Molten salt reactor waste heat cooling device and method thereof

Abstract

The invention relates to a molten salt reactor waste heat cooling device. According to the device, an air natural circulation system and a molten salt natural circulation system are arranged in an immersed plate type air cooler inside a molten salt pond for heat exchange; the air cooler comprises an air cooler core and an air inlet section and an air outlet section which are respectively positioned at the tail ends of the air cooler core in the horizontal direction; the air cooler core is formed by a plurality of mutually stacked heat conduction plates; the heat conduction plates are welded in pairs at the tail ends in the vertical direction; molten salt channels are formed among adjacent heat conduction plates which are not welded at the tail ends in the vertical direction; the heat conduction plates are welded in pairs at the tail ends in the horizontal direction; air channels are formed among adjacent heat conduction plates which are not welded at the tail ends in the horizontal direction; the molten salt and the air are respectively formed into cross flowing for heat exchange in the molten salt channels and the air channels. The device adopts a passive design idea, no external power is needed, and passive discharge of the waste heat of a molten salt reactor is achieved only through natural circulation of air and the molten salt.

Description

technical field [0001] The invention relates to nuclear equipment in the field of special safety facilities for molten salt reactors, and more particularly relates to a molten salt reactor residual heat cooling device and a method thereof. Background technique [0002] After the nuclear reactor is shut down, due to the remaining fission in the core and the decay of fission products, the heat generated needs to be carried out of the core through a specially designed waste heat removal system. Otherwise, heat accumulation and temperature rise in the reactor may lead to core damage accidents. After the pool-type molten salt reactor is shut down in an accident, the residual heat of the core is carried into the buffer salt in the molten salt pool. A system is also required to passively cool the buffer salt, and an efficient heat exchanger is required to realize the accident condition Under the rapid cooling. [0003] China Experimental Fast Reactor provides a passive waste heat...

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Problems solved by technology

[0010] In order to solve the problem of relatively low heat exchange efficiency in the above-mentioned prior art, the present invention aims to provide a molten salt reactor waste heat cooling device and its method

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