Passive residual heat removal system for high temperature gas cooled reactor

Abstract

The invention relates to the technical field of safety facilities of a reactor, and discloses a passive residual heat removal system for a high temperature gas cooled reactor. The system comprises a plurality of sets of independent residual heat removal sequences, wherein each set of residual heat removal sequence comprises a water cooled wall (1), an air cooler (5), an air cooling tower (6), a reactor pressure vessel (7) and a reactor cabin (8); the water cooled wall (1) is positioned in the reactor cabin (8) and encircles the reactor pressure vessel (7); the installation position of the air cooling tower (6) is higher than that of the water cooled wall (1); and the air cooler (5) is arranged in the air cooling tower (6). A simple passive residual heat removal system is designed by utilizing a passive safety design concept and a little equipment, is only dependent on natural circulation when operated, is not required to be driven by any external force, and is provided with respective independent redundant circulation loops, so that the system is prevented from failing due to the failure of an active part, and the operation safety of the reactor is improved.

Description

technical field [0001] The invention relates to the technical field of reactor safety facilities, in particular to a passive residual heat discharge system for a high-temperature gas-cooled reactor. 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 residual heat generated is still considerable for a long period of time, and it needs to be carried out to the final heat through a specially designed safety-level waste heat removal system. trap. Otherwise, heat accumulation and temperature rise in the reactor may lead to damage or even melting of fuel elements, thus causing serious nuclear safety accidents due to radioactive release. This is one of the most important safety concerns in nuclear reactor design. [0003] Different from light water reactors, high-temperature gas-cooled reactors use high-temperature-resistant ceramic-coated granular fuel elements, graphite with large...

AI Technical Summary

Problems solved by technology

For example, the AP1000 advanced pressurized water reactor designed in the United States is designed as a passive waste heat removal system, which only relies on gravity to start and does not require the action of active components such as water pumps. However, it also requires a series of valve actions and relies on external signals to start, so there are still failures possibility of

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