Beryllium-based liquid cladding layer based on silicon carbide tube

Abstract

The invention discloses a beryllium-based liquid cladding layer based on a silicon carbide tube; a U-shaped first wall processed by low-activation steel is welded with an upper/lower cover plate, a reinforcing plate and a cooling water inlet header to form a plurality of cavities, and the cavities are supported by a back plate. A high-temperature and high-pressure water cooling agent is introducedinto a parallel first wall cooling water flow channel in the U-shaped first wall, so that the first wall of the cladding layer is cooled. A neutron multiplying agent for beryllium titanium alloy processing is arranged in the cavities, the silicon carbide lithium lead flow channel penetrates through a reinforcing plate and the neutron multiplying agent, lithium lead rapidly flows in the silicon carbide flow channel, and cladding layer tritium production and multiplication area heat removal are achieved. The cladding layer tritium propagation rate can be greater than 1.2 through reasonable proportioning of the liquid lithium lead and the beryllium titanium neutron multiplying agent; a silicon carbide tube which is resistant to high temperature and corrosion and good in electrical insulationis adopted as the lithium lead flow channel, the problems of the MHD effect and corrosion in the cladding layer can be effectively avoided, and the cladding layer outlet temperature and the fusion reactor thermoelectric conversion efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of fusion reactor engineering, and mainly relates to a beryllium-based liquid cladding based on a silicon carbide tube. Background technique [0002] The development of safe and efficient fusion energy has been included in the medium and long-term development plan of my country's nuclear energy field. At present, my country is conducting the design and research of the China Fusion Engineering Test Reactor (CFETR). Demonstrating fusion energy power generation and tritium self-sustainability, and achieving cladding tritium breeding rate TBR ≥ 1.1 are the main design goals proposed by CFETR. [0003] The tritium breeding envelope is the core component of the fusion reactor, and its main function is to achieve tritium self-sustainability, discharge nuclear heat and plasma heat flow, and provide radiation shielding. In response to these functional requirements, scholars at home and abroad have proposed a variet...

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Problems solved by technology

[0006] In order to overcome the shortcomings of insufficient tritium multiplication capacity in the rear area of ​​the liquid cladding, easy corrosion of the steel lithium-lead flow channel, and immature mitigation measures for the MHD effect, in view of the fact that the fission reactor silicon carbide fuel cladding tube technology has become increasingly mature

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