A device for continuously destroying radioactive waste organic solvents

Abstract

The invention belongs to the technical field of the spent fuel reprocessing and discloses a device for continuously destructing a radiative waste organic solvent. The device comprises a constant-temperature tank and an electrochemical oxidation destruction container located in the constant-temperature tank; the container is mainly composed of an anode chamber, a cathode chamber and a clarifying chamber; the radiative waste organic solvent goes into the clarifying chamber by use of a waste organic solvent feeding pipe; when the solvent is higher than a separator between the clarifying chamber and the anode chamber, the solvent goes into the anode chamber. The non-destructed waste organic solvent is mixed with water into a mixed solution which goes into the clarifying chamber by use of a liquid flow channel between the anode chamber and the clarifying chamber, the separation of the organic phase and the water phase is realized in the clarifying chamber, and the water phase located below contains redionuclides and is charged by use of a water phase drainage pipe at a certain rate; besides, the organic phase located at top is mixed with the waste organic solvent added by use of the waste organic solvent feeding pipe and then the mixture flows into the anode chamber by use of the upper channel of the separator. The device is capable of meeting the requirements on improving the current effectively and realizing continuous destruction of waste organic solvents.

Description

technical field [0001] The invention belongs to the technical field of spent fuel reprocessing, and in particular relates to a device for continuously destroying radioactive waste organic solvents. Background technique [0002] The biggest feature of the spent fuel reprocessing process is that the processed fuel has strong α, β, and γ radioactivity. In the process of extraction, separation and purification, the organic solvent (such as 30% TBP / kerosene) will be subject to strong radiation and chemical action of different reagents, causing it to undergo radiolysis and generate radiolysis products, which will cause changes in the performance of the extraction agent and result in the recovery of uranium and plutonium. loss. Considering economical factors and waste minimization, the used organic solvents are usually recycled after acid-base washing until their extraction performance deteriorates to the point that they can no longer meet the process requirements, and then they a...

AI Technical Summary

Problems solved by technology

However, there are also the following disadvantages: the electrochemical destruction process is oxidative decomposition and destruction under the sufficient mixing of radioactive waste organic solvents and nitric acid aqueous solution containing oxidizing media, so it is difficult to achieve single-phase discharge in the anode chamber, and then continuous destruction cannot be achieved

At present, all laboratories adopt batch processing method, which takes a long time to completely decompose and destroy, has small processing capacity, and low current efficiency, which cannot meet the needs of large-scale industrial processing.

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