A grid spring and positioning grid with improved anti-abrasion performance and reduced resistance

A positioning grid and performance technology, applied in the direction of nuclear power generation, greenhouse gas reduction, climate sustainability, etc., to achieve the effect of improving abrasive performance, increasing contact area, and reducing resistance

Active Publication Date: 2022-02-22
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems existing in the existing spring structure, the present invention provides a lattice spring with improved anti-abrasion performance and reduced resistance

Method used

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  • A grid spring and positioning grid with improved anti-abrasion performance and reduced resistance
  • A grid spring and positioning grid with improved anti-abrasion performance and reduced resistance
  • A grid spring and positioning grid with improved anti-abrasion performance and reduced resistance

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Embodiment

[0035] In the positioning grid cell, such as figure 1 As shown, the clamping structure is formed by the spring 1 and the opposite rigid protrusion 2, which jointly exert positive pressure on the fuel rods. The cell structure is used to achieve radial positioning of the fuel rods, and at the same time, the static friction is used to achieve axial restraint on the fuel rods.

[0036] Such as figure 2 The AFA3G spacer grid spring shown is a separate spring bar, which is compressed to generate elastic force on the fuel rods by using the three-bend arch structure. The spring structure greatly hinders the coolant flow channel and increases the overall resistance of the grid.

[0037] In order to solve the problem that the existing spring structure increases the overall resistance of the grid, this embodiment proposes the following image 3 The shown lattice spring structure uses the superposition of the elastic member 3 and the rigid member 4 to improve the anti-abrasion performa...

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PUM

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Abstract

The invention discloses a grid spring and a positioning grid which improve the anti-abrasion performance and reduce the resistance. The grid spring of the invention includes an elastic piece and a rigid piece arranged on the elastic piece. The rigid member is in contact with a fuel rod and the rigid member is in surface contact with the fuel rod. The spring of the present invention adopts the overlapping design of the elastic part and the rigid part, and the rigid part is in surface contact with the fuel rod, which increases the contact area and enhances the anti-abrasion performance.

Description

technical field [0001] The invention belongs to the technical field of fuel assemblies, and in particular relates to a grid spring and a positioning grid which improve the anti-abrasion performance and reduce the resistance. Background technique [0002] The fuel assembly commonly used in the existing pressurized water reactor nuclear power plant is composed of a number of fuel rods, guide pipes, positioning grids, upper and lower nozzle sockets and the like. As an important part of the frame, the positioning grid has the basic function of clamping the fuel rods and positioning them, and this function is realized by the springs and rigid protrusions on the strips. [0003] The traditional positioning grid is equipped with springs and rigid protrusions on its strips. The springs are pressed to generate positive pressure on the fuel rods, and the fuel rods are supported by the rigid protrusions on the opposite side of the springs, so that the fuel rods can be aligned in one di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/34G21C3/356G21C3/30
CPCG21C3/34G21C3/356G21C3/30Y02E30/30
Inventor 陈杰陈平彭园雷涛郑美银肖忠李权黄永忠蒲曾坪任全耀韩元吉吕亮亮
Owner NUCLEAR POWER INSTITUTE OF CHINA
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