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A liquid heavy metal cooling reactor fuel assembly

A liquid heavy metal and fuel assembly technology, applied in the field of nuclear engineering, can solve the problems of high processing difficulty and high accident risk, and achieve the effect of inherent safety and risk reduction

Inactive Publication Date: 2015-11-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of complex and fine structure, difficult processing and high accident risk in existing foreign designs, and provide a liquid heavy metal cooling reactor fuel assembly, which has the advantages of simple design, inherent safety, and simple refueling device, etc. Universally applicable to reactors using liquid heavy metals as coolants

Method used

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  • A liquid heavy metal cooling reactor fuel assembly
  • A liquid heavy metal cooling reactor fuel assembly
  • A liquid heavy metal cooling reactor fuel assembly

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Embodiment Construction

[0019] Attached below Figure 1-3 A kind of liquid lead-based alloy cooling fast neutron reactor fuel assembly proposed by the present invention is further introduced:

[0020] Such as figure 1 , 2 , 3, after the upper tube base 6 and the combustion outer sleeve 5 are welded together, the upper end plugs of the bundled fuel elements 3 are inserted into the apertures of the upper tube base 6 to fix. The bundled fuel elements 3 are fixed with metal winding wires 4, and then the lower end plugs of the bundled fuel elements 3 are inserted into the small holes of the lower tube base 7 to fix them. After installation, the lower tube base 7 and the combustion outer sleeve 5 are also welded together. Adjust the position of the hexagon of the coolant inlet 8 so that it coincides with the hexagon of the combustion outer sleeve 5 before welding. Insert the central bearing rod 11 into the center of the combustion system 1, which is part of the counterweight system 2, with an external ...

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Abstract

The invention provides a liquid heavy metal cooling reactor fuel assembly, and belongs to the field of nuclear engineering. The assembly comprises a fuel system and a counterweight system which is used for fixing the fuel assembly, wherein the fuel system comprises a fascicular fuel element, a metal winding wire, an upper tube socket and a lower tube socket which are used for fixing the fuel element, an outer tube sleeve and coolant inlets; and the counterweight system comprises a counterweight filler, a counterweight outer tube sleeve, a center bearing rod, a flange and the like. According to the invention, the fuel assembly can be fixed in the liquid lead base alloy coolant by utilizing own gravity, has inherent safety and can be used for reducing risks of a fuel operating accident and a rod ejection accident in utmost accidents. The fuel assembly provided by the invention is suitable for reactors of which the coolant is a liquid heavy metal with high density.

Description

technical field [0001] The invention relates to a liquid heavy metal cooling reactor fuel assembly, which is suitable for a reactor in which a liquid heavy metal alloy with relatively high density is selected as a coolant, and belongs to the field of nuclear engineering. Background technique [0002] While using nuclear energy in today's world, it has to face the problem of handling and disposing of nuclear waste. Accelerator-driven subcritical systems are an ideal nuclear waste transmutation device. Liquid heavy metal lead-based alloys are currently the main candidate materials for accelerator-driven subcritical reactor coolants due to their good neutronic properties, safety characteristics, and heat transfer capabilities. However, because the density of liquid heavy metals is higher than that of fuel assemblies, unlike water-cooled reactors, fuel assemblies with traditional structures cannot be fixed in the core by their own gravity in reactors in which liquid heavy metals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/12
CPCY02E30/40Y02E30/30
Inventor 韩骞黄群英吴庆生彭蕾陈建伟
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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