Passive residual heat removal system based on annular air cooler

A passive waste heat and waste heat discharge technology, applied in nuclear power generation, cooling devices, greenhouse gas reduction, etc., can solve problems such as high construction costs, complex liquid metal cooling reactor systems, unsuitable reactor miniaturization, and compact layout.

Active Publication Date: 2021-02-26
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing liquid metal cooling reactor system ...

Method used

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  • Passive residual heat removal system based on annular air cooler
  • Passive residual heat removal system based on annular air cooler
  • Passive residual heat removal system based on annular air cooler

Examples

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Embodiment

[0030] For ease of understanding, two waste heat removal subsystems are taken as examples for illustration. Such as Figure 1-Figure 3 As shown, it includes a first waste heat discharge subsystem and a second waste heat discharge subsystem, and the first waste heat discharge subsystem and the second waste heat discharge subsystem share a make-up water tank 300 .

[0031] Wherein, the first waste heat discharge subsystem includes a first annular air cooler, a first heat exchange device, and inlet electric valves 111 , 121 and outlet electric valves 112 , 122 of the first annular air cooler.

[0032] The second waste heat discharge subsystem includes a second annular air cooler, a second heat exchange device, and inlet electric valves 211 , 221 and outlet electric valves 212 , 222 of the second annular air cooler.

[0033] Specifically, after a normal or emergency shutdown, the shutdown signal triggers the opening of the outlet electric valve 112 or 122 and the inlet electric v...

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PUM

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Abstract

The invention discloses a passive residual heat removal system based on an annular air cooler, which comprises at least two independent residual heat removal subsystems and a shared water supplementing tank; each residual heat removal subsystem comprises a heat exchange device consisting of a heat exchange water tank and a heat exchanger; the annular air cooler is composed of a descending cavity,an air cooling pipe, an upper annular header and a lower annular header, and the annular air cooler is provided with an inlet electric valve and an outlet electric valve; hot gas in the gas cooling pipe serves as an ascending section, cold gas in the descending cavity serves as a descending section, and natural circulation flowing heat exchange is formed between the annular gas cooler and the heatexchange device by means of the density difference and the potential difference of the cold gas and the hot gas, so that residual heat in the reactor core is safely and reliably discharged after thereactor core is shut down normally or accidentally; and the temperatures of the fuel cladding, the pressure vessel and the wall surface of the reactor chamber do not exceed the allowable temperature.

Description

technical field [0001] The invention relates to the technical field of nuclear industry cooling systems, in particular to a passive waste heat discharge system based on an annular air cooler. Background technique [0002] After the nuclear reactor shuts down, due to the remaining fission in the core and the decay of fission products, there will be residual heat in the core and last for a long time. The heat of the core will lead to an increase in the temperature of the core fuel and core coolant, resulting in damage or even melting of the fuel elements, resulting in the release of a large amount of radioactive substances and a nuclear safety accident. Therefore, it is necessary to set up a safety-level waste heat removal system to bring the remaining heat in the core to the final heat sink. Different from pressurized water reactors, liquid metal cooled reactors use metals with low melting points as coolants, such as sodium-potassium alloys, lead-bismuth alloys, etc. These l...

Claims

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Application Information

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IPC IPC(8): G21C15/18G21C15/14
CPCG21C15/18G21C15/14Y02E30/30
Inventor 向清安邓坚卢庆江光明高颖贤刘兆东邓纯锐邱志方刘余张明武小莉陈宝文党高健
Owner NUCLEAR POWER INSTITUTE OF CHINA
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