Supercritical carbon dioxide reactor fuel assembly

A carbon dioxide and fuel assembly technology, which is applied in the control of reactor fuel elements, reactors, and nuclear reactions, etc., to achieve significant effects and good application prospects.

Active Publication Date: 2019-01-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the fuel assembly in the prior art cannot achieve the effect of having a stronger moderation ability and being able to be used in a high temperature environment under the premise of reducing the volume. The purpose of the present invention is to provide A supercritical carbon dioxide reactor fuel assembly, which can be used in a high-temperature environment while reducing its volume and improving its moderation capacity through a reasonable structural design

Method used

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  • Supercritical carbon dioxide reactor fuel assembly
  • Supercritical carbon dioxide reactor fuel assembly
  • Supercritical carbon dioxide reactor fuel assembly

Examples

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Embodiment 1

[0031] A supercritical carbon dioxide reactor fuel assembly mainly includes an upper nozzle 1, a fuel core and a lower nozzle 7 arranged sequentially from top to bottom, such as figure 1 shown.

[0032] The fuel core includes a moderator area 4, a thermal insulation and burnable poison area 5, and a fuel area 6 arranged sequentially from the inside to the outside, such as figure 2 shown.

[0033] Moderator cooling holes 7 vertically penetrating the moderator zone 4 are also provided in the moderator zone 4, and fuel coolant holes 8 vertically penetrating the fuel zone 6 are set in the fuel zone 6; Supercritical carbon dioxide first flows through the moderator cooling hole 7 from top to bottom, and then flows through the fuel coolant hole 8 from bottom to top and then is discharged, as image 3 shown.

Embodiment 2

[0035] A supercritical carbon dioxide reactor fuel assembly, mainly comprising a hexagonal prism fuel core body 1, and an upper socket 2 arranged at the upper end of the fuel core body 1 and a lower socket 3 arranged at the lower end of the fuel core body 1, such as figure 1 shown.

[0036] In the present invention, the fuel core 1 is composed of three coaxial hexagonal prisms with different side lengths, the innermost circle is the moderator, the outermost circle is the fuel, and the middle circle layer is heat insulation and combustible poison; that is, the fuel core 1 From the center to the outside, there are moderator area 4, heat insulation and burnable poison area 5, and fuel area 6, such as figure 2 shown.

[0037] The moderator zone 4 is a hexagonal prism with a diameter of 20-22mm, and a moderator cooling hole 7 with a diameter of 3-4mm is opened inside to cool the moderator and control the operating temperature of the moderator zone. Heat insulation and burnable p...

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Abstract

The invention discloses a supercritical carbon dioxide reactor fuel assembly, and solves the problem that a fuel assembly in the prior art cannot have stronger moderating power and be used in a high-temperature environment under the premise of reducing the volume. The supercritical carbon dioxide reactor fuel assembly comprises an upper pipe saddle, a fuel core and a lower pipe saddle sequentiallyarranged from top to bottom, wherein the fuel core comprises a moderator zone, a heat insulation and burnable poison zone and a fuel zone coaxially arranged from inside to outside; the moderator zoneis of a hexagonal prism structure; the heat insulation and burnable poison zone is of a hexagonal annular structure which sleeves the outer wall of the moderator zone; the fuel zone is of a hexagonalannular structure which sleeves the outer wall of the heat insulation and burnable poison zone; a moderator cooling hole is formed in the moderator zone; a fuel coolant hole is formed in the fuel zone; and supercritical carbon dioxide flows across the moderator cooling hole from top to bottom first, flows across the fuel coolant hole from bottom to top, and then is discharged. The supercritical carbon dioxide reactor fuel assembly has the advantages of small volume of a reactor core, strong moderating power, unrestricted operating environment, and the like.

Description

technical field [0001] The invention relates to the field of reactor fuel assemblies, in particular to a supercritical carbon dioxide reactor fuel assembly. Background technique [0002] The supercritical carbon dioxide reactor generally has a higher outlet temperature, and has higher requirements on the high temperature resistance of the fuel material. Fuels currently used in supercritical CO2 reactors are generally spherical or hexagonal prism-shaped fuels based on a graphite matrix. [0003] Among them, the hexagonal columnar fuel is generally inserted into the hexagonal columnar graphite matrix with through holes, and has the advantages of regular structure, easy core layout, and rich experience in the use of the stack. Due to the weak neutron moderation ability of the gas itself, the traditional thermal neutron supercritical carbon dioxide reactor needs to use graphite as moderator. However, the moderation ability of graphite itself is still weak, so a large volume of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/328G21C5/12G21C7/04G21C11/08
CPCG21C3/328G21C5/12G21C7/04G21C11/081Y02E30/30
Inventor 王俊峰黄彦平
Owner NUCLEAR POWER INSTITUTE OF CHINA
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