Method for purifying and disposing low-medium radioactive degradable PVA product

A low-radioactive and radioactive technology, applied in the field of low-radioactive degradable PVA products, can solve the problems of temporary storage pressure of radioactive waste and increase the final disposal cost of power plant operation cost, and achieve the effect of eliminating harm, reducing waste and reducing storage.

Inactive Publication Date: 2017-06-20
魏家奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the background of the country vigorously developing nuclear power plants, the amount of radioactive solid waste generated will also double. If strict control and volume reduction measures are not taken, it will inevitably cause pressure on the temporary storage of radioactive waste, increase final disposal costs and power plant operating costs, etc.

Method used

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  • Method for purifying and disposing low-medium radioactive degradable PVA product

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Effect test

Embodiment 1

[0027] Such as figure 1 Shown, a method for decontaminating PVA products with low and medium radioactivity for purification and disposal, comprising the following steps:

[0028] (1) Dissolution: Put the medium and low radioactive degradable PVA products into the dissolution tank, and dissolve the PVA products in water by heating and\or stirring and\or self-circulation; the dissolution step is to dissolve the medium and low radioactive degradable The PVA product is completely immersed in the aqueous solution, and dissolved in the way of continuous heating and stirring; the PVA product is completely dissolved into a homogeneous liquid, and the temperature is 70°C;

[0029] (2) Degradation: use chemical methods to degrade the PVA solution; the degradation step uses catalysis, oxidation, or the method of catalytic oxidation synergistic reaction, specifically Fenton or photocatalysis; the reaction temperature is 150 ° C; the PVA solution is degraded It is a substance containing a...

Embodiment 2

[0035] Such as figure 1 Shown, a method for decontaminating PVA products with low and medium radioactivity for purification and disposal, comprising the following steps:

[0036] (1) Dissolution: Put the medium and low radioactive degradable PVA products into the dissolving tank, and dissolve the PVA products in water by heating or self-circulation; the dissolution step is to completely soak the medium and low radioactive degradable PVA products in the aqueous solution , Dissolving in the way of continuous heating and self-circulation; completely dissolve the PVA product into a uniform liquid at a temperature of 120 ° C;

[0037] (2) Degradation: use chemical methods to degrade the PVA solution; the degradation step adopts catalysis, oxidation, or the method of catalytic oxidation synergistic reaction, specifically using electric Fenton or photocatalysis; the reaction temperature is 70 ° C; The PVA solution is degraded into substances containing a large number of small molecu...

Embodiment 3

[0043] like figure 1 Shown, a method for decontaminating PVA products with low and medium radioactivity for purification and disposal, comprising the following steps:

[0044] (1) Dissolution: Put the medium and low radioactive degradable PVA products into the dissolving tank, and dissolve the PVA products in water by heating and self-circulation; the dissolution step is to completely soak the medium and low radioactive degradable PVA products in the aqueous solution , dissolve in the way of continuous heating and stirring; completely dissolve the PVA product into a homogeneous liquid at a temperature of 90°C;

[0045] (2) Degradation: use chemical methods to degrade the PVA solution; the degradation step uses catalysis, oxidation, or the method of catalytic oxidation synergistic reaction, specifically using electro-Fenton and titanium oxide catalysis; the reaction temperature is 150 ° C; Degrade the PVA solution into substances containing a large number of small molecular st...

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Abstract

The invention discloses a method for purifying and disposing low-medium radioactive degradable PVA products. The method comprises steps of dissolution, degradation, filtering, nuclide detection, COD advanced treatment, COD detection. In order to reduce problems of storing and stacking nuclear power industry protective equipment, and overcome defects of existing related treatment technology, the invention provides a method for realizing harmless, volume-reducing and weight reducing treatment of low-medium radioactive degradable PVA products in a nuclear power industry through dissolution, degradation, and advanced treatment and other ways. The method can reduce waste amount generated during building and operation periods of the nuclear power industry, and reduces and even puts an end to damages radioactive elements may cause to environment and society.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for purifying and disposing of medium and low radioactive degradable PVA products. Background technique [0002] While nuclear energy and nuclear technology have brought enormous economic and social benefits to mankind, they have also greatly endangered human health and environmental safety. The treatment and disposal of radioactive solid waste generated during the operation of nuclear power plants is an important issue that must be solved in the development of nuclear power plants. Under the background of the country vigorously developing nuclear power plants, the amount of radioactive solid waste generated will also increase exponentially. If strict control and volume reduction measures are not adopted, it will inevitably cause pressure on the temporary storage of radioactive waste, increase final disposal costs and power plant operating costs. It is ...

Claims

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Application Information

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IPC IPC(8): G21F9/00G21F9/30
CPCG21F9/00G21F9/30
Inventor 魏家奎张召文
Owner 魏家奎
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