Method for preparing radioactive nuclear waste glass solidified body through microwave method

Abstract

The invention discloses a method for preparing a radioactive nuclear waste glass solidified body through a microwave method. The method is characterized by comprising the following steps: 1) injectingactivated carbon and radioactive waste liquid into a stirrer, and sufficiently stirring until the activity of the radioactive waste liquid meets the specification of GB8978-1996; 2) discharging the waste liquid from the bottom of the stirrer, and drying the filtered activated carbon at 85-95 DEG C for 2-3 hours; 3) crushing activated carbon, and uniformly mixing the crushed activated carbon withthe glass raw material, wherein the mass of the activated carbon accounts for 3-15% of the total mass of the mixture; 4) injecting the mixture into a smelting furnace, in vacuum or inert atmosphere, and performing microwave heating to generate a melt; and 5) transferring to a corresponding container, annealing, and cooling to complete glass curing of the nuclear waste. The method has the advantages that active carbon is used for purifying radioactive waste liquid, the absorption effect is good and the cost is low; the adsorbed activated carbon and a glass raw material are mixed and melted so that the problem that a glass body is difficult to melt by microwaves is solved, the energy consumption is reduced, and the melting time is shortened; and the solidification effect on radionuclide is enhanced.

Description

technical field [0001] The invention belongs to the field of hazardous radioactive waste treatment, and relates to a method for preparing radioactive nuclear waste vitrified body by microwave method. Background technique [0002] Nuclear energy is a clean and efficient energy technology that is expected to replace fossil energy and become the main energy source for human beings. As of October 2019, my country has built 18 nuclear power plants, 47 units are in operation, and 13 units are under construction. China has become the fastest growing country in the nuclear energy industry. Since nuclear power plants generate a large amount of waste liquid containing low-concentration radioactive waste during the operation of nuclear power plants, nuclear power plants are mostly distributed in coastal and river areas to discharge waste liquid into water bodies. In addition, under the destruction of natural or human factors such as earthquakes and terrorist attacks, nuclear power pla...

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Problems solved by technology

[0003] The traditional radioactive waste treatment method is to use ion exchange resin to purify the waste liquid, then send the waste ion exchange resin to the curing plant, and use an electric furnace for heating and curing. The traditional heat conduction heating method also has defects such as low thermal efficiency, long melting cycle, and thermal gradient.