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Electrochemical decontamination electrolyte

An electrolyte and electrochemical technology, applied in the field of electrochemical decontamination electrolyte, can solve the problems of incapable of taking into account the decontamination effect, the problem of decontamination waste liquid treatment, the unsuitability of electrolyte, etc., to achieve good decontamination effect, Taking into account the problem of decontamination waste liquid treatment and the effect of fast decontamination

Active Publication Date: 2015-03-04
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem that the electrolyte in the existing electrochemical decontamination of radioactively contaminated stainless steel is not applicable, and the decontamination effect and decontamination waste liquid treatment cannot be well taken into account, the present invention provides an electrochemical decontamination electrolyte

Method used

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  • Electrochemical decontamination electrolyte

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Embodiment 1

[0027] The electrochemical decontamination electrolyte of the present invention is used for electrochemical decontamination of radioactively contaminated stainless steel, and the ratio of the electrolyte used is: 0.5 mol / L nitric acid + 5 g / L oxalic acid + 1 g / L citric acid.

[0028] The specific operation is: add an appropriate amount of the above electrolyte into the electrolytic cell, immerse the stainless steel sheet to be decontaminated into the electrolyte, and use 8V direct current for constant potential electrolysis for 120s. The weight loss of the stainless steel sheet is 6.4mg / cm. 2 . Use deionized water to rinse the decontaminated stainless steel sheet, and the measured surface radioactivity level of the stainless steel sheet meets the reuse requirements.

Embodiment 2

[0030] The electrochemical decontamination electrolyte of the present invention is used for electrochemical decontamination of radioactively contaminated stainless steel, and the used electrolyte ratio is: 0.5 mol / L nitric acid + 5 g / L oxalic acid + 10 g / L citric acid.

[0031] The operation method is the same as in Example 1. The weight loss of the stainless steel sheet is 8.0mg / cm. 2 , The measured radioactivity level on the surface of the stainless steel sheet meets the reuse requirements.

Embodiment 3

[0033] The electrochemical decontamination electrolyte of the present invention is used for electrochemical decontamination of radioactively contaminated stainless steel, and the ratio of the electrolyte used is: 0.25 mol / L nitric acid + 9 g / L oxalic acid + 5 g / L citric acid.

[0034] The operation method is the same as in Example 1, and the weight loss of the stainless steel sheet is measured to be 5.7mg / cm 2 , The measured radioactivity level on the surface of the stainless steel sheet meets the reuse requirements.

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Abstract

The invention relates to a decontamination solution for processing solid radioactive pollution materials, and aims at solving the problems in the existing electrochemical decontamination electrolyte of radioactive polluted stainless steel is not applicable, and cannot relatively well give consideration of the decontamination effect and treatment of decontamination liquid waste. The invention provides an electrochemical decontamination electrolyte. The electrochemical decontamination electrolyte comprises the following components: 0.25-0.5mol / L of nitric acid, 5-10g / L of oxalic acid and 1-10g / L of citric acid. The electrochemical decontamination electrolyte disclosed by the invention has a good decontamination effect on radioactive pollution stainless steel, and is high in decontamination speed; various components are compatible to a radioactive liquid waste treatment system; the decontamination liquid waste is low in quantity and easy to process; the electrolyte can be recycled, and is small in environmental pollution; and the decontamination effect and the treatment of the decontamination liquid waste are well taken into account.

Description

Technical field [0001] The invention relates to a decontamination solution for treating solid radioactive contaminated materials, in particular to an electrochemical decontamination electrolyte. Background technique [0002] In the nuclear industry, nuclear facilities are contaminated with radioactive materials during operation, making them radioactive. Based on actual needs, when operations such as maintenance or decommissioning of nuclear facilities are required, in order to ensure the health and safety of operators and the public, and reduce the potential release of radioactive materials, it is necessary to decontaminate nuclear facilities contaminated by radioactive materials. . [0003] For solid radioactive contaminated materials, physical, chemical and electrochemical methods are mainly used at home and abroad for decontamination. [0004] The physical methods include dust collection, wiping, high-pressure jet and ultrasonic methods. The advantages are as follows: the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F1/00
Inventor 吴继宗王祥丽刁垒白雪
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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