Grillwork for pressurized water reactor fuel assembly

A technology for fuel assemblies and pressurized water reactors, which is applied to reactor fuel elements, reactors, and greenhouse gas reduction, etc., can solve the problems of inability to limit internal strips, poor structural rigidity, poor strength, and thicker plate thickness, so as to avoid cracks. and deformation, increased stiffness, high processing efficiency

Inactive Publication Date: 2020-04-10
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Among them, in order to solve the problems of many defects in the existing grid manufacturing process, complex process, and poor manufacturing efficiency; and to solve the defects of the existing grid strip design structure rigidity and poor strength, to solve the existing grid outer strips whe

Method used

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  • Grillwork for pressurized water reactor fuel assembly
  • Grillwork for pressurized water reactor fuel assembly
  • Grillwork for pressurized water reactor fuel assembly

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] The grid frame in the prior art is composed of inner strips and outer strips, and the inner strips are interlaced and surrounded by the outer strips. Both the inner strip and the outer strip are formed by pressure processing of metal plates, and the inner strips, the inner strip and the outer strip are connected by welding; the disadvantages are:

[0035] Both the inner strip and the outer strip are processed by pressure from metal plates; the pressure processing is prone to cracks and springback, so there are many defects, the process is complicated, and the processing efficiency is low; in addition, the protrusions on the inner strip and the outer strip Because it is formed by pressure processing, it will cause local plate thinning, which affects the local stiffness and strength of the strip.

[0036] In view of the above problems, the present invention provides a grid for PWR fuel assemblies.

[0037] Specific as figure 1 with figure 2 As shown, a grid for PWR fu...

Embodiment 2

[0045] The embodiment of the present invention is further limited on the basis of embodiment 1.

[0046] In the prior art grid, the guide fins of the outer strips are also bent inwards to reduce the risk of the adjacent components being caught during loading and unloading, but the guide fins bent inwards in the vertical direction Rigidity will be reduced, and it is easy to deform in the vertical direction when the assembly is loaded and unloaded.

[0047] Such as Figure 4 with Figure 5 As shown, in order to increase the stiffness of the guide fins 13 in the vertical direction and reduce the risk of the adjacent components being caught during loading and unloading, a reinforcement structure is provided on the inner surface of the guide fins 13, and the reinforcement structure passes through the outer strip The limit slots provided on the belt 1 are used for position limit, and the reinforcing structure is vertically distributed with the guide fins 13 .

[0048] Furthermore...

Embodiment 3

[0052] The difference between the embodiment of the present invention and embodiment 2 only lies in:

[0053] The reinforcing structure is a reinforcing plate 14 , and an opening groove 15 is opened on the reinforcing plate 14 .

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PUM

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Abstract

The invention particularly relates to a grillwork for a pressurized water reactor fuel assembly, and belongs to the field of pressurized water reactor fuel assemblies. The grillwork comprises outer strips and inner strips, and a plurality of inner strips are arranged inside a plurality of outer strips in a wrapping manner and are mutually staggered, wherein a plurality of bosses which are distributed in two rows at equal intervals are arranged on the surface of the inner side of the outer strips and the thickness of the plate on the outer strips at the joint of the bosses and the outer stripsis set to be thickened so that the thickness of the plate on the outer strips at the joint of the bosses and the outer strips is set to be thickened, the strength and the rigidity of the outer stripsat the bosses are improved in a basic mode of adding materials, cracks and deformation caused by excessive load can be effectively avoided and the reliability is higher; the process is simple and themachining efficiency is high.

Description

technical field [0001] The invention relates to the field of pressurized water reactor fuel assemblies, in particular to a grid for pressurized water reactor fuel assemblies. Background technique [0002] The grid frame in the prior art is composed of inner strips and outer strips, and the inner strips are interlaced and surrounded by the outer strips. Both the inner strip and the outer strip are formed by pressure processing of metal plates, and the inner strips, the inner strip and the outer strip are connected by welding; the disadvantages are: [0003] Both the inner strip and the outer strip are processed by pressure from metal plates; the pressure processing is prone to cracks and springback, so there are many defects, the process is complicated, and the processing efficiency is low; in addition, the protrusions on the inner strip and the outer strip Because it is formed by pressure processing, it will cause local plate thinning, which affects the local stiffness and ...

Claims

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Application Information

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IPC IPC(8): G21C3/352
CPCG21C3/352Y02E30/30
Inventor 王君陈晓明谢哲东王跃勇武海巍杨丹赵丽萍焦海坤周丽娜
Owner JILIN AGRICULTURAL UNIV
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