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Bottom combined anti-collision structure for high-temperature gas cooled reactor control rod

A high-temperature gas-cooled reactor and control rod technology, which is applied in the reduction of greenhouse gases, control of nuclear reactions, and reactors, etc., can solve the problems of reactivity control performance impact, buffer performance impact, reverse jumping, etc., to protect the structural integrity. , Guarantee the effectiveness and prolong the service life

Pending Publication Date: 2020-12-11
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned two kinds of schemes all have certain shortcomings, for the scheme of setting elastic element, the phenomenon that control rod can appear reverse jumping after collision, thus have influence on reactivity control performance; In the scheme, the lower part of the active zone of the high temperature gas-cooled reactor has the highest temperature, and the crushing device is in the highest temperature zone in the reactor for a long time, there is a risk of structural failure, which will affect the buffer performance during the collision

Method used

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  • Bottom combined anti-collision structure for high-temperature gas cooled reactor control rod
  • Bottom combined anti-collision structure for high-temperature gas cooled reactor control rod
  • Bottom combined anti-collision structure for high-temperature gas cooled reactor control rod

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Embodiment 1

[0035] like Figure 1-3 As shown, the bottom combined anti-collision structure for the control rods of the high temperature gas-cooled reactor in this embodiment is composed of the rod body 1, the tightening ring 2, the spring 3, the thin-wall crushing cylinder 4 and the buffer joint 5. A communication hole 11 is provided on the outer wall of the rod body 1 to connect the outer chamber of the thin-walled crushing cylinder 4 with the external environment. In addition, a guide groove 12 is provided on the rod body, and a groove 51 is provided at the upper end of the buffer joint 5, which is used to limit the displacement of the thin-walled crushing cylinder 4 to avoid off-axis buckling during the compression process, so as to be compatible with the rod body. 1 contact or even stuck. The spring 3 is limited by the bosses on the rod body 1 and the buffer joint 4 respectively, so as to avoid its mutual contact with the rod body 1 and the thin-walled crushing cylinder 4 during the ...

Embodiment 2

[0044] Such as Figure 4-6 As shown, the bottom combined anti-collision structure for high temperature gas-cooled reactor control rods is composed of rod body 1, tightening ring 2, spring 3, thin-walled crushing tube 4, buffer joint 5 and inner cladding 6. A communication hole 11 is provided on the outer wall of the rod body 1 to connect the outer chamber of the thin-walled crushing cylinder 4 with the external environment. In addition, a guide groove 12 is provided on the rod body, and a groove 51 is provided at the upper end of the buffer joint 5, which is used to limit the displacement of the thin-walled crushing cylinder 4 to avoid off-axis buckling during the compression process, so as to be compatible with the rod body. 1 contact or even stuck. The spring 3 is limited by the inner casing 6 to prevent it from contacting the rod body 1 and the thin-wall crushing cylinder 4 during the working process. The inner cladding 6 extends downward along the center of the rod body ...

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Abstract

The invention relates to a bottom combined anti-collision structure for a high-temperature gas cooled reactor control rod. The structure comprises a buffer section arranged at the lower end of a control rod body, wherein a spring and a thin-wall crushing cylinder arranged between the rod body and the buffer section. According to the invention, kinetic energy generated by falling of the control rodin a rod falling accident is absorbed through compression of the spring and buckling of the thin-wall crushing cylinder, so that the purpose of optimizing rigid collision between the control rod andthe lower reflecting layer in traditional design is achieved, and damage to the control rod and a graphite layer is avoided; according to the arrangement relation between the cavity where the impact load absorption element is located and the coolant flow channel, the control rod can be divided into an open cavity type structure and a closed cavity type structure which are both of a hollow structure, and the control rod can be compatible with a solid control rod and a hollow control rod according to the design requirement of the control rod; and the two buffer elements are arranged in a combined manner, so that the loss of reactivity control value of the control rod to the reactor in the axial direction due to the design of a buffer structure is avoided to the maximum extent, and the bufferelements are easier to replace.

Description

technical field [0001] The invention relates to the design of a control rod of a high-temperature gas-cooled reactor, in particular to a bottom-combined anti-collision structure for the control rod of a high-temperature gas-cooled reactor. Background technique [0002] Energy is one of the important industries in the national economy, and the development of the national economy cannot be separated from the support of energy. At present, my country's economy is in a period of rapid development, and the demand for energy is increasing day by day. Therefore, sufficient energy must be provided for economic development. Due to the resource limitation of traditional fossil energy and the increasingly prominent environmental problems, the development of clean and safe alternative energy is imminent. Nuclear energy is a clean energy that can replace fossil fuels on a large scale. [0003] High-temperature gas-cooled reactor (HTGR) is a type of nuclear reactor. It is an advanced re...

Claims

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Application Information

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IPC IPC(8): G21C7/20G21C7/10
CPCG21C7/20G21C7/10Y02E30/30
Inventor 董浩江小川杨伟申腾刘臣伟贺楷朱思阳
Owner CHINA NUCLEAR POWER ENG CO LTD
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