏袁寿其王秀礼
Owner JIANGSU UNIV
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