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Passive and active spent fuel pool air cooling system

A spent fuel pool and air cooling system technology, applied in the field of nuclear safety, can solve the problems of large water demand, unfavorable long-term maintenance of spray cooling, low spray water utilization efficiency, etc., and achieve the effect of small spray water and reduced water source demand

Pending Publication Date: 2022-03-22
CHINA NUCLEAR POWER ENG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

Therefore, the design of AP1000 has a very low utilization efficiency of spray water and requires a large amount of water, which is not conducive to the long-term maintenance of spray cooling

Method used

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  • Passive and active spent fuel pool air cooling system

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0025] figure 1 It shows the schematic layout of the passive and active spent fuel pool air cooling system provided by the present invention. The system includes a spent fuel storage pool installed in the fuel building 1 outside the containment. The spent fuel storage pool is divided into short-term unloaded spent fuel storage Area 2 and long-term spent fuel storage area 3, short-term spent fuel storage area 2 for storage of high decay power level short-term spent fuel assemblies, and long-term spent fuel storage area 3 for storage of low decay power levels long-term unloading of spent fuel assemblies.

[0026] An air cooling channel 4 is arranged outside the fuel plant 1, the air cooling channel 4 includes an air inlet 8 and an air baffle 9, the lowest position of the air inlet 8 is higher than the water level of the fuel pool in the fuel plant 1...

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Abstract

The invention relates to a passive and active spent fuel pool air cooling system, and belongs to the technical field of nuclear safety, the system comprises a spent fuel storage pool arranged in a fuel plant, and the interior of the spent fuel storage pool is divided into a short-term discharged spent fuel storage area and a long-term discharged spent fuel storage area; an air cooling channel is arranged outside the fuel plant, and a circulating fan for enhancing air flow is arranged in the air cooling channel; and each set of cooling system comprises a heat exchanger positioned in the fuel plant and an air radiator positioned in an air cooling channel outside the fuel plant. Cooling of the spent fuel assembly can be guaranteed under the normal and accident working conditions, cooling of the low-power-level spent fuel assembly is guaranteed through air cooling under the extreme accident working condition (pool bottom crevasse), and cooling of the high-power-level spent fuel assembly is guaranteed through local spraying.

Description

technical field [0001] The invention belongs to the technical field of nuclear safety, in particular to a passive and active spent fuel pool air cooling system. Background technique [0002] The nuclear power plant spent fuel pool is used to store the new fuel before entering the reactor and the spent fuel discharged from the core, and the follow-up operation will be carried out after the decay heat and radioactivity are reduced to a certain level. Because the spent fuel contains highly radioactive fission products, while still having a large amount of fissile material, and continues to generate decay heat, the spent pool performs three main functions: cooling the fuel assemblies to prevent them from overheating due to decay heat; shielding the interior of the pool Radioactivity of spent fuel, protection of operators and the public from radiation hazards; prevention of criticality accidents. [0003] As early as 1974, the U.S. Atomic Energy Commission put forward the famous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/02G21C15/06G21C15/18G21C19/07
CPCG21C15/18G21C15/182G21C15/02G21C15/06G21C19/07Y02E30/30
Inventor 杨长江黄树亮李呼昂周潇董建华汪俊
Owner CHINA NUCLEAR POWER ENG CO LTD
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