Accident decay heat discharge system for non-symmetric distribution of large pool type sodium-cooled fast reactors

Abstract

The invention relates to an accident decay heat discharge system for non-symmetric distribution of large pool type sodium-cooled fast reactors. The accident decay heat discharge system comprises an independent heat exchanger, and a through heat exchanger, wherein the independent heat exchanger is arranged in a heat sodium pool, the through heat exchanger is arranged between a cold sodium pool and the hot sodium pool, the independent heat exchanger, and the through heat exchanger are respectively connected with a sodium-air heat exchanger through a pipeline, the sodium-air heat exchanger is arranged outside the reactors, and the position of the sodium-air heat exchanger is higher than the independent heat exchanger and the through heat exchanger; when an accident happens, inlet baffles of the independent heat exchanger and the through heat exchanger are opened, hot sodium enters the independent heat exchanger and the through heat exchanger, sodium flowing through the independent heat exchanger sinks in clearances of a fuel assembly in the hot sodium pool, to form inter-box flow; the sodium flowing through the through heat exchanger forms a channel in a fuel assembly box to form an intra-box flow. The discharge of reactor decay heat can be realized by adopting a passive working principle.

Description

technical field [0001] The invention belongs to the design technology of sodium-cooled fast reactors, in particular to an accident waste heat discharge system for asymmetric arrangement of large-scale pool-type sodium-cooled fast reactors. Background technique [0002] The accident waste heat removal system is one of the most important special safety facilities of the pool-type sodium-cooled fast reactor. The release of radioactive material to the surrounding environment plays an important role. Under reactor accident conditions, there are many ways to discharge waste heat from the core, such as active form and passive form. From the analysis of the path of waste heat discharge, there are also many options, such as the primary circuit layout in pool-type fast reactor , The layout of the secondary circuit, etc. In order to improve the reliability design of the system and the safe operation of the reactor, the passive system design and layout is an important development dire...

AI Technical Summary

Problems solved by technology

This waste heat removal scheme not only ensures the economy of the reactor under normal operating conditions, but also ensures the safety of the reactor under accident conditions, but this scheme has never been operated on a reactor, and there are still many uncertainties

[0008] It can be seen from the above introduction that various countries have proposed different solutions to solve the problem of waste heat removal system devices, some using active methods, some using passive methods, or a combination of several methods, but there are The operating cost of the reactor is relatively high, and problems such as the economical operation under normal conditions and the waste heat discharge function under accident conditions have not been taken into account

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