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Abstract: Bentonite buffer is a key element in a high-level radioactive waste (HLW) repository as it dissipates decay heat from the waste to the surrounding rock. This article looked at Kyeongju bentonite as a candidate buffer material and investigated the dependence of thermal conductivity on various experimental conditions. A Hot Disk TPS 500S instrument was used to measure thermal conductivity using the transient plane source method. Thermal conductivity was found to increase with an increase in water content and dry density of bentonite.

Reference: Annals of Nuclear Energy, 94: 848-855

DOI: 10.1016/j.anucene.2016.04.053