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http://dx.doi.org/10.7843/kgs.2017.33.7.55

A Prediction of Thermal Conductivity for Compacted Bentonite Buffer in the High-level Radioactive Waste Repository  

Yoon, Seok (Radioactive Waste Disposal Research Division, KAERI)
Lee, Min-Soo (Radioactive Waste Disposal Research Division, KAERI)
Kim, Geon-Young (Radioactive Waste Disposal Research Division, KAERI)
Lee, Seung-Rae (Dept. of Civil and Environmental Eng., KAIST)
Kim, Min-Jun (Dept. of Civil and Environmental Eng., KAIST)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.7, 2017 , pp. 55-64 More about this Journal
Abstract
A geological repository has been considered one of the most adequate options for the disposal of high-level radioactive waste. A geological repository will be constructed in a host rock at a depth of 500~1,000 meters below the ground surface. The geological repository system consists of a disposal canister with packed spent fuel, buffer material, backfill material, and intact rock. The buffer is very important to assure the disposal safety of high-level radioactive waste. It can restrain the release of radionuclide and protect the canister from the inflow of groundwater. High temperature in a disposal canister is released into the surrounding buffer material, and thus the thermal transfer behavior of the buffer material is very important to analyze the entire disposal safety. Therefore, this paper presents a thermal conductivity prediction model for the Kyungju compacted bentonite buffer material which is the only bentonite produced in Korea. Thermal conductivity of Kyungju bentonite was measured using a hot wire method according to various water contents and dry densities. With 39 data obtained by the hot wire method, a regression model to predict the thermal conductivity of Kyungju bentonite was suggested.
Keywords
Compacted bentonite buffer; Thermal conductivity; Hot wire method; Regression analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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