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Efficient laser decontamination system and method for radioactive metal surface

A metal surface and decontamination system technology, applied in the direction of radioactive purification, cleaning methods and appliances, chemical instruments and methods, etc., to achieve the effects of avoiding escape, improving radiation resistance, and avoiding deposition

Active Publication Date: 2021-03-23
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inability of conventional laser decontamination devices to achieve deep stripping and removal of substrates with complex structures, this technology has not been widely used in the field of radioactive metal surface decontamination.

Method used

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  • Efficient laser decontamination system and method for radioactive metal surface
  • Efficient laser decontamination system and method for radioactive metal surface
  • Efficient laser decontamination system and method for radioactive metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment provides a laser decontamination system for radioactive metal surfaces, including a laser head 7 and a motion mechanism 4. The motion mechanism 4 is a three-dimensional motion mechanism. Specifically, industrial robots, mechanical arms, multi-axis machine tools and other high-precision three-dimensional movement structure. The laser head 7 is installed on the operation end of the motion mechanism 4, and the motion mechanism 4 drives the laser head 7 to move in the operation area.

[0053] The outer wall of laser head 7 is also covered with shell cover, and the chamber between shell cover inner wall and laser head 7 outer walls is as cooling circuit 13; Cooling circuit 13 is also provided with air inlet 14, and the cooling air outlet in cooling circuit 13 Located at the output port of the output shaft. Also includes a negative pressure treatment device 8; after the cooling gas enters the cooling circuit 13 from the air inlet 14, it is discharged from the...

Embodiment 2

[0056] Further improvement on the basis of Embodiment 1, the laser head 7 is designed as a paraxial structure, specifically the laser head includes an input shaft and an output shaft, the output shaft is located next to the input shaft, and the axes of the output shaft and the input shaft are parallel; The input shaft and the output shaft are connected by the transmission shaft, and the axis of the transmission shaft is perpendicular to the axes of the input shaft and the output shaft; one axial end of the input shaft is used as the input port of the laser input laser head 7, and the other axial end of the input shaft is connected to the laser head 7. One end of the transmission shaft is connected, the other end of the transmission shaft is connected with one end of the output shaft, and the other end of the output shaft is used as the output port of the laser output laser head 7 . A deflection lens 16 is provided inside the connecting part of the input shaft and the transmissi...

Embodiment 3

[0059] This embodiment provides a method for highly efficient laser decontamination of radioactive metal surfaces, using a laser decontamination system for radioactive metal surfaces provided in Embodiment 2; including the following steps: using the laser head 7 to perform point-by-point decontamination on the surface of the decontamination object 9 For scanning and decontamination, the optimal design adopts three laser heads 7 to operate simultaneously; the three laser heads 7 are arranged to operate in a character shape, and the circular light spots formed by the three laser heads 7 on the surface of the decontamination object 9 are circumscribed in pairs, each A circular light spot forms a decontamination cone 18 on the surface of the decontamination object 9 .

[0060] The process of laser decontamination using a laser decontamination system for radioactive metal surfaces provided in Embodiment 2 is as follows: The laser beam generated by the laser 1 is transmitted to the l...

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Abstract

The invention discloses an efficient laser decontamination system and method for a radioactive metal surface. The efficient laser decontamination system comprises a laser head and a movement mechanism. The laser head is installed at the operation end of the movement mechanism, and the movement mechanism drives the laser head to do three-dimensional movement in an operation area. The outer wall ofthe laser head is further wrapped with a shell cover, a cooling loop is arranged in the shell cover, or a cavity between the inner wall of the shell cover and the outer wall of the laser head serves as the cooling loop. The cooling loop is further provided with a gas inlet, and a cooling gas outlet in the cooling loop is located on an output port of an output shaft. After entering the cooling loopfrom the gas inlet, cooling gas is discharged from the cooling gas outlet and sprayed to the surface of a decontamination object, and a gas pressure flow field is formed by the cooling gas and a negative pressure treatment device; and the cooling gas flow carries removed secondary waste to enter the negative pressure treatment device. By means of the efficient laser decontamination system and method, loose contamination, oxide layer and metal base material shallow surface layer stripping of the radioactive metal surface can be achieved at the same time, and the radiation resistance of the laser decontamination head is high.

Description

technical field [0001] The invention relates to the technical field of nuclear facility decommissioning and radioactive waste treatment, in particular to a high-efficiency laser decontamination system and method for radioactive metal surfaces. Background technique [0002] Nuclear facility waste disposal is one of the keys to the sustainable and stable development of the nuclear industry, and has always been highly valued. A large number of radioactive metal items are produced during the operation and decommissioning of nuclear facilities, most of which are surface contamination. However, due to the long-term interaction between radioactive nuclides and metal materials, they will not only adhere to the metal surface to form loose contamination on the surface, but also react with the metal to form an oxide layer, and even enter the shallow surface of the metal. Therefore, in order to achieve a more thorough decontamination effect, it is necessary not only to remove loose con...

Claims

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Application Information

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IPC IPC(8): B08B7/00B08B13/00G21F9/00
CPCB08B7/0042B08B13/00G21F9/005G21F9/001Y02E30/30
Inventor 赵菀章航洲曹俊杰张永领颜锟梧王小兵王国华孙志军陈鑫刘茂全干信陈旭敏
Owner NUCLEAR POWER INSTITUTE OF CHINA
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