Safe blocking method for excavation disturbed area of roadway of high-level radioactive waste disposal repository

Abstract

The invention discloses a safe blocking method for an excavation disturbed area of a roadway of a high-level radioactive waste disposal repository and relates to the technical field of high-level radioactive waste disposal. According to the safe blocking method, multiple sets of sealing sections are excavated in the roadway wall of the original high-level radioactive waste disposal repository andfilled with buffer material blocks, under the effect of underground water, the buffer material blocks expand, and thus the sealing sections are sealed. According to the safe blocking method for the excavation disturbed area of the roadway of the high-level radioactive waste disposal repository, when nuclides leak, flow into the roadway and flow through the excavation disturbed area, leakage of thenuclides from rock stratum gaps is effectively blocked through the sealing sections, so that the safety of the high-level radioactive waste disposal repository is guaranteed, and potential safety hazards of nuclide leakage is eliminated.

Description

technical field [0001] The invention relates to the technical field of high-level radioactive waste disposal, in particular to a method for safety isolation of a disturbed area during roadway excavation of a high-level radioactive waste disposal storehouse. Background technique [0002] In recent years, with the vigorous development of the national economy, energy shortage has gradually become a serious problem facing China. China has paid more and more attention to the use and development of nuclear energy. The use of nuclear energy will inevitably produce a large amount of nuclear waste. Therefore, the disposal of nuclear waste has become an urgent problem to be solved. [0003] For the disposal of high-level radioactive waste, the feasible solution generally accepted by the international community is to bury the high-level radioactive waste in a stable formation at a depth of 500-1000m underground: that is, after the high-level radioactive waste is solidified and filled, ...

AI Technical Summary

Problems solved by technology

[0006] It is precisely because of the existence of this excavation disturbance area that the "multi-barrier system" originally composed of surrounding rock geological barriers, artificial barriers based on bentonite as buffer materials, and waste storage container barriers has certain safety hazards

When the repository is buried in the ground for a very long time, the high-level waste storage container may rupture, resulting in the release of nuclides

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