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Radionuclide decontaminant, and preparation method and application thereof

A radionuclide, detergent technology, applied in chemical instruments and methods, surface active detergent compositions, detergent compounding agents, etc., can solve the problems of uncertainty, waste of materials, complexity, etc.

Pending Publication Date: 2021-08-31
YANGJIANG NUCLEAR POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dirt composition on the surface of the sling and seat belt is not only complex and uncertain, but also the dirt may be layered after a long period of impact with air dust and air drying, which greatly increases the difficulty of decontamination.
In addition, the diversity of fiber materials (polyester, polyester, nylon) for lifting belts and safety belts (common type, fireproof type, fluorescent type, light inspection type, protective type, high-strength type, combination type), cleaning time process The limitations of the existing customary decontamination process and the characteristics of the existing customary decontamination process have brought greater challenges to the development and application of decontamination agents.
[0006] At present, there is no successful case of decontamination of flexible slings and safety belts in nuclear power plants in China. The contaminated flexible slings and safety belts can only be scrapped, which wastes materials, increases the production of radioactive waste, and leads to the operation and maintenance costs of nuclear power plants. rise

Method used

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  • Radionuclide decontaminant, and preparation method and application thereof
  • Radionuclide decontaminant, and preparation method and application thereof
  • Radionuclide decontaminant, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0053] In Examples 1-6, three detergents with different components were respectively prepared by using the preparation method provided by the present invention.

[0054] See Table 1 and Table 2 for the raw material composition of detergent in each embodiment of 1kg.

[0055] Concrete preparation method is as follows:

[0056] Prepare each component according to weight percentage: chelating agent, nuclide removing agent, surfactant, complex enzyme, pH regulator and water;

[0057] Then add water first in the container with stirrer; Add described chelating agent, nuclide removing agent, tensio-active agent and complex enzyme successively to described container under agitation;

[0058] Utilize a stirrer to stir the solution in the container, the stirring speed is 800r / min, and the stirring time is 40min;

[0059] Add an appropriate amount of the pH regulator into the container to adjust the pH value of the solution to 9.0, continue to stir for 15 minutes, mix well, test, and p...

Embodiment 1

[0078] The decontamination effect of the decontamination agents in Examples 1-6 on radioactive contamination can reach more than 83.6%, far exceeding the cleaning effect of clear water. Among them, the decontamination effect of the decontamination agents in Embodiment 1, Embodiment 2 and Embodiment 3 on the radioactive contamination on the surface of the sling is as high as 97%, and has a very strong effect of removing radionuclides.

[0079] figure 1 For the photo of the sling before decontamination, figure 2 It is a photo of the sling after the decontamination treatment with the detergent in Example 3. It can be clearly found that the oil stain on the surface of the sling is smoother after the decontamination treatment. image 3 It is the SEM photo of the sling after the decontamination treatment by the detergent in Example 3, which further proves that the decontamination agent in Example 3 has an excellent decontamination effect on the sling without destroying the sling ...

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Abstract

The invention discloses a radionuclide decontaminant, and a preparation method and application thereof. The decontaminant comprises, by mass, 8-12% of a surfactant, 2-5% of compound enzyme, 16-20% of a nuclide removing agent, 8-14% of a chelating agent and water. The preparation method comprises the following steps: preparing the required components according to the weight percentage; adding water into the container; sequentially adding the chelating agent, the nuclide removing agent, the surfactant and the compound enzyme into the container under stirring; and adding a proper amount of the pH regulator into the container, and fully and uniformly mixing to obtain the decontaminant. The application means that the decontaminant is used for removing radionuclides on the surface of a lifting belt or a safety belt for a nuclear power plant. The decontaminant has an excellent cleaning effect on dust and greasy dirt on the surfaces of the lifting belt and the safety belt, especially has an excellent removal effect on radionuclide contamination, and meanwhile, the detergent does not contain corrosive components, is environment-friendly and does not cause damage to fiber materials.

Description

technical field [0001] The invention relates to nuclear power plant waste treatment technology, in particular to the technical field of radioactive pollution decontamination, and more specifically, to a radionuclide decontamination agent and its preparation method and application. Background technique [0002] In Europe and the United States, the production and use of synthetic fiber flexible lifting belts began 30 years ago, and now they account for nearly 70% of the total lifting consumption. Almost all factories will use them. Chinese enterprises began to use them a few years ago, and their market share has continued to increase. Synthetic fiber slings are widely used in various industries such as: metallurgy, oil pipelines, wind power hoisting, power transmission and transformation, nuclear power, shipbuilding, precision machinery, aerospace, port hoisting, chemical industry and other fields. [0003] The flexible sling is light in weight, only 20% of the weight of the s...

Claims

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Application Information

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IPC IPC(8): C11D1/83C11D3/386C11D3/33
CPCC11D1/8305C11D3/38618C11D3/38627C11D3/38645C11D3/33C11D1/721C11D1/722C11D1/662C11D1/06C11D1/143
Inventor 姚志猛邹晓炜刘资平朱剑锐李新贤詹鹏举牛凯
Owner YANGJIANG NUCLEAR POWER
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