Decontamination electrolyte and decontamination method

An electrolyte and electrochemical technology, applied in the field of radioactive pollutant treatment, can solve the problems of poor decontamination efficiency

Inactive Publication Date: 2019-09-20
LINGDONG NUCLEAR POWER +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing electrochemical decontamination e

Method used

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  • Decontamination electrolyte and decontamination method

Examples

Experimental program
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specific Embodiment

[0035] The following will be described in detail in conjunction with specific embodiments. The following examples do not include other components except unavoidable impurities unless otherwise specified. The drugs and instruments used in the examples are all routine choices in the art unless otherwise specified. The experimental methods for which specific conditions are not indicated in the examples are implemented according to conventional conditions, such as the conditions described in the prior art or the method recommended by the manufacturer.

Embodiment

[0037] (1) The decontamination electrolyte of each embodiment was prepared with water as a solvent, wherein the components of the decontamination electrolyte of each embodiment and the content of each component in the decontamination electrolyte are shown in Table 1.

[0038] (2) In the laboratory, non-radioactive isotopes are deposited on the surface of the metal test piece (the test piece is Z5CND13.04 martensitic stainless steel) to obtain radioactively contaminated test pieces. The composition and content of the sediment were measured by energy spectrum.

[0039] (3) Put the test piece with simulated pollutants in the decontamination device, and use stainless steel or titanium plate as the cathode for electrochemical decontamination. Among them, the current density is 1400A / m 2 , the temperature of the decontamination solution is room temperature, and the electrochemical decontamination time is 10 minutes.

[0040] The test piece processed by the above process parameters...

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Abstract

The invention relates to a decontamination electrolyte and a decontamination method. The decontamination electrolyte comprises nitric acid, nitrate and oxalate. The final volume percentage of the nitric acid ranges from 5% to 15%, the final concentration of the nitrate ranges from 15g/L to 25g/L, and the final concentration of the oxalate ranges from 1g/L to 5g/L. The decontamination electrolyte can efficiently remove radioactive contaminants on the surface of a metal workpiece through the reasonable proportions of the nitric acid, the nitrate and the oxalate and the synergistic effect of the components.

Description

technical field [0001] The invention relates to the field of radioactive pollutant treatment, in particular to a decontamination electrolyte and a decontamination method. Background technique [0002] In nuclear systems such as nuclear power plants and nuclear power research institutes, along with the operation of nuclear facilities and equipment, the radioactive substances produced will cause surface contamination of metal parts. In order to ensure the health and safety of operators, the surrounding public and the environment, it is necessary to control this pollution within safety standards and decontaminate components contaminated by radioactive substances. [0003] At present, the electrochemical decontamination method is the main decontamination method in the field of nuclear environmental protection. The electrochemical decontamination method refers to a method that dissolves the pollutants on the metal surface by electrolysis to make the metal surface smooth, so as t...

Claims

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Application Information

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IPC IPC(8): C25F1/06
CPCC25F1/06
Inventor 赵滢张惠炜何小平秦体照洪振旻王浩宇姜磊张宇宏何继强彭珍琳
Owner LINGDONG NUCLEAR POWER
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