Passive cooling system and method for cooling channel shared by multiple media and reactor

A passive cooling and cooling channel technology, used in reactors, cooling devices, nuclear power generation, etc., can solve the problem of large space, achieve high reliability, simple system structure, and improve safety and reliability.

Pending Publication Date: 2021-07-20
国科中子能(青岛)研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above three traditional accident waste heat removal systems adopt gravity-driven natural circulation, which requires a high height difference to generate sufficient driving force, so they occupy a large space

Method used

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  • Passive cooling system and method for cooling channel shared by multiple media and reactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a passive cooling system of a multi-media shared cooling channel in this embodiment includes a core vessel 5 and a shielding box 4, and an ascending cooling channel 6 is arranged around the outer wall of the core vessel 5, and the ascending cooling The channel 6 is an annular channel arranged around the core container 5, and the upper end of the ascending cooling channel 6 is provided with an outlet 9; the shielding box 4 is arranged outside the ascending cooling channel 6, and the shielding box 4 contains There is a liquid cooling medium, the upper end of the shielding box 4 is connected to an inlet channel 8, and an inlet valve 7 is installed on the inlet channel 8, and the lower end of the shielding box 4 communicates with the bottom of the rising cooling channel 6 through the bottom pipeline 2, A bottom valve 3 is installed on the bottom pipeline 2 .

[0034] When the passive cooling system of the multi-medium shared cooling channel of th...

Embodiment 2

[0038] Such as figure 1 As shown, a passive cooling system of a multi-media shared cooling channel in this embodiment includes a core vessel 5 and a shielding box 4, and an ascending cooling channel 6 is arranged around the outer wall of the core vessel 5, and the ascending cooling The channel 6 is an annular channel arranged around the core container 5, and the upper end of the ascending cooling channel 6 is provided with an outlet 9; the shielding box 4 is arranged outside the ascending cooling channel 6, and the shielding box 4 contains There is a liquid cooling medium, the upper end of the shielding box 4 is connected to an inlet channel 8, and an inlet valve 7 is installed on the inlet channel 8, and the lower end of the shielding box 4 communicates with the bottom of the rising cooling channel 6 through the bottom pipeline 2, A bottom valve 3 is installed on the bottom pipeline 2 .

[0039] Such as figure 1 As shown, the passive cooling system of the multi-media shared...

Embodiment 3

[0049] A passive cooling method for a multi-media shared cooling channel in this embodiment includes the following steps:

[0050] S1, under normal circumstances, the inlet valve 7 and the bottom valve 3 are in the energized and closed state; in the early stage of use, the bottom valve 3 and the inlet valve 7 are opened, so that the liquid cooling medium in the peripheral shielding box 4 of the core vessel 5 is under the action of gravity The water is injected into the ascending cooling passage 6 on the outer surface of the core vessel 5 through the bottom pipe 2, and the high-temperature outer wall of the core vessel 5 heats the water into water vapor, which flows into the atmosphere through the outlet at the upper end of the ascending cooling passage 6 In the process, the heat in the core is taken away by the evaporation of the liquid cooling medium outside the core vessel 5 to cool the core;

[0051] S2, in the later stage of use, after the water in the shielding box 4 evap...

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PUM

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Abstract

The invention relates to a passive cooling system and method for a cooling channel shared by multiple media and a reactor, the passive cooling system comprises a reactor core container and a shielding box, the periphery of the outer side wall of the reactor core container is provided with an ascending cooling channel, the ascending cooling channel is an annular channel arranged around the reactor core container, and an outlet is formed in the upper end of the ascending cooling channel; the shielding box is annularly arranged on the outer side of the ascending cooling channel, a liquid cooling medium is contained in the shielding box, the upper end of the shielding box is connected with an inlet channel, an inlet valve is installed on the inlet channel, and the lower end of the shielding box is communicated with the bottom of the ascending cooling channel through a bottom pipeline; and a bottom valve is mounted on the bottom pipeline. The passive cooling system of the cooling channel shared by the multiple media has the advantages of being non-active, high in reliability, ultra-small, high in economical efficiency and capable of achieving continuous cooling.

Description

technical field [0001] The present invention relates to related fields such as design technology and safety technology of nuclear reactors and thermal energy fields, specifically relates to the discharge of core waste heat in small nuclear reactors and other thermal energy fields that require long-term cooling of core containers, and particularly relates to a multi-medium shared cooling channel. Active cooling systems, methods, and reactors. Background technique [0002] In a nuclear reactor, the waste heat of the core is taken away through the forced circulation of the first and second loops in the normal shutdown state. In the event of accidents such as earthquakes, power outages, and failure of the secondary circuit, the residual heat of the core cannot be exported through the primary and secondary circuits. In order to smoothly export the waste heat from the core and avoid the melting of the fission fuel in the core, it is necessary to set up an accident waste heat remo...

Claims

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Application Information

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IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 不公告发明人
Owner 国科中子能(青岛)研究院有限公司
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