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Passive cooling system and method in underground nuclear power station built-in cooling tower type containment

A passive cooling and containment technology, applied in the field of nuclear power, can solve problems such as the limitation of containment size and space, the infeasibility of air cooling outside the containment, and the disadvantage of simplifying the nuclear power plant system, so as to achieve simplified system redundancy, Guarantee the effect of completeness and inclusiveness

Pending Publication Date: 2021-10-29
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The containment spray system realizes the spray cooling function in the containment through the spray pump, and the power supply is required to ensure the start-up of the system under accident conditions, which puts forward high reliability and redundancy requirements for the system, which is not conducive to Simplify the nuclear power plant system, especially the underground nuclear power plant, the size of the containment is limited by the size of the underground cavern, and it is difficult to implement the containment spray system
The containment shell of an underground nuclear power plant is located in the underground cavern, and the natural convection of the atmosphere cannot be used to achieve passive containment cooling, so the air cooling method outside the containment is not feasible

Method used

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  • Passive cooling system and method in underground nuclear power station built-in cooling tower type containment
  • Passive cooling system and method in underground nuclear power station built-in cooling tower type containment
  • Passive cooling system and method in underground nuclear power station built-in cooling tower type containment

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Embodiment 1

[0047] In this embodiment, the containment of an underground nuclear power plant adopts a single-column underground nuclear power plant built-in cooling tower-type passive cooling system in the containment, that is, there is one cylindrical through hole 5.1.

[0048] like figure 1 As shown, the passive cooling system in the built-in cooling tower type containment of the single-column underground nuclear power plant in this embodiment includes a high-level emergency cooling pool 1, a cooling water flow distribution loop 2, a built-in cooling tower in the containment, and a cooling water recirculation heat dissipation system 4. .

[0049] The elevation of the bottom of the high-level emergency cooling pool 1 is greater than the elevation of the cooling water flow distribution loop 2, and the water capacity of the pool is at least greater than the water consumption for 72 hours when the cooling system is turned on at 100% flow rate.

[0050] The inlet of the cooling water flow d...

Embodiment 2

[0064] like Figure 4 As shown: the structure and operation process of this embodiment are basically the same as those of Embodiment 1, the difference is: the containment of an underground nuclear power plant in this embodiment adopts passive cooling in the built-in cooling tower type containment of a multi-column underground nuclear power plant The system, that is, there are multiple columnar vias 5.1.

[0065] In this embodiment, the steel containment of the passive cooling system in the built-in cooling tower containment of the multi-column underground nuclear power plant is provided with a plurality of upper and lower through holes (ie, cylindrical through holes 5.1), and each upper and lower through hole (ie, cylindrical through holes 5.1) Cooling device 3 can be provided.

[0066] Figure 5 The position of the upper and lower through holes of the passive cooling system containment in the built-in cooling tower containment of the multi-column underground nuclear power p...

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Abstract

The invention discloses a passive cooling system in a passive cooling system and method in underground nuclear power station built-in cooling tower type containment. The system comprises a high-position emergency cooling water tank, a cooling water flow distribution loop, a cooling device and a cooling water recirculation heat dissipation system; the containment is a cylindrical sealed shell internally provided with a vertical columnar through hole; a cooling device is arranged in the columnar through hole; the bottom elevation of the high-position emergency cooling water tank is greater than that of the cooling water flow distribution loop; and the high-level emergency cooling water tank, the cooling water flow distribution loop, the cooling device and the cooling water recirculation heat dissipation system are sequentially connected to form a closed loop. With the passive cooling system adopted, the passive cooling function of the underground nuclear power station containment can be realized. The invention also discloses a cooling method of the passive cooling system in the underground nuclear power station built-in cooling tower type containment.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a passive cooling system in a built-in cooling tower-type containment shell of an underground nuclear power plant. The invention also relates to a passive cooling method in a built-in cooling tower-type containment of an underground nuclear power plant, more specifically, the cooling method of the passive cooling system in the built-in cooling tower-type containment of an underground nuclear power plant. Background technique [0002] As the fourth barrier of a nuclear power plant, the integrity of the containment under accident conditions is crucial to the safety of the entire nuclear power plant. In the event of LOCA or rupture of the steam pipeline in the containment, high-temperature and high-pressure steam is sprayed into the containment, which increases the pressure and temperature in the containment, which may cause overpressure damage to the containment, resulting in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/12G21C15/14G21C15/18
CPCG21C15/12G21C15/14G21C15/18Y02E30/30
Inventor 钮新强袁博喻飞苏毅刘爽刘凯汪建肖固城陈玉梅邓超
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES