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Reactor control rod driving wire buffer structure

A buffer structure and control rod technology, which is applied in the control of nuclear reactions, reactors, and reduction of greenhouse gases, etc., can solve the problems that the buffer form is no longer applicable, and the control rod components cannot be popularized, etc., and achieve good buffering effect and convenient rod drop buffering requirements , the effect of simple structure

Active Publication Date: 2016-11-09
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure is simple, but it is only applicable to the control rod assembly of rod bundle type, and cannot be extended to control rod assemblies of other structural forms
[0005] Due to the overall design and physical requirements of the core, the control rod assembly may be designed in different forms, such as H-shaped, Y-shaped, cross-shaped, etc. The traditional buffer form is no longer applicable

Method used

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  • Reactor control rod driving wire buffer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the buffer structure of the reactor control rod drive line includes a buffer, a connecting rod 1, and a return spring 3, wherein:

[0027] There is a water cavity 5 inside the buffer, and a number of water holes 6 are opened on the wall of the water cavity 5;

[0028] The connecting rod 1 is arranged in the water cavity 5, and the upper and lower ends of the connecting rod 1 pass through the buffer respectively, the upper end is used for connecting the driving rod, and the lower end is used for connecting the control rod assembly;

[0029] The buffer includes a buffer upper part 2 and a buffer lower part 4, the buffer upper part 2 is fixedly connected with the connecting rod 1, the buffer lower part 4 can slide relative to the connecting rod 1, that is, the buffer lower part 4 can slide in the vertical direction, and the rod can be dropped In the later stage, the lower part of the buffer 4 contacts the support and remains still, and the upper...

Embodiment 2

[0036] On the basis of Embodiment 1, in this embodiment, the buffer is improved as follows:

[0037] The buffer upper part 2 is provided with a first cavity 21, the buffer lower part 4 is provided with a second cavity 41, the first cavity 21 and the second cavity 41 communicate to form a water cavity 5, and the first The cross sections of the cavity 21 and the second cavity 41 are circular.

[0038] The upper end of the buffer lower part 4 extends into the first cavity 21, and there is an annular gap between the cavity wall on the side of the first cavity 21 and the connecting rod 1, and the cavity on the side of the second cavity 41 There is also an annular gap between the wall and the connecting rod 1. The water flow holes 6 are opened on the upper part 2 of the buffer and run through the cavity wall on the side of the second cavity 41. These water flow holes 6 are in the cavity of the first cavity 21. The walls are evenly distributed in the circumferential direction, and m...

Embodiment 3

[0044] On the basis of Embodiment 1, in this embodiment, the buffer is improved as follows:

[0045] A first cavity 21 is provided in the upper part 2 of the buffer, and a second cavity 41 is provided in the lower part 4 of the buffer. The first cavity 21 and the second cavity 41 communicate to form a water chamber 5. The buffer The lower end of the upper part 2 of the device extends into the second cavity 41, and the water flow holes 6 are opened on the lower part 4 of the buffer, and these water flow holes 6 can be arranged in multiple rows from top to bottom.

[0046] There is a gap between the lower end of the buffer upper part 2 and the bottom of the second cavity 41, that is, the bottom of the second cavity 41 does not contact the lower end of the buffer upper part 2, so as to prevent the buffer upper part 2 from filling the entire second cavity. Cavity 41, because the second cavity 11 needs to be filled with water for buffering.

[0047] The upper end of the buffer upp...

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Abstract

The invention relates to a reactor control rod driving wire buffer structure. The reactor control rod driving wire buffer structure comprises a buffer, a connecting rod and a reset spring, wherein a water cavity is formed inside the buffer, a plurality of drain holes are formed in the cavity wall of the water cavity; the connecting rod is arranged in the water cavity, and the upper end and the lower end of the connecting rod respectively penetrate through the buffer; the buffer comprises a buffer upper part and a buffer lower part, the buffer upper part is fixedly connected with the connecting rod, the buffer lower part can slide relative to the connecting rod, the buffer lower part contacts a bearing and is static in a rod dropping late period, and the buffer upper part continues to move downward, so that buffering is realized by extruding water in the water cavity; and the reset spring is arranged in the water cavity, elastic force direction of the reset spring is parallel to the connecting rod, and the reset spring is used for enabling the buffer lower part to reset after a buffering process is finished. The reactor control rod driving wire buffer structure is not limited by types of control rod assemblies, can be applicable to different types of control rod driving wires and is a universal driving wire buffer structure; and the reactor control rod driving wire buffer structure has the advantages of good universality, simple structure, lower manufacturing difficulty and low cost.

Description

technical field [0001] The invention belongs to internal components of a pressurized water reactor, in particular to a buffer structure for a control rod driving line of a pressurized water reactor. Background technique [0002] When the reactor control rods are dropped from a high position, they have a large potential energy. If no effective buffer measures are applied, a large impact force will be generated when the rods collide with the supporting surface at the end of the fall, and the impact force will generally exceed the bearing capacity of the structure. The integrity and reliability of the reactor are greatly affected, which in turn affects the safety of the reactor. [0003] Therefore, in the structural design of the reactor control rod drive line, it is usually necessary to design the corresponding structure to play a buffer role in the process of control rod drop, so as to limit the impact force during the drop of the rod within a reasonable range. [0004] At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C7/20
CPCG21C7/20Y02E30/30
Inventor 王留兵刘晓饶琦琦杜华段春辉何大明张宏亮肖聪陈训刚颜达鹏杨灵均
Owner NUCLEAR POWER INSTITUTE OF CHINA
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