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Nuclear-grade pump intake filter screen differential pressure protector of PWR nuclear power plant

A technology for nuclear power plants and nuclear-grade pumps, which is applied in the fields of power plant safety devices, nuclear power generation, and greenhouse gas reduction, and can solve problems such as the inability to effectively ensure the safety and availability of nuclear-level important equipment, the stable operation of nuclear power units, and the risk of adult failure

Active Publication Date: 2015-11-11
CHINA NUCLEAR POWER DESIGN COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the monitoring and shutting down or switching off of pumps are all dependent on human beings, there is a great risk of human failure, and it is impossible to effectively ensure the safety and availability of nuclear-level important equipment and the stable operation of nuclear power units.

Method used

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  • Nuclear-grade pump intake filter screen differential pressure protector of PWR nuclear power plant
  • Nuclear-grade pump intake filter screen differential pressure protector of PWR nuclear power plant

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Embodiment Construction

[0019] In order to make the purpose, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0020] see figure 1 and figure 2 As shown, the pressure water reactor nuclear power plant nuclear grade pump inlet filter screen differential pressure protection device of the present invention is connected with the medium pressure panel. A differential pressure switch SP1, a second differential pressure switch SP2, an isolation valve, a first relay XR1, a second relay XR2, and an alarm KA. The medium voltage panel includes the second power supply +48V-DCS, the third relay 001XR, the fourth relay 002XR, the fifth relay 003XR, the CLOSE contacto...

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Abstract

The invention discloses a nuclear-grade pump intake filter screen differential pressure protector of a PWR nuclear power plant. The protector is connected with a middle-voltage plate cabinet, and comprises a first differential pressure switch, a second differential pressure switch, an isolating valve, a first relay and a second relay. The protector is cable of raising the alarm, can automatically stop a pump from running when the filter screen is obstructed severely, is high in the safety level, and can avoid hidden safety hazard caused by manual operation.

Description

technical field [0001] The invention belongs to the field of debugging of nuclear power plants. More specifically, the invention relates to a differential pressure protection device for inlet filter screens of nuclear pumps in pressurized water reactor nuclear power plants. Background technique [0002] In the installation and commissioning stage of nuclear power units, in order to prevent foreign matter in the fluid medium from entering the pump body and affecting the safety and normal operation of the pump, a temporary filter is installed at the inlet. When the unit is running normally and the fluid medium meets the operating requirements, the temporary filter needs to be removed. [0003] Due to the fine density of the filter screen at the pump inlet, impurities in the fluid (water-soluble paper, welding slag, cotton foreign matter, etc.) are intercepted by the filter screen, resulting in a decrease in the flow area, which will reduce the pressure at the pump inlet and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D3/06
CPCY02E30/00
Inventor 李强涛李庚亮李勇张烨亮胥跃谭杞安段盛智杨鹏云
Owner CHINA NUCLEAR POWER DESIGN COMPANY