Thermal conductivity of compacted bentonite as a buffer material for a high-level radioactive waste repository

Lee, Jae Owan; Choi, Heui-Joo; Lee, Jong Youl

doi:10.1016/j.anucene.2016.04.053

Cited by 69 publications

(26 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is probably attributes to much higher thermal conductivity of graphene oxide than pure bentonite. Previous studies have con rmed that, for various bentonites, a linearity exists in thermal conductivity-dry density relationship, which includes MX-80 [58,59], Kunigel [60], FEBEX [61], GMZ [46] and Kyeongju bentonite [62]. is relationship has also been found in the bentonite-sand mixture [46,47].…”

Section: In Uence Of Dry Density Onmentioning

confidence: 85%

“…is is due to the increase of the interacting area between bentonite particles with increase in dry density. Nevertheless, the increasing rates are somewhat di erent for di erent bentonites, and this probably attributes to the di erences in their mineralogical composition, texture, and water content [62,64].…”

Section: In Uence Of Dry Density Onmentioning

confidence: 99%

“…According to the equations above, the thermal conductivity of GO-GMZ bentonite has a good linear relationship with its water content. However, Lee et al [62] reported that the thermal conductivity-water content relationship will become nonlinear when the water content is beyond 12%. Several studies used the sigmoidaltype equation to express this nonlinear relationship [61]:…”

Section: In Uence Of Water Content On Ermal Conductivitymentioning

confidence: 99%

See 2 more Smart Citations

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Chen

Liu

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

In China, Gaomiaozi (GMZ) bentonite serves as a feasible buffer material in the high-level radioactive waste (HLW) repository, while its thermal conductivity is seen as a crucial parameter for the safety running of the HLW disposal. Due to the tremendous amount of heat released by such waste, the thermal conductivity of the buffer material is a crucial parameter for the safety running of the high-level radioactive waste disposal. For the purpose of improving its thermal conductivity, this research used the graphene oxide (GO) to modify the pure bentonite and then the nanocarbon-based bentonite (GO-GMZ) was obtained chemically. The thermal conductivity of this modified soil has been measured and investigated under various conditions in this study: the GO content, dry density, and water content. Researches confirm that the thermal conductivity of the modified bentonite is codetermined by the three conditions mentioned above, namely, the value of GO content, dry density, and water content. Besides, the study proposes an improved geometric mean model based on the special condition to predict the thermal conductivity of the compacted specimen; moreover, the calculated values are also compared with the experimental data.

show abstract

Section: In Uence Of Dry Density Onmentioning

confidence: 85%

Section: In Uence Of Dry Density Onmentioning

confidence: 99%

Section: In Uence Of Water Content On Ermal Conductivitymentioning

confidence: 99%

See 1 more Smart Citation

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Chen

Liu

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…This test is based on a Transient Plane Source Technology, which allows for measurement of thermal conductivity, thermal diffusivity as well as volumetric heat capacity during a single test. This technology has been successfully used for measuring thermal properties of compacted bentonite (Ye et al 2010;Lee et al 2016). The method provides efficient and accurate thermal property measurements at laboratory and elevated temperatures as well as flexibility to test brittle samples in the compaction mould (see one-sided method below).…”

Section: Thermal Property Device and Test Proceduresmentioning

confidence: 99%

“…Several experimental studies have examined the thermal behavior of geo-materials over different conditions including material composition, dry density, saturation, and temperature (Coulon et al 1987;Beziat et al 1988;Radhakrisha et al 1989;Suzuki et al 1992;Borgensson et al 1994;Graham et al 1997;Madsen 1998;Villar 2002;Ould-Lahoucine et al 2002;Engelhardt and Finsterle 2003;Tang et al 2008;Ye et al 2010;Man et al 2011;Kim et al 2012;Likos 2014;Lee et al 2016). Baumgartner et al (2006) estimated the thermal conductivity and specific heat capacity of bentonite materials based on their composition and density.…”

Section: R a F Tmentioning

confidence: 99%

Thermal properties of engineered barriers for a Canadian deep geological repository

Abootalebi

Siemens

2018

Can. Geotech. J.

View full text Add to dashboard Cite

Global energy needs continue to rise along with society’s desire for carbon-reduced energy sources to limit climate change effects. One viable carbon-reduced energy source is nuclear power, which provides more than half the electricity requirements of the province of Ontario. Within Canada there are more than 2.5 million bundles of spent nuclear fuel, which will be stored in a deep geological repository. Efficiency of the repository system depends on dissipation of thermal energy. A comprehensive experimental study is presented on thermal properties of barrier materials. The influence of bentonite type, variability, moisture, and temperature on thermal properties is examined. Results show strong influence of moisture on thermal properties, some influence of temperature on low-density bentonite, minor influence of bentonite type, as well as low variability in the experimental measurements. The extensive database of physical measurements is compared with values from the literature and then used to statistically evaluate thermal property models selected from the literature. Using the base parameters from the literature, thermal property models performed adequately; however, soil-specific calibration of the model inputs improved the fit significantly. These results are now available to perform the numerical models for the proposed Canadian deep geological repository for used nuclear fuel.

show abstract

Laboratory Investigation of Anisotropic Shrinkage of HLW Buffer Block: An Attempt Using Digital Image Correlation Method

Tan

Luo

2018

Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2

View full text Add to dashboard Cite

Thermal conductivity of compacted bentonite as a buffer material for a high-level radioactive waste repository

Cited by 69 publications

References 16 publications

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Thermal Conductivity of Compacted GO-GMZ Bentonite Used as Buffer Material for a High-Level Radioactive Waste Repository

Thermal properties of engineered barriers for a Canadian deep geological repository

Laboratory Investigation of Anisotropic Shrinkage of HLW Buffer Block: An Attempt Using Digital Image Correlation Method

Contact Info

Product

Resources

About