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http://dx.doi.org/10.7474/TUS.2022.32.2.107

A Review of In-Situ Characterization and Quality Control of EDZ During Construction of Final Disposal Facility for Spent Nuclear Fuel  

Kim, Hyung-Mok (Department of Energy Resources and Geosystems Engineering, Sejong University)
Nam, Myung Jin (Department of Energy Resources and Geosystems Engineering, Sejong University)
Park, Eui-Seob (Deep Subsurface Storage and Disposal Research Center, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Tunnel and Underground Space / v.32, no.2, 2022 , pp. 107-119 More about this Journal
Abstract
Excavation-Disturbed Zone (EDZ) is an important design factor in constructing final disposal facilities for spent nuclear fuel, since EDZ affects mechanical stability including a spacing between disposal holes, and the hydraulic properties within EDZ plays a significant role in estimating in-flow rate of groundwater as well as a subsequent corrosion rate of a canister. Thus, it is highly required to characterize in-situ EDZ with precision and control the EDZ occurrence while excavating disposal facilities and constructing relevant underground research facilities. In this report, we not only reviewed EDZ-related researches carried out in the ONKALO facility of Finland but also examined appropriate methods for field inspection and quality control of EDZ occurrence. From the review, GPR can be the most efficient method for in-situ characterization of EDZ since it does not demand drilling a borehole that may disturb a surrounding environment of caverns. And the EDZ occurrence was dominant at a cavern floor and it ranged from 0 to 70 cm. These can provide useful information in developing necessary EDZ-related regulations for domestic disposal facilities.
Keywords
EDZ; In-situ characterization; Construction quality control; Final disposal facility; Spent nuclear fuel;
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Times Cited By KSCI : 4  (Citation Analysis)
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