An advanced fusion-fission subcritical energy reactor core fuel assembly

Abstract

The invention belongs to the design technique of nuclear power and particularly relates to an advanced fusion-fission subcritical energy source reactor core fuel assembly. The fuel assembly comprises multiple layers of structures sequentially arranged along the thickness direction, wherein each layer of structure comprises a plurality of grid units, the grid units are arranged along the height direction and are provided with uranium-zirconium alloy fuels, a cooling tube horizontally penetrates through the uranium-zirconium alloy fuels of each grid unit, the extending direction of the cooling tube is vertical to the thickness direction of the fuel assembly, and flowable cooling agents are filled in the cooling tubes. According to the advanced fusion-fission subcritical energy source reactor core fuel assembly, the natural uranium and zirconium alloys are taken as fission fuels, the cooling tubes are arranged in the fuels in a regular triangle manner, and the cooling of the fuels can be guaranteed due to the arrangement manner of the cooling tubes. The fuel assembly has the advantages that the uranium-water volume ratio is proper, and a reactor core can have an enough energy amplification factor.

Description

technical field [0001] The invention belongs to nuclear power design technology, in particular to the design of an advanced fusion-fission subcritical energy reactor core fuel assembly. Background technique [0002] As a special reactor type transitioning to a controlled nuclear fusion power plant, the fusion-fission hybrid reactor has special advantages in terms of safety, economy, energy optimization utilization and environmental impact. The fusion-fission subcritical energy reactor with production capacity as the main purpose It is a kind of fusion-fission hybrid reactor, which uses the fusion reactor as a neutron source to generate high-flux neutrons, and coats the fusion device with a layer of fissile material or convertible material (such as 238 U 232 Th), energy and neutrons are multiplied by fusion neutron-induced fission, (n,2n) and capture reactions to generate electricity and fissile materials. The energy multiplier of the fission cladding, which is mainly based...

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Problems solved by technology

[0003] Fusion neutron source-driven subcritical energy core fuel assemblies previously designed at home and abroad mostly consider the fuel rod-shaped layout, which does not solve the problem of coolant pressure, and the structure of the fuel assembly needs to be improved

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