Radioactive decontamination wet tissue and preparation method thereof

Abstract

The invention provides a radioactive decontamination wet tissue and a preparation method thereof.The radioactive decontamination wet tissue comprises a wet tissue body and decontamination liquid infiltrated in the wet tissue body, and the wet tissue body is made of dust-free cloth; the decontamination solution is prepared from the following raw materials: ultrapure water, fatty alcohol-polyoxyethylene ether, isopropanol, 2-carboxyl phosphonoacetic acid and pentasodium diethylenetriamine pentaacetate. The preparation raw materials adopt ultrapure water and isopropanol as solvents, and do not contain halogen, sulfur, water-soluble high-molecular compounds and the like, so that the influence on metal materials in nuclear industry equipment or pipelines can be avoided, and the increase of radioactive liquid waste caused by the water-soluble high-molecular compounds can be avoided. The 2-carboxyl phosphonoacetic acid and the diethylenetriamine sodium pentaacetate are compounded to have relatively strong complexing property on actinide nuclides and transition metals, and particularly have relatively strong complexing and dispersing performance on radioactive cation nuclides, and the introduced isopropanol and fatty alcohol-polyoxyethylene ether can effectively reduce the surface tension of the decontamination solution and improve the decontamination efficiency; therefore, the residual quantity after decontamination is very low.

Description

technical field [0001] The invention relates to the technical field of nuclear facility three waste treatment and radioactive decontamination, in particular to a wet wipe used for nuclear facility radioactive decontamination and a preparation method thereof. Background technique [0002] At present, the surface contamination of domestic nuclear facilities generally adopts the method of wiping and decontamination. The specific operation is to prepare a bucket of decontamination liquid first, then soak it with a decontamination cloth, and use the decontamination cloth soaked in the decontamination liquid to wipe the decontamination object. The wiped decontamination cloth is treated as radioactive wet waste, and its treatment method is difficult and expensive. In this way, a large amount of decontamination liquid and decontamination cloth are wasted, and the production of radioactive waste is increased, thereby increasing the operating cost. [0003] At present, wet wipes have...

AI Technical Summary

Problems solved by technology

Chitosan is a water-soluble polymer compound in wet wipes. After use, it is not easy to treat the waste liquid by pressure filtration, and the cost of wet oxidation treatment is high.

At the same time, sulfide corrodes metal materials to produce FeS, FeS and O and H 2 O reaction produces polythionic acid, which is easy to cause metal intergranular corrosion and stress cracking

Affected by the aforementioned factors, wet wipes on the market have too high residue after wiping the surface of equipment or pipelines, which limits their application in the nuclear industry

So far, no functional wet wipes have been used in the nuclear industry to decontaminate radioactive contamination

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