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http://dx.doi.org/10.7733/jnfcwt.2022.015

Evaluation of Water Suction for Compacted Bentonite Buffer Under Elevated Temperature Conditions  

Yoon, Seok (Korea Atomic Energy Research Institute)
Lee, Deuk-Hwan (Korea Atomic Energy Research Institute)
Cho, Won-Jin (Korean Radioactive Waste Society)
Lee, Changsoo (Korea Atomic Energy Research Institute)
Cho, Dong-Keun (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.20, no.2, 2022 , pp. 185-192 More about this Journal
Abstract
A compacted bentonite buffer is a major component of engineered barrier systems, which are designed for the disposal of high-level radioactive waste. In most countries, the target temperature required to maintain safe functioning is below 100℃. If the target temperature of the compacted bentonite buffer can be increased above 100℃, the disposal area can be dramatically reduced. To increase the target temperature of the buffer, it is necessary to investigate its properties at temperatures above 100℃. Although some studies have investigated thermal-hydraulic properties above 100℃, few have evaluated the water suction of compacted bentonite. This study addresses that knowledge gap by evaluating the water suction variation for compacted Korean bentonite in the 25-150℃ range, with initial saturations of 0 and 0.22 under constant saturation conditions. We found that water suction decreased by 5-20% for a temperature increase of 100-150℃.
Keywords
Compacted bentonite buffer; Elevated temperature condition; Water suction;
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Times Cited By KSCI : 1  (Citation Analysis)
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