Sodium-sodium heat converter

Abstract

The invention disclose an immersion sodium-sodium heat exchanger for sodium-cooled fast reactor, comprising a safety housing, wherein, an outer tube is arranged in the safety housing; an inner tube is arranged in the outer tube; the top of the inner tube is open, while the bottom of the inner tube is communicated with the bottom of the safety housing; the lower part of the safety housing is sealed by an upper tube sheet and a lower tube sheet; a heat exchange pipe bundle is arranged between the upper tube sheet and the lower tube sheet; the inlet of the heat exchange pipe bundle is communicated with the bottom of the safety housing, while the outlet is communicated with a sodium outlet; an inlet grate is arranged at the upper part of the sealing section between the upper tube sheet and the lower tube sheet, while an outlet grate is arranged at the lower part. The invention has the advantages that heat exchange of a loop and an intermediate loop in an emergency residual heat release system by means of natural circulation, so as to release the residual heat of the reactor core in the sodium pool and ensure the safety of the reactor core.

Description

technical field [0001] The invention belongs to the technical field of reactor emergency cooling devices, and in particular relates to an immersed sodium-sodium heat exchanger for a sodium-cooled fast reactor. Background technique [0002] In order to ensure the safety of the reactor, the safety system of the pool-type sodium-cooled fast reactor needs to install a special heat exchanger in addition to the accident waste heat discharge system, which can transfer the remaining heat released by the core in the sodium pool to Sodium in the intermediate circuit of the accident waste heat removal system. The principle of the heat exchanger is relatively simple, which is to exchange heat through the reverse flow of two media. Usually, the heat exchanger used requires external power, but the heat exchanger required for the waste heat export of the pool-type sodium-cooled fast reactor is passive, relying on the temperature difference between the upper and lower layers to achieve nat...

AI Technical Summary

Problems solved by technology

Generally, the heat exchanger used needs external power, but the heat exchanger required for the waste heat export of the pool type sodium-cooled fast reactor is passive, relying on the temperature difference between the upper and lower layers to achieve natural convection flow heat exchange, the current heat exchanger technology Not yet reported in the public literature

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