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Three-arc spring for grid positioning and utilization method of three-arc spring

A three-bend spring and grid technology, applied in the field of nuclear reactor core fuel assemblies, can solve the problems of grid spring stiffness, wear, and fuel rod damage

Active Publication Date: 2016-12-21
上海核工程研究设计院股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a larger grid clamping force is required, the grid spring stiffness will be larger, which will cause difficulty in processing the grid spring; Rod damage, wear phenomenon

Method used

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  • Three-arc spring for grid positioning and utilization method of three-arc spring

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Embodiment Construction

[0027] figure 1 A preferred embodiment of the triple-bend spring of the present invention is shown. Such as figure 1 As shown, the three-curved spring 1 for grid positioning is composed of three wavy arches, which resemble the number "3". In order for the three-curved spring to work stably, the three arches are roughly divided into two types of heights and two types of radians, wherein the height and radians and height and width of the first arch 2 on both sides are equal, while the height of the second arch 3 in the middle is greater than The height of the first arch 2 on both sides, the radian of the second arch 3 in the middle is also greater than the radian of the first arch 2 on both sides.

[0028] Preferably, the height ratio of the first arch 2 on both sides to the second arch 3 in the middle is about 1:2, the radians of the first arch 2 on both sides are equal, greater than 30° and less than 120°, and the second arch 3 in the middle The arc is greater than 60° and ...

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Abstract

The invention relates to nuclear reactor core fuel components and discloses a three-arc spring for grid positioning and a utilization method of the three-arc spring. The three-arc spring which is composed of three waved arcs is used for grid positioning and longitudinally arranged in a grid, the length direction of the three-arc spring is parallel to that of a to-be-positioned object, and the three arcs are in two heights. Contact surfaces of the arcs of the three-arc spring and the to-be-positioned object are arc, one side of each of the first arcs 2 on two sides is connected with the grid, and the other side of each of the first arcs 2 are connected with the second arc 3 in the middle. When the three-arc spring is used, the three-arc spring for grid positioning is arranged in the grid longitudinally, outer sides of the first arcs 2 on two sides of the three-arc spring formed by the three arcs are enabled to connect with the grid, and the arcs having arc contact surfaces with the to-be-positioned object are enabled to contact with the to-be-positioned object.

Description

technical field [0001] The invention relates to a nuclear reactor core fuel assembly, in particular to a three-curved spring used for grid positioning at the end of the fuel assembly and its application method. Background technique [0002] The fuel assembly is a critical component of the nuclear reactor core that generates heat and transfers this heat energy to the coolant. A fuel assembly is formed by a certain number of fuel rods arranged in a certain way in the fuel assembly skeleton. There are several positioning grids arranged at intervals along the axial direction on each fuel assembly skeleton. The positioning grid is a square grid structure composed of metal strips welded to each other. It uses the rigid support in each grid and six contacts composed of springs to clamp the fuel rods and position the fuel rods. Among them, the uppermost and lower positioning grids are called end positioning grids, and the end positioning grids are usually made of stainless steel, ...

Claims

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Application Information

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IPC IPC(8): G21C3/356
CPCG21C3/356G21C3/3563G21C3/3566Y02E30/30
Inventor 党宇刘松孙靖雅朱丽兵丁捷卢俊强周云清
Owner 上海核工程研究设计院股份有限公司
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