Tunnel-scale evaluation of rock mass suitability for the disposal of high-level radioactive waste
Rock mass suitability evaluation is a core part of the siting and design of a disposal repository for high-level radioactive waste,aiming to determine whether the rock masses at the site meet the functional requirements for long-term containment and radionu-clides isolation.Based on the previously proposed site-scale evaluation method(QHLW)of rock mass suitability,this study further de-veloped criteria for the tunnel-scale evaluation of rock mass suitability and established a two-phase evaluation system consisting of pre-evaluation and final evaluation.Additionally,in combination with geological and hydrological data revealed by demonstration tunnel 1(DT1)at the site of the ONKALO underground research laboratory in Finland,this study tested and verified the criteria of the two-phase evaluation system on the disposal tunnel scale.The comparison between the suitability evaluation results obtained using the opti-mized QHLW and the qualitative evaluation results determined using the rock suitability classification(RSC)rock mass grading method indicates that both methods yielded roughly consistent results.This confirms the feasibility of the tunnel-scale evaluation method of rock mass suitability.
geological disposal of high-level radioactive wasteevaluation of rock mass suitabilitytunnel-scale
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维普
