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Electrochemistry in-situ dirt removing method of radioactive contaminant on surface of metal

A metal surface, electrochemical technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of inconvenient maintenance and use, high cost and complexity of decontamination, and achieve convenient use and maintenance, high decontamination accuracy, and decontamination effect. Good results

Active Publication Date: 2019-02-01
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electrochemical in-situ decontamination method for radioactive pollutants on metal surfaces, so as to solve the complex decontamination process for difficult and non-detachable metal workpieces in the prior art, and the decontamination cost caused by untargeted radionuclides High, and the complex structure of the electrochemical decontamination device is not easy to maintain and use

Method used

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  • Electrochemistry in-situ dirt removing method of radioactive contaminant on surface of metal
  • Electrochemistry in-situ dirt removing method of radioactive contaminant on surface of metal
  • Electrochemistry in-situ dirt removing method of radioactive contaminant on surface of metal

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Embodiment 1

[0056] Such as Figure 1 to Figure 3 The illustrated embodiment is an electrochemical in-situ decontamination method for radioactive contaminants on a metal surface. The method uses an electrochemical decontamination system. The electrochemical decontamination system includes a DC stabilized power supply, an anode metal clip and a portable electrochemical cathode device, The portable electrochemical cathode device includes a liquid storage tank 1, a cathode plate 2 is installed below the liquid storage tank 1, a wire 12 is connected to the cathode plate 2, a through hole 3 is provided at the bottom of the liquid storage tank 1, and the bottom end of the through hole 3 is sequentially Through the liquid storage tank 1 and the cathode plate 2; the outside of the liquid storage tank 1 is detachably connected with an anode contactor 4, and the anode contactor 4 is provided with a receiving cavity for receiving the cathode plate 2, and the receiving cavity is also A filling pad 6 lo...

Embodiment 2

[0066] On the basis of embodiment 1, the portable electrochemical cathode device further includes a top cover 7 located above the liquid storage tank 1. The top cover 7 is provided with an adjustment through hole, and the adjustment through hole communicates the internal space and the external space of the top cover 7, The top cover 7 is provided with an adjusting bolt 8 and an adjusting screw hole matching the adjusting bolt 8, the adjusting screw hole communicates with the adjusting through hole; the bottom of the adjusting bolt 8 is provided with a gasket; the outside of the liquid storage tank 1 A housing 9 located above the anode contactor 4 is sleeved, a handle 10 is connected to the housing 9, and a wire routing groove 11 is provided in the handle 10.

[0067] Through the top cover 7 and the adjusting through hole, the adjusting bolt 8, and the adjusting screw hole, the user can adjust the penetration rate of the electrolyte according to the actual demand during operation, ...

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Abstract

The invention discloses an electrochemistry in-situ dirt removing method of radioactive contaminant on the surface of metal. A liquid storage tank is involved in the method. A cathode plate is installed below the liquid storage tank. A guide wire is connected to the cathode plate. A through hole is formed in the bottom of the liquid storage tank. The bottom of the through hole penetrates through the liquid storage tank and the cathode plate sequentially. An anode contactor is detachably connected to the exterior of the liquid storage tank. The anode contactor is provided with a storing cavityused for storing the cathode plate. The anode contactor is provided with a ring-shaped sealing part. The interior of the ring-shaped sealing part and the bottom face of the anode contactor form a washing cavity. An opening is formed in the bottom of the anode contactor. The opening communicates with the storing cavity and the washing cavity. According to the method, for the small contaminant area,fixed-point in-situ dirt removing can be carried out on the radionuclide area by means of the washing cavity formed by the anode contactor and the ring-shaped sealing part, the dirt removing precision is high, the dirt removing effect is good, the electrolyte solution is prevented from being wasted on the surface of the metal which does not need to be washed, the washing cost is saved, and the amount of second-time waste liquid is small.

Description

Technical field [0001] The invention relates to the field of nuclear facility decommissioning and three wastes treatment, in particular to an electrochemical in-situ decontamination method for radioactive pollutants on metal surfaces. Background technique [0002] In nuclear power plants, military nuclear power and research institutes, along with the operation, maintenance, inspection and regular overhaul of nuclear facilities and equipment, spent fuel reprocessing and decommissioning of nuclear facilities will produce a large number of removable and difficult-to-remove metal contaminated parts. Such as pipes, glove boxes, etc. The main radionuclides deposited and attached to the surface are 60 Co, 55 Fe, 63 Ni and 54 Mn. For the decontamination of these metal contaminated components and other nuclear facilities, physical or chemical methods and means are mainly used to remove all or part of the contaminated radionuclides from their surface or inside, so as to prevent and reduce...

Claims

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Application Information

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IPC IPC(8): C25F1/04C25F7/00
CPCC25F1/04C25F7/00
Inventor 鲁芸芸陈云明李兵曹骐张劲松陈旭敏严文超周蓉赵萍
Owner NUCLEAR POWER INSTITUTE OF CHINA
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