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A filter for emergency core cooling system with both filtering and drainage functions

An emergency core and cooling system technology, which is applied to fixed filter element filters, reactors, filtration and separation, etc., can solve the problems of small self-priming pump flow, prolonged drainage time, and influence on the progress of refueling of nuclear power plants, so as to avoid The effect of clogging

Active Publication Date: 2022-02-18
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution also needs to increase the cost, and the flow rate of the self-priming pump installed is small, resulting in prolonged drainage time, which may affect the refueling schedule of the nuclear power plant

Method used

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  • A filter for emergency core cooling system with both filtering and drainage functions
  • A filter for emergency core cooling system with both filtering and drainage functions
  • A filter for emergency core cooling system with both filtering and drainage functions

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Embodiment Construction

[0046] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0047] Such as figure 2 As shown, the core design of the present application is based on the traditional ECCS filter, which adds pit mouth groove 10 and sinking filter assembly 11 .

[0048] The ECCS filter includes an upper filter assembly 2 installed at the bottom of the built-in refueling water tank 1 , a pumping sump 3 installed below the built-in refueling water tank 1 , and a submerged filter assembly 11 located in the pumping sump 3 .

[0049] The upper filter assembly 2 includes an equipment support leg 2-3 installed on the bottom surface 1-1 of the built-in refueling water tank, a filter screen flow channel 2-2 installed through the equipment support leg 2-3 and a pit mouth flow channel 2-4, installed on The filter screen 2-1 on the filter screen flow channel 2-2 and the pit mouth flow channel 2-4; the connecting piece 2-5 is installed at th...

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Abstract

The invention belongs to the design and manufacture of nuclear power plant equipment, and specifically relates to a filter for an emergency core cooling system that takes into account both filtering and drainage functions, including an upper filter assembly and a pumping sump. The upper filter assembly includes a flow channel and a filter screen. There is a gap between the replacement material tanks, and a sinking filter assembly is installed inside the pump intake pit. The upper end of the pump intake pit is provided with a pit mouth. The length and width of the pit mouth are larger than the pit mouth of the pump intake pit. Lower than the bottom surface of the built-in refueling water tank, the sunken filter assembly is lower than the bottom surface of the built-in refueling water tank; this device can provide low water level water to enter the pump to take water when the water level in the built-in refueling water tank is lower than the lowest point of the upper filter The channel of the pit is further discharged by the safety system pump and transported to the reactor refueling pool to meet the needs of refueling or maintenance.

Description

technical field [0001] The invention belongs to the design and manufacture of nuclear power plant equipment, in particular to a filter for an emergency reactor core cooling system. Background technique [0002] Hualong One is an advanced nuclear power plant that meets the technical standards of third-generation nuclear power. Compared with the original second-generation or second-generation plus nuclear power plant, a major technical improvement of Hualong One is the installation of a refueling water tank inside the containment, which can be used during normal operation. Accommodate the water source required for refueling, and can assume the function of the recirculation sump after a high-energy pipeline breach accident. Setting the refueling water tank inside the containment can better resist external threats such as the impact of commercial large aircraft, and second, eliminate the requirement to switch the water source from the refueling water tank to the recirculation pi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C15/18G21C15/14G21C15/12B01D35/02B01D29/50
CPCG21C15/182G21C15/14G21C15/12B01D35/02B01D29/50Y02E30/30
Inventor 邢继黄若琳荆春宁杨理烽薛卫光龚钊王晓江朱京梅张卫赵斌朱明华宋祉霖孙超杰陆洋李栋梁
Owner CHINA NUCLEAR POWER ENG CO LTD
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