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...

Examples

Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] figure 1 A schematic diagram of the fuel assembly is given. The fuel assembly includes a multilayer structure arranged in sequence along the thickness direction, each layer structure includes several grid units arranged along the height direction, and each grid unit is composed of uranium-zirconium alloy fuel 1, water coolant 3 and cooling pipe 2 , the cooling tube 2 is used for bearing pressure and passes through the uranium-zirconium alloy fuel horizontally. The extension direction of the cooling tube is perpendicular to the thickness direction of the fuel assembly, and is arranged in an equilateral triangle in the fuel assembly, that is, three cooling tubes adjacent to each other in the fuel assembly The cross sections of the tubes 21, 22, 23 are equilateral triangles. Each fuel grid contains cylindrical cooling water 3, cylindrical zircon...

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...

Examples

Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] figure 1 A schematic diagram of the fuel assembly is given. The fuel assembly includes a multilayer structure arranged in sequence along the thickness direction, each layer structure includes several grid units arranged along the height direction, and each grid unit is composed of uranium-zirconium alloy fuel 1, water coolant 3 and cooling pipe 2 , the cooling tube 2 is used for bearing pressure and passes through the uranium-zirconium alloy fuel horizontally. The extension direction of the cooling tube is perpendicular to the thickness direction of the fuel assembly, and is arranged in an equilateral triangle in the fuel assembly, that is, three cooling tubes adjacent to each other in the fuel assembly The cross sections of the tubes 21, 22, 23 are equilateral triangles. Each fuel grid contains cylindrical cooling water 3, cylindrical zircon...

Images