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Analog control rod assembly of nuclear power station

A technology for analog control and nuclear power plants, applied in nuclear power generation, nuclear engineering, nuclear reactor monitoring, etc., can solve problems such as inaccurate results of friction tests

Active Publication Date: 2012-10-03
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this also makes the friction contact between the simulated control rod and the control rod guide cylinder a surface contact, which is different from the line contact between the real control rod assembly and the control rod guide cylinder, resulting in inaccurate friction test results

Method used

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  • Analog control rod assembly of nuclear power station
  • Analog control rod assembly of nuclear power station
  • Analog control rod assembly of nuclear power station

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Embodiment Construction

[0019] see image 3 with Figure 4 , The simulated control rod assembly of the nuclear power plant of the present invention includes a spider 20 , a simulated control rod 22 and a weight suspension rod 24 .

[0020] The spider 20 is provided with simulated control rod fixing holes 200. However, the centers of these fixing holes 200 are not aligned with the theoretical centers of the corresponding guide holes 34 of the control rod guide cylinder, but are offset by 0.1~0.5mm, and different The offset direction of the fixed hole 200 relative to the theoretical center of the corresponding guide hole 34 is different, and the specific offset direction is as follows: Figure 4 indicated by the arrows in each. The optimum offset of the center of each fixing hole 200 is 0.1mm.

[0021] The outer diameter of the simulated control rod is 0.1~0.5mm smaller than the existing technology, that is, it is 0.2~1.0mm smaller than the diameter of the guide hole of the control rod guide cylinde...

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Abstract

The invention discloses an analog control rod assembly of a nuclear power station. The analog control rod assembly comprises a star frame, analog control rods and a weight steeve; analog control rod mounting holes are formed in the star frame; the centers of these mounting holes deviate from 0.1-0.5 mm relative to the theoretical centers of the corresponding guide holes of control rod guide cylinders; and the offset directions of at least two mounting holes relative to the theoretical centers of the corresponding guide holes are different. Compared with prior art, the analog control rod assembly of the nuclear power station, provided by the invention, has the advantages that through the mode of control rod malposition, the friction contact form in a friction test is the same as that of the true condition; the frictional force of the control rod guide cylinders, obtained by the test, can be ensured to be closer to the true value under the effect of lateral flow; and the test result can be extrapolated to all design conditions.

Description

technical field [0001] The invention relates to a special inspection tool for a control rod guide cylinder in a nuclear power plant, and more specifically, the invention relates to a simulated control rod assembly of a nuclear power plant. Background technique [0002] The drop time of control rods is an important control parameter in the process of reactor design, which directly affects the safe operation of nuclear power plants. In order to ensure the safe and reliable operation of the control rods and not be affected by the external flow field, a control rod guide cylinder assembly is introduced in the reactor design, which can provide guidance and support for the control rod assembly and ensure the smooth movement of the control rods inside the guide cylinder. pass. see figure 1 with figure 2 The guide portion of the control rod guide cylinder includes a series of guide grids 30 and a continuous guide section 32, and a star-shaped perforation 33 is opened inside the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/10
CPCY02E30/30
Inventor 唐茂陈亮肖威
Owner 中广核工程有限公司
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