Experiment device for research of actinide elementdiffusionin high-level radioactive waste repository

Abstract

The invention belongs to field of research of high-level radioactive wastegeological disposal, and particularly relates to an experiment device for the research of actinide elementdiffusion ina high-level radioactive waste repository. The experiment device comprises a diffusion chamber (1) and a locking mechanism (2); the interior of the diffusion chamber (1) is filled with a porous material (3); the diffusion chamber (1) is fixed on the outer surface of a stock solution bottle (4) and is communicated with the interior of the stock solution bottle (4); a connector (5) used for being connected with thediffusion chamber (1) is arranged on the stock solution bottle (4); the diffusion chamber (1) is provide with a bottom cover (6); the bottom cover (6) is locked to the connector (5) through the locking mechanism (2). The experiment device can be operated for a long time, and is suitable for migration experiments of uranium, neptunium and plutonium.

Description

technical field [0001] The invention belongs to the research field of geological disposal of high-level radioactive waste, and in particular relates to an experimental device used for the research on the diffusion of actinide elements in a high-level radioactive waste disposal storehouse. Background technique [0002] Establishing a geological repository for high-level radioactive waste is currently the best way to dispose of spent fuel from nuclear power plants. It adopts the design idea of ​​"multiple barrier system", which is mainly divided into "engineering barrier" and "natural barrier". Countries choose different lithology as natural barriers according to different geological conditions, usually choose granite, clay rock and tuff as natural barriers; choose bentonite as engineering barriers. In order to ensure the long-term safety of these isolation barrier buffer materials, it is necessary to carry out scientific experiments on these systems to simulate the retardati...

AI Technical Summary

Problems solved by technology

However, this solution is difficult to take out compacted porous geological material samples

In addition, when carrying out the diffusion experiment of actinide elements, there are also the following characteristics: danger (with strong radioactivity), long-term (0.5--3 years), high temperature (80--100 ° C), large changes in solution acidity, etc.

Conventional experimental devices cannot meet the experimental requirements well

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