Acknowledgement
This research was supported by the Nuclear Research and Development Program (NRF-2017M2A8A5014857) and Basic Research Project (2020R1F1A1072379) of the National Research Foundation of Korea.
References
- IAEA, Geological Disposal of Radioactive Waste. Safety Requirement, IAEA Safety Standards Series, 2006.
- L. Zheng, J. Rutqvist, J.T. Birkholzer, H.H. Liu, On the impact of temperatures up to 200 ℃ in clay repositories with bentonite engineered barrier systems: a study with coupled thermal, hydrological, chemical, and mechanical modeling, Eng. Geol. 197 (2015) 278-295. https://doi.org/10.1016/j.enggeo.2015.08.026
- M.V. Villar, P.L. Martin, J.M. Barcala, Modification of physical, mechanical and hydraulic properties of bentonite by thermo-hydraulic gradients, Eng. Geol. 81 (2006) 284-297. https://doi.org/10.1016/j.enggeo.2005.06.012
- P. Wersin, L.H. Johnson, I.G. McKinley, Performance of the bentonite barrier at temperatures beyond 100 ℃: a critical review, Phys. Chem. Earth 32 (2007) 780-788. https://doi.org/10.1016/j.pce.2006.02.051
- W.J. Cho, Bentonite Barrier Material for Radioactive Waste Disposal, KAERI/GP-535/2019, 2019.
- K.A. Daniel, J.F. Harrington, S.G. Zihms, A.C. Wiseall, Bentonite permeability at elevated temperature, Geoscience 7 (2017) 3. https://doi.org/10.3390/geosciences7010003
- S. Yoon, M.J. Kim, S.R. Lee, G.Y. Kim, Thermal conductivity estimation model of compacted bentonite buffer materials for a high-level radioactive waste repository, Nucl. Technol. 204 (2018) 213-226. https://doi.org/10.1080/00295450.2018.1471909
- Y.J. Cui, A.M. Tang, L.X. Qian, W.M. Ye, B. Chen, Thermal-mechanical behavior of compacted GMZ bentonite, Soils Found. 51 (6) (2011) 1065-1074. https://doi.org/10.3208/sandf.51.1065
- D. Meyer, J.J. Howard, Evaluation of Clays and Clay Minerals for Application to Repository Sealing. ONWI-486, Office of Nuclear Waste Isolation, 1983.
- B.M. Das, Principle of Geotechnical Engineering, sixth ed. Nelson, 2006.
- G. Montes-H, B. Fritz, A. Clement, N. Michau, A simplified method to evaluate the swelling capacity evolution of a bentonite barrier related to geochemical transformation, Appl. Geochem. 20 (2005) 409-422. https://doi.org/10.1016/j.apgeochem.2004.08.009
- J.O. Lee, H.J. Choi, G.Y. Kim, D.K. Cho, Numerical analysis of the effect of gapfilling options on the maximum peak temperature of a buffer in an HLW repository, Prog. Nucl. Energy 111 (2019) 138-149. https://doi.org/10.1016/j.pnucene.2018.11.007
- R. Pusch, Highly compacted sodium bentonite for isolating rock-deposited radioactive waste products, Nucl. Technol. 45 (1979) 153-157. https://doi.org/10.13182/NT79-A32305
- M.S. Kim, J.S. Jeon, M.J. Kim, J. Lee, S.R. Lee, A multi-objective optimization of initial conditions in a radioactive waste repository by numerical thermohydro-mechanical modelling, Comput. Geotech. 114 (2019) 103106. https://doi.org/10.1016/j.compgeo.2019.103106
- A.M. Tang, Y.J. Cui, T.T. Lee, A study on the thermal conductivity of compacted bentonite, Appl. Clay Sci. 41 (2008) 181-189. https://doi.org/10.1016/j.clay.2007.11.001
- Y. Xu, D. Sun, Z. Zeng, H. Lv, Temperature dependence of apparent thermal conductivity of compacted bentonite as buffer material for high-level radioactive waste repository, Appl. Clay Sci. 174 (2019) 10-14. https://doi.org/10.1016/j.clay.2019.03.017
- Y.G. Chen, X.M. Liu, W.M. Ye, Y.J. Cui, B. Chen, D.B. Wu, Thermal conductivity of compacted GO-GMZ bentonite used as buffer material for a high-level radioactive waste repository, Adv. Civ. Eng. (2018) 9530813, 2018.
- M.S. Lee, H.J. Choi, J.O. Lee, J.P. Lee, Improvement of the Thermal Conductivity of a Compact Bentonite Buffer, KAERI/TR, 2013, 5311/2013.
- J.O. Lee, K. Birch, H.J. Choi, Coupled thermal-hydro analysis of unsaturated buffer and backfill in a high-level waste repository, Ann. Nucl. Energy 72 (2014) 63-75. https://doi.org/10.1016/j.anucene.2014.04.027
- J.O. Lee, W.J. Cho, S. Kwon, Suction and water uptake in unsaturated compacted bentonite, Ann. Nucl. Energy 38 (2011) 520-526. https://doi.org/10.1016/j.anucene.2010.09.016
- D2487-17 ASTM, Standard Practice for Classification of Soils for Engineering Purpose (Unified Soil Classification System), ASTM International, West Conshohocken, PA, 2017.
- M. Yoo, H.J. Choi, M.S. Lee, S.Y. Lee, Measurement of properties of domestic bentonite for a buffer of an HLW repository, J. Nucl. Fuel Cycle Waste Technol. 14 (2) (2016) 135-147. https://doi.org/10.7733/JNFCWT.2016.14.2.135
- S. Yoon, W. Cho, C. Lee, G.Y. Kim, Thermal conductivity of Korean compacted bentonite buffer materials for a nuclear waste repository, Energies 11 (2018) 2269. https://doi.org/10.3390/en11092269
- C1113/C1113M-09 ASTM, Standard Test Method for Thermal Conductivity of Refractories by Hot Wire (Platinum Resistance Thermometer Technique), ASTM International, West Conshohocken, PA, 2019.
- J.J. Healy, J.J. de Groot, J. Kestin, The theory of the transient hot-wire method for measuring thermal conductivity, Physica 82C (1976) 392-408.
- M.V. Villar, A. Lloret, Influece of temperature on the hydro-mechanical behavior of a compacted bentonite, Appl. Clay Sci. 26 (2004) 337-350. https://doi.org/10.1016/j.clay.2003.12.026
- N.V. Nikhil, S.R. Lee, A hybrid feature selection algorithm integrating an extreme learning machine for landslide susceptibility modeling of Mt. Woomyeon, South Korea, Geomorphology 263 (2016) 50-70. https://doi.org/10.1016/j.geomorph.2016.03.023
- Y. He, K. Zhang, D. Wu, Experimental and modeling study of soil water retention curves of compacted bentonite considering salt solution effects, Geofluids (2019) 4508603, 2019.
- WP4C Dew Point Potentionmeter Operator's Manual, Decagon Devices Inc., 2015.
- L. Nguyen-Tuan, Coupled Thermos-Hydro-Mechanical Analysis: Experiment and Back Analysis, PhD Thesis, Ruhr-Universitat Bochum Germany, 2014.
- K.H. Jeon, Probabilistic Analysis of Unsaturated Soil Properties for Korean Weathered Granite Soil, Master Thesis, KAIST Korea, 2012.