Metal cooling fast reactor

By designing a metal cooling fast reactor, the special structure of the intermediate heat exchanger is used to realize the natural circulation of metal coolant in the accident situation, the problem of difficulty in discharge of waste heat from the core after the nuclear reactor is shut down is solved, and the safety and stability of the reactor are improved.

CN119724639APending Publication Date: 2025-03-28CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Application Number
CN202411899592.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing accident waste heat discharge system cannot effectively discharge the remaining heat of the core after the nuclear reactor is shut down, affecting the safety of the reactor.

Method used

A metal cooling fast stack is designed, including a stack container, a stack core assembly, a stack member, a first-circuit main pump, an intermediate heat exchanger and a second-circuit main cooling system. The plane in the heat exchanger of the intermediate heat exchanger is higher than the plane in the active area of ​​the core assembly, ensuring that when the main pump in the first circuit fails, the metal coolant can circulate spontaneously and flow naturally into the intermediate heat exchanger, forming a non-active natural cycle, and discharge the waste heat from the reactor.

Benefits of technology

In the case of accidents, the metal-cooled fast reactor can discharge the waste heat of the core assembly through natural circulation, improve the safety of the reactor, and has high stability because the circulation process is non-active.

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Abstract

The embodiment of the invention relates to the technical field of nuclear reactors, in particular to a metal cooling fast reactor which comprises a reactor container, a reactor core assembly, reactor internals, a primary loop main pump, an intermediate heat exchanger and a secondary loop main cooling system. The reactor container is used for containing a metal coolant, and the side wall of the reactor container is provided with a liquid outlet connector and a liquid return connector. And the reactor core assembly is arranged in the reactor container through the reactor internals. The primary loop main pump, the intermediate heat exchanger and the secondary loop main cooling system are arranged outside the reactor container, and the primary loop main pump is used for pumping a metal coolant from the liquid outlet interface to the intermediate heat exchanger and returning the metal coolant to the reactor container through the liquid return interface after heat exchange so as to cool the reactor core assembly. And the middle plane of the heat exchange tube of the middle heat exchanger is higher than the middle plane of the active area of the reactor core assembly. According to the metal cooling fast reactor provided by the embodiment of the invention, the metal coolant can naturally and circularly flow between the intermediate heat exchanger and the reactor core assembly under an accident condition, and waste heat of the reactor core assembly is discharged.
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