A method and device for drying radioactive waste ion exchange resin in a microwave barrel

Abstract

The invention relates to a method for drying radioactive waste ion exchange resin using microwaves in a barrel. The method comprises the steps that (1) the radioactive waste ion exchange resin is drained; (2) the drained radioactive waste ion exchange resin is conveyed to the stainless steel barrel; (3) the radioactive waste ion exchange resin contained in the stainless steel barrel is subjected to drying treatment by utilizing the microwaves, and in addition, the temperature is monitored; (4) after the stainless steel barrel reaches the preset filling rate, the drying stops, and the sealed storage treatment is carried out. The invention also provides a drying device for realizing the method. The method and the drying device have the advantages that a microwave pressurized water evaporation technology is adopted, the drying process can be enabled to be fast and stably carried out, the heating uniformity and the invariance of the resin are ensured, and in addition, the shifting out of radioactive nuclides along with moisture boiling can be reduced to the greatest degree; the drying device can realize the continuous feeding and the automatic control, the drying process is carried out in the stainless steel barrel in a drying cabin, and the possibility of injury on personnel and pollution on equipment and environment caused by the radioactive nuclides can be reduced.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste treatment, and in particular relates to a drying method and a drying device in a microwave barrel of radioactive waste ion exchange resin. Background technique [0002] With the development of social economy, the demand for power resources is increasing, and nuclear power, as an efficient and clean energy source, has been paid more and more attention by people. However, while bringing huge economic benefits to people, the problem of disposal of waste ion exchange resins generated during the operation of nuclear power plants is becoming more and more serious. It has a certain specific activity of radioactivity. If it is not handled properly, it will easily cause serious harm to the public and the environment when it suffers from natural disasters such as earthquakes, tsunamis, or terrorist attacks, and may even cause social unrest. Therefore, effective treatment of radioactive waste ion ...

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Problems solved by technology

[0005] The heat sources of conventional in-barrel drying technology include steam, electric heating, heat transfer oil, etc., and heat transfers from the outside of the barrel to the inside of the barrel. Due to the temperature gradient between the barrel wall and the center of the barrel, the waste ion exchange resin on the barrel wall heats up quickly and dries quickly, which is prone to The spent ion exchange resin denatures and blocks heat conduction

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