Residual heat removal system for molten salt reactor buffer salt accident

Abstract

The invention provides a residual heat removal system for a molten salt reactor buffer salt accident. The residual heat removal system for the molten salt reactor buffer salt accident system comprises a cooling tower, a main loop system and a salt filling and eliminating system, wherein a natural ventilation heat exchanger is arranged in the air cooling tower; a heater is arranged on the periphery of the natural ventilation heat exchanger; the main loop system is formed by connecting a molten salt pond, a heat tube section, the natural ventilation heat exchanger and a cooling tube section in sequence; a reactor core is arranged in the molten salt pond which is filled with molten salt; one tail ends of the heat tube section and the cooling tube section are respectively immersed in the molten salt in molten salt pond; the highest position of the heat tube section of the main loop system is connected with an expansion tank; the salt filling and eliminating system is connected with the molten salt pond directly. According the system, a passive design concept is adopted, the external power is not required, the passive elimination of the molten salt reactor residual heat under accidental working condition is realized by relaying on the natural circulation of the air and molten salt, besides, the space of the molten salt is saved by the system, and the arrangement of the other components is convenient.

Description

technical field [0001] The invention relates to the technical field of special safety facilities for reactors, in particular to a buffer salt accident waste heat discharge system for molten salt reactors. 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 nuclear safety accidents. After the molten salt reactor is shut down under accident conditions, the residual heat of the core is carried to the buffer salt in the molten salt pool, and a system is also required to cool the buffer salt. [0003] It is the development trend of today's advanced nuclear reactors to adopt the concept of passive safety design. For example, the AP1000 advanced pressurized water reactor designed in the United States ha...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of relatively low heat exchange efficiency and large space occupied by equipment in the above-mentioned prior art, the present invention aims to provide a waste heat discharge system for buffer salt accidents in molten salt reactors

Images