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Journal articles on the topic 'COx claystone'

Author: Grafiati

Published: 22 May 2022

Last updated: 30 July 2025

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1

Zeng, Zhixiong, Yu-Jun Cui, Nathalie Conil, and Jean Talandier. "Investigating the contribution of claystone to the swelling pressure of its mixture with bentonite." E3S Web of Conferences 195 (2020): 03043. http://dx.doi.org/10.1051/e3sconf/202019503043.

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Compacted MX80 bentonite/Callovo-Oxfordian (COx) claystone mixture has been considered as a possible sealing/backfilling material in the French deep geological radioactive waste disposal. The swelling pressure of such mixture is an important factor in the design and long-term safety assessment of deep geological repositories. In this study, constant-volume swelling pressure tests were performed on the mixtures with different claystone fractions and dry densities. The test results show that the swelling pressure of the mixtures decreased with the increasing claystone fraction and decreasing dry

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2

Wang, Hao, Yu-Jun Cui, Minh-Ngoc Vu, and Jean Talandier. "Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone." E3S Web of Conferences 382 (2023): 25008. http://dx.doi.org/10.1051/e3sconf/202338225008.

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In this study, the compression behaviour of unsaturated damaged COx claystone is investigated by performing high pressure oedometer tests with controlled suction. The damaged oedometer samples were prepared by shearing the claystone in triaxial conditions. Four high pressure oedometer tests were conducted using different controlled suctions. The effects of suction and damage on the swelling and compression were investigated in oedometer. Results show that the intact claystone exhibits a larger swelling strain than that of the damaged one at the same imposed suction. The damaged claystone at a

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3

Do, Duc-Phi, Ngoc-Tuyen Tran, Dashnor Hoxha, Minh-Ngoc Vu, and Gilles Armand. "Time-Dependent Behavior of Callovo-Oxfordian Claystone for Nuclear Waste Disposal: Uncertainty Quantification from In-Situ Convergence Measurements." Sustainability 14, no. 14 (2022): 8465. http://dx.doi.org/10.3390/su14148465.

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The sustainability of geotechnical infrastructures is closely linked with their long-time behavior. In fact, there is not a straightforward procedure to predict this behavior, and very often, the back analyses of observed data are the best tool to understand their long-time response. In-situ observations of drifts constructed in the Callovo-Oxfordian (COx) claystone, the potential host formation for geological radioactive waste disposal, in France exhibit a progressive convergence. These convergence measurements with quite significant dispersions reveal a considerable uncertainty of time-depen

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4

Song, Yang, C. A. Davy, P. Bertier, F. Skoczylas, and J. Talandier. "On the porosity of COx claystone by gas injection." Microporous and Mesoporous Materials 239 (February 2017): 272–86. http://dx.doi.org/10.1016/j.micromeso.2016.10.017.

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5

Tyri, Danai, Irini Djeran-Maigre, Jean-Claude Robinet, and Jad Zghondi. "A parametric study on the hydromechanical properties of claystone/bentonite mixtures." E3S Web of Conferences 382 (2023): 19002. http://dx.doi.org/10.1051/e3sconf/202338219002.

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Mixtures of crushed excavated COx claystone and bentonite are considered as a potential backfill solution for the French disposal concept of radioactive waste. In the present work, the hydro-mechanical behaviour of claystone/sodium bentonite mixtures was experimentally investigated for various bentonite contents (≤40% in total mass) and densities. Demineralized, site water and cementitious alkaline solution were used. Test on mixtures physicochemical properties showed that Plasticity Index (PI) and Free Swelling Index (FSI) values increase with bentonite content. Introducing bentonite in the m

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6

Harrington, J. F., R. de la Vaissière, D. J. Noy, R. J. Cuss, and J. Talandier. "Gas flow in Callovo-Oxfordian claystone (COx): results from laboratory and field-scale measurements." Mineralogical Magazine 76, no. 8 (2012): 3303–18. http://dx.doi.org/10.1180/minmag.2012.076.8.43.

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AbstractTo understand the fate and impact of gas produced within a repository for radioactive waste, a series of laboratory and field scale experiments have been performed on the Callovo-Oxfordian claystone (COx), the proposed host rock for the French repository. Results show the movement of gas is through a localized network of pathways, whose properties vary temporarily and spatially within the claystone. Significant evidence exists from detailed laboratory studies for the movement of gas along highly unstable pathways, whose aperture and geometry vary as a function of local stress, gas and

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7

Xu, Hao, Jonny Rutqvist, Carlos Plúa, Gilles Armand, and Jens Birkholzer. "Modeling of thermal pressurization in tight claystone using sequential THM coupling: Benchmarking and validation against in-situ heating experiments in COx claystone." Tunnelling and Underground Space Technology 103 (September 2020): 103428. http://dx.doi.org/10.1016/j.tust.2020.103428.

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8

Wang, Chuanrui, Nicolas Gay, Jean Talandier, and Frédéric Skoczylas. "Poroelastic experiments on COx claystone: Insight from the Biot's coefficient measurement with water." Engineering Geology 300 (April 2022): 106580. http://dx.doi.org/10.1016/j.enggeo.2022.106580.

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9

Song, Yang, C. A. Davy, D. Troadec, et al. "Multi-scale pore structure of COx claystone: Towards the prediction of fluid transport." Marine and Petroleum Geology 65 (August 2015): 63–82. http://dx.doi.org/10.1016/j.marpetgeo.2015.04.004.

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10

Yuan, Haifeng, Franck Agostini, Frédéric Skoczylas, and Jean Talandier. "About adsorption effects on the poroelastic properties and gas permeability of COx claystone." European Journal of Environmental and Civil Engineering 24, no. 2 (2017): 267–82. http://dx.doi.org/10.1080/19648189.2017.1379444.

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11

Yu, Zhan, Jian-Fu Shao, Gilles Duveau, Minh-Ngoc Vu, and Carlos Plua. "Numerical simulation of gas injection induced hydro-Mechanical coupling and damage in COx claystone." Geomechanics for Energy and the Environment 41 (March 2025): 100643. https://doi.org/10.1016/j.gete.2025.100643.

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12

Bluthé, Joffrey, Benoît Bary, and Eric Lemarchand. "Micromechanical modeling of the Compression of the Damaged Zone experiment in the Callovo-Oxfordian formation." Advances in Geosciences 45 (July 24, 2018): 25–33. http://dx.doi.org/10.5194/adgeo-45-25-2018.

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Abstract. A theoretical model of the Compression of the Damaged Zone experiment is proposed. The tools of micromechanics are used to represent the fractured zone. Assuming an elastic behavior of the sound COx claystone and a simplified geometry of the drift, an analytical solution is presented and the crack closure is determined as a function of distance from the drift wall for two loading cases: a prescribed 4 MPa pressure and a stress-free strain with 1 % average value to describe the swelling due to resaturation. The results are in agreement with experimental observations and give insights

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13

Souley, M., M. N. Vu, E. D. Coarita-Tintaya, G. Armand, and F. Golfier. "Effect of short- and long-term nonlinear behaviour on the thermoporomechanical pressurisation in COx claystone." International Journal of Rock Mechanics and Mining Sciences 175 (March 2024): 105650. http://dx.doi.org/10.1016/j.ijrmms.2024.105650.

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14

Yuan, Yilong, Tianfu Xu, Fabrizio Gherardi, and Hongwu Lei. "Thermo-Hydro-Mechanical Coupled Modeling of In-Situ Behavior of the Full-Scale Heating Test in the Callovo-Oxfordian Claystone." Energies 15, no. 11 (2022): 4089. http://dx.doi.org/10.3390/en15114089.

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Within the context for deep geological disposal (DGD) of high-level radioactive waste (HLW), thermo-hydro-mechanical (THM) coupled numerical modeling has become significantly important for studying the safe disposal of HLW. In this work, a 3D mechanical module is incorporated into the thermal–hydraulic (TH) coupled code TOUGH2, thus forming an integrated THM coupled simulator referred to as TOUGH2Biot. The Galerkin finite element method is used to discretize the space for rock mechanical calculation. The mechanical process is sequentially coupled with the fluid and heat flow processes, which f

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15

Zeng, Zhixiong, Yu-Jun Cui, Feng Zhang, Nathalie Conil, and Jean Talandier. "Effect of technological voids on swelling behaviour of compacted bentonite–claystone mixture." Canadian Geotechnical Journal 57, no. 12 (2020): 1881–92. http://dx.doi.org/10.1139/cgj-2019-0339.

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The effect of technological voids on the swelling pressure of compacted MX80 bentonite–Callovo-Oxfordian (COx) claystone mixture was investigated by simulating the technological voids with a pre-defined space between the compacted disks of the mixture. Both axial and radial swelling pressures were monitored. After the tests, the microstructure of samples at different positions was investigated using mercury intrusion porosimetry (MIP), together with the determination of dry density and water content. Results showed that two main processes, filling and homogenization, occurred during soil hydra

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16

Necib, Sophia, Fréderic Bumbieler, Claude Duret-Thual, Nicolas Bulidon, Didier Crusset, and Pierre Combrade. "Assessment of the resistance to environmentally assisted cracking (EAC) of C-steel casing and overpack in the COx claystone." Corrosion Engineering, Science and Technology 52, sup1 (2017): 95–100. http://dx.doi.org/10.1080/1478422x.2017.1336003.

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17

Jung, Sophie, Siavash Ghabezloo, Michel Bornert, et al. "A new experimental device developed to study the creeping behavior of a rock joint under shear stress." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (2023): 012065. http://dx.doi.org/10.1088/1755-1315/1124/1/012065.

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Abstract In the context of nuclear waste management project Cigeo, the behavior of the fractured Callovo Oxfordian claystone (COx) is studied for its time dependent effect on the long term convergences of the drifts. We present an experimental setup designed to investigate the viscous behavior of a fracture. While few experimental setup already exist with the purpose of studying the time dependent deformation of a rock joint, all of them measure the displacement in the direction of the sheared discontinuities in one point of the sample with devices such as a linear variable displacement transd

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18

Djizanne, Hippolyte, Jad Zghondi, Gilles Armand, Nathalie Conil, and Rémi de La Vaissière. "Some aspects of the hydro-mechanical behaviour of Callovo-Oxfordian (COx) claystone around a gallery parallel to the principal horizontal minor stress." Geomechanics for Energy and the Environment 17 (March 2019): 3–15. http://dx.doi.org/10.1016/j.gete.2018.11.003.

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19

Wang, Jinsheng, Weihai Cai, Rui Zuo, and Can Du. "A Study of Sr Sorption Behavior in Claystone from a Candidate High-Level Radioactive Waste Geological Disposal Site under the Action of FeOOH Colloids." International Journal of Environmental Research and Public Health 19, no. 16 (2022): 9970. http://dx.doi.org/10.3390/ijerph19169970.

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Colloids have a significant influence on the migration of nuclides in claystone, which is an important geological barrier. The sorption of strontium on claystone in the presence of FeOOH colloids was investigated in samples from the Suhongtu site, a candidate high-level radioactive waste disposal site in China. The effects of colloid amount, solid content, and pH were investigated by batch tests, and the sorption reaction mechanism was analyzed by kinetic modeling and microscopic characterization techniques. The results indicate that the sorption of Sr by claystone increased with the solids co

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20

Czömpöly, Ottó, Fruzsina Szabó, Margit Fábián, et al. "Retention of Nickel and Cobalt in Boda Claystone Formation." Minerals 14, no. 12 (2024): 1299. https://doi.org/10.3390/min14121299.

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The Boda Claystone Formation (BCF) is considered to serve as a natural barrier to the potential high-level radioactive waste repository in Hungary. In order to evaluate the radionuclide retention capacity of the albitic claystone of the BCF, the adsorption and diffusion properties of the rock for Ni2+ and Co2+ cations (activation products) were investigated separately and in competitive conditions when the two ions were simultaneously added. Batch sorption experiments were performed with powdered and conditioned albitic claystone samples in synthetic pore water to obtain adsorption isotherms.

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21

Sweet, A. R., D. R. Braman, and J. F. Lerbekmo. "Sequential palynological changes across the composite Cretaceous-Tertiary (K-T) boundary claystone and contiguous strata, western Canada and Montana, U.S.A." Canadian Journal of Earth Sciences 36, no. 5 (1999): 743–68. http://dx.doi.org/10.1139/e98-061.

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The boundary claystone in the western Canada Basin is composed of three intimately associated layers with a regional distribution: a basal brownish-grey hackly claystone, a middle brownish-black satiny claystone, and an upper brown laminated shale. These layers appear to represent a graded succession in terms of grain size and depositional rate. An abrupt reduction in the relative abundance of gymnospermous pollen, representing canopy vegetation, immediately precedes the hackly layer. The hackly claystone is accepted as being originally formed of microtektites from a ballistically transported

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22

Berthe, G., S. Savoye, C. Wittebroodt, and J. L. Michelot. "Changes in containment properties of claystone caprocks induced by dissolved CO2 seepage." Energy Procedia 4 (2011): 5314–19. http://dx.doi.org/10.1016/j.egypro.2011.02.512.

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23

Hadian, Pooya, and Reza Rezaee. "The Effect of Supercritical CO2 on Shaly Caprocks." Energies 13, no. 1 (2019): 149. http://dx.doi.org/10.3390/en13010149.

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The effect of supercritical CO2 on the shaly caprocks is one of the critical issues to be considered in CO2 sequestration programs. Shale-scCO2 interactions can alter the seal integrity, leading to environmental problems and bringing into question the effectiveness of the program altogether. Several analytical studies were conducted on samples from Jurassic Eneabba Basal Shale and claystone rich facies of the Triassic Yalgorup Member (725–1417 m) in the Harvey CO2 sequestration site, Western Australia, to address the shale-scCO2 interactions and their effect on the petrophysical properties of

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24

Weibel, R., C. Kjøller, K. Bateman, T. Laier, L. H. Nielsen, and G. Purser. "Carbonate dissolution in Mesozoic sand- and claystones as a response to CO2 exposure at 70°C and 20MPa." Applied Geochemistry 42 (March 2014): 1–15. http://dx.doi.org/10.1016/j.apgeochem.2013.12.006.

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25

Baldermann, Andre, Ronny Boch, Volker Reinprecht, and Claudia Baldermann. "Mechanism of Carbon Monoxide (CO) Generation and Potential Human Health Hazard during Mechanized Tunnel Driving in Organic-Rich Rocks: Field and Laboratory Study." Sustainability 16, no. 18 (2024): 8107. http://dx.doi.org/10.3390/su16188107.

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The monitoring of carbon emissions is increasingly becoming a sustainability issue worldwide. Despite being largely unnoticed, the toxic gas carbon monoxide (CO) is ubiquitous in mechanized tunnel driving, but the individual sources, release and enrichment mechanisms are often unknown. In this study, the generation of CO from organic matter containing sedimentary rocks was investigated during mechanized tunnel driving and by reacting claystone and sandstone with 10 mM NaCl solutions for 2 months at 70 °C and 140 °C. The mineralogical and geochemical evolution of the solids and fluids was asses

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26

Łączny, Marian Jacek, Sebastian Iwaszenko, and Adam Smoliński. "Process Kinetics of the Carbonation of Fly Ashes: A Research Study." Materials 14, no. 2 (2021): 253. http://dx.doi.org/10.3390/ma14020253.

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The aim of the paper is to present the results of research on the carbonation process kinetics of coal combustion ashes originating from fluidized bed boilers used in power plants. Based on the thermogravimetric analysis (TGA), the hypothesis that carbon dioxide is bounded by the mineral substances (calcium compounds) in the fly ashes was confirmed. Determining the kinetic parameters of the carbonation of fly ashes requires simultaneously taking into consideration the kinetics of the drying process of the sample. The drying process of the sample masks the effect of the reaction of CO2 with cal

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27

Goldie Divko, Louise, Geoffrey O'Brien, Michael Harrison, and Joseph Hamilton. "Evaluation of the regional top seal in the Gippsland Basin: implications for geological carbon storage and hydrocarbon prospectivity." APPEA Journal 50, no. 1 (2010): 463. http://dx.doi.org/10.1071/aj09028.

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GeoScience Victoria and partners have undertaken the first detailed basin-wide study of the regional top seal in the Gippsland Basin. The Gippsland Basin is an attractive site for geological carbon storage (GCS) because of the close proximity to emission sources and the potential for large-scale storage projects. This top seal assessment involved the analysis of seal attributes (geometry, capacity and mineralogy) and empirical evidence for seal failure (soil gas geochemical anomalies, gas chimneys, hydrocarbon seepage and oil slicks). These datasets have been integrated to produce a qualitativ

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28

MacDonald, Justin, Rosalind King, Richard Hillis, and Guillaume Backé. "Structural style of the White Pointer and Hammerhead Delta—deepwater fold-thrust belts, Bight Basin, Australia." APPEA Journal 50, no. 1 (2010): 487. http://dx.doi.org/10.1071/aj09029.

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GeoScience Victoria and partners have undertaken the first detailed basin-wide study of the regional top seal in the Gippsland Basin. The Gippsland Basin is an attractive site for geological carbon storage (GCS) because of the close proximity to emission sources and the potential for large-scale storage projects. This top seal assessment involved the analysis of seal attributes (geometry, capacity and mineralogy) and empirical evidence for seal failure (soil gas geochemical anomalies, gas chimneys, hydrocarbon seepage and oil slicks). These datasets have been integrated to produce a qualitativ

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29

Hofbauer, Barbara, Sebastian Viehmann, Susanne Gier, Stefano M. Bernasconi, and Patrick Meister. "Microfacies and C/O-isotopes in lacustrine dolomites reflect variable environmental conditions in the Germanic Basin (Arnstadt Formation, Upper Triassic)." Austrian Journal of Earth Sciences 114, no. 1 (2021): 66–87. http://dx.doi.org/10.17738/ajes.2021.0004.

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Abstract The conditions in ancient evaporative environments conducive to authigenic carbonate (especially dolomite [CaMg(CO3)2]) formation are still insufficiently understood. Insights from microfacies analysis can help to constrain the conditions in these environments. We provide a brief overview of the microfacies association and carbon and oxygen isotope compositions of dolomite beds intercalated in a claystone-rich succession from the Norian Arnstadt Formation in Thuringia and Lower Saxony (Germany) in order to gain further insight into the depositional conditions and processes leading to

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30

Luxton, C. W., S. T. Horan, D. L. Pickavance, and M. S. Durham. "THE LA BELLA AND MINERVA GAS DISCOVERIES, OFFSHORE OTWAY BASIN." APPEA Journal 35, no. 1 (1995): 405. http://dx.doi.org/10.1071/aj94026.

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In the past 100 years of hydrocarbon exploration in the Otway Basin more than 170 exploration wells have been drilled. Prior to 1993, success was limited to small onshore gas fields. In early 1993, the La Bella-1 and Minerva-1 wells discovered significant volumes of gas in Late Cretaceous sandstones within permits VIC/P30 and VIC/P31 in the offshore Otway Basin. They are the largest discoveries to date in the basin and have enabled new markets to be considered for Otway Basin gas. These discoveries were the culmination of a regional evaluation of the Otway Basin by BHP Petroleum which highligh

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31

Lisk, M., S. C. George, R. E. Summons, R. A. Quezada, and G. W. O'Brien. "MAPPING HYDROCARBON CHARGE HISTORIES: DETAILED CHARACTERISATION OF THE SOUTH PEPPER OIL FIELD, CARNARVON BASIN." APPEA Journal 36, no. 1 (1996): 445. http://dx.doi.org/10.1071/aj95024.

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The South Pepper Field is a small hydrocarbon accumulation located in the Barrow Sub-basin, North West Shelf. In this study, an integrated approach has been adopted which uses new analytical approaches, and combines fluid inclusion, micro and conventional GC-MS, stable isotope, mineralogical and petrological data, to allow the accurate reconstruction of the charge history of this field. The micro GC-MS work on oil-bearing fluid inclusions in the reservoir section allows, for the first time, a comparison to be made between the geochemical characteristics of the presently reservoired oil with sa

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32

BERTIER, PIETER, RUDY SWENNEN, RAYMOND KEMPS, BEN LAENEN, and ROLAND DREESEN. "Reservoir characteristics and diagenesis of the Buntsandstein sandstones in the Campine Basin (NE Belgium)." Geologica Belgica 25, no. 3-4 (2022): 145–84. http://dx.doi.org/10.20341/gb.2022.004.

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The red beds of the Buntsandstein (Early Triassic) in the Campine Basin (NE Belgium) display porosities between 5.3–20.2% (average 13.7%) and permeabilities varying between 0.02–296.4 mD (average 38.7 mD). Knowledge of their reservoir controlling properties, which today are missing, is important in view of potential geological storage of CO2 or natural gas and geothermal reservoir potential within these sandstones. Therefore the effects of diagenesis were assessed based on petrography, stable isotope analyses, fluid inclusion microthermometry, X-ray diffraction, electron microprobe and porosit

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33

PIEŃKOWSKI, GRZEGORZ, GRZEGORZ NIEDŹWIEDZKI, and MARTA WAKSMUNDZKA. "Sedimentological, palynological and geochemical studies of the terrestrial Triassic–Jurassic boundary in northwestern Poland." Geological Magazine 149, no. 2 (2011): 308–32. http://dx.doi.org/10.1017/s0016756811000914.

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AbstractThe Kamień Pomorski IG-1 borehole (Pomerania, NW Poland) yields a profile through the Triassic–Jurassic (T–J) transition in continental deposits. An integrated study of the sedimentology, sequence stratigraphy, palynology, biostratigraphy and geochemistry of these deposits has been carried out on the boundary interval, which represents a time of major environmental change. Two lithological units within the transitional section are distinguished: the Lower–Middle Rhaetian Wielichowo Beds of alluvial plain facies, which shows evidence of a semi-arid climate, and the Upper Rhaetian to Low

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34

Do, Duc Phi, Minh Ngoc Vu, Truong Toan Nguyen, Dashnor Hoxha, and Gilles Armand. "Uncertainty Quantification of the Short‐ and Long‐Term Behavior of COx Claystone and Reliability Analysis of the IL‐LLW Repository's Concrete Liner Based on In Situ Convergence Data." International Journal for Numerical and Analytical Methods in Geomechanics, January 23, 2025. https://doi.org/10.1002/nag.3949.

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ABSTRACTThe excavation‐induced fractured zone (EFZ) and the anisotropic evolution in time of drifts’ convergence, as observed in the Mesue/Haute‐Marne Underground Researche Laboratory (MHM URL), reveal the complex behavior of Callovo‐Oxfordian (COx) claystone, the host formation for geological radioactive waste disposal project (Cigéo) in France. Especially, the dispersion of the in situ convergence monitoring exhibits the non‐negligible uncertainty of the host rock properties that must be quantified and considered in the stability analysis of the repositories’ support systems. In this work, t

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35

Radeisen, Eike, Hua Shao, Michael Pitz, Jürgen Hesser, Olaf Kolditz, and Wenqing Wang. "Combination of a Failure Index and a Dilatancy-Dependent Permeability Model in Hydro-Mechanically-Coupled Numerical Simulations of Argillaceous Rock Formations of the Callovo-Oxfordian (COx)." Rock Mechanics and Rock Engineering, April 15, 2024. http://dx.doi.org/10.1007/s00603-024-03763-3.

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AbstractHydraulic-mechanical coupling in claystone is of great importance for repository research, as claystone is considered a possible host rock and hydraulic-mechanical coupled processes can affect the integrity of the barrier. Of particular importance in this context are excavation damage zones and hydraulically-induced microcracks and fractures. In this work, two constitutive equations developed for these hydraulic-mechanical coupled processes are combined in a novel way. The approach exploits the different dominant stress states that prevail in the respective processes. This approach is

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36

Dizier, Arnaud, Marc Scibetta, Gilles Armand, et al. "Stability analysis and long term behaviour of deep tunnels in clay formation." Geological Society, London, Special Publications 536, no. 1 (2023). http://dx.doi.org/10.1144/sp536-2022-86.

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Abstract Demonstrating the feasibility of constructing tunnels in deep clay formations is an important goal of the Belgian RD&D programme on the geological disposal of radioactive waste. In 2002 a major achievement was reached when the HADES Underground Research Laboratory (URL) in Boom Clay was extended with the construction of the Connecting Gallery. This demonstrated that it is feasible to construct galleries in poorly indurated clays using industrial techniques. To monitor the mechanical behaviour of the gallery and assess its stability, strain gauges were embedded in the segmental gal

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37

Souley, M., M. N. Vu, G. Armand, and C. Plua. "Constitutive Model for Thermal Compaction of Clayey Geomaterials and Application to COx Claystone." Rock Mechanics and Rock Engineering, September 4, 2023. http://dx.doi.org/10.1007/s00603-023-03478-x.

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38

Debure, Mathieu, Yannick Linard, Christelle Martin, and Francis Claret. "In situ nuclear-glass corrosion under geological repository conditions." npj Materials Degradation 3, no. 1 (2019). http://dx.doi.org/10.1038/s41529-019-0100-7.

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Abstract Silicate glasses are durable materials but laboratory experiments reveal that elements that derive from their environment may induce high corrosion rates and reduce their capacity to confine high-level radioactive waste. This study investigates nuclear-glass corrosion in geological media using an in situ diffusion experiment and multi-component diffusion modelling. The model highlights that the pH imposed by the Callovo–Oxfordian (COx) claystone host rock supports secondary-phase precipitation and increases glass corrosion compared with pure water. Elements from the COx rock (mainly M

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39

Carriere, Charly, Alexis Delanoë, Stéphane Gin, et al. "Effect of a cement-bentonite grout on AVM glass alteration and C-steel corrosion at nanometer scale." Corrosion Engineering, Science and Technology: The International Journal of Corrosion Processes and Corrosion Control, January 21, 2025. https://doi.org/10.1177/1478422x241310412.

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Two experimental mockups were operated for one year at 70°C to study the corrosion of C-steel and alteration of AVM glass surrounded by Cox claystone. Only one system included cement-bentonite grout (CBG). Nanometer-scale analyses (TEM, XANES) examined the glass/C-steel interface to assess CBG's effects. The most notable difference was the presence of a nanometric magnetite layer on the C-steel surface in the CBG system. This layer, promoted by the slightly alkaline pH (8–10) solution influenced by CBG, could act as a passivating barrier, potentially mitigating corrosion, although corrosion ra

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Alonso, Matias, Jean Vaunat, Jean Talandier, Minh-Ngoc Vu, Antonio Gens, and Sebastià Olivella. "Numerical modelling of a large-diameter sealing structure in a deep radioactive waste repository." Symposium on Energy Geotechnics 2023, October 3, 2023. http://dx.doi.org/10.59490/seg.2023.595.

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There is a consensus that deep geological disposal is one of the most appropriated solution to store radioactive waste, and that argillaceous rocks have great potential as possible geological host formation. In this context, The French National Radioactive Waste Management Agency (Andra), is leading the design of a deep geological radioactive waste repository to be located in the Callovo-Oxfordian claystone (COx), at about 500 m depth (Cigéo project). Radioactive waste disposal aims to protect the environment over a period of several thousands of years. For this purpose, these facilities

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Song, Fei, Matías Alonso, Stefano Collico, and Antonio Gens. "Numerical simulations of thermal fracturing in nuclear waste disposal." Symposium on Energy Geotechnics 2023, October 2, 2023. http://dx.doi.org/10.59490/seg.2023.579.

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Regarding high-level nuclear waste (HLW) and spent fuel (SF) disposal, underground geological disposal is likely to be the most feasible and effective solution [1]. The coupled Thermo-Hydro-Mechanical (THM) behaviour of host rocks has been widely studied by laboratory tests, in-situ experiments and numerical analyses. In field experiments performed in underground laboratories, pore pressure generation and damage evolution have been observed. In this context, coupled THM numerical analyses can be an essential tool to better understand the coupled multiphysics behaviour of host rocks, buffer mat

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Schumacher, Sandra, and Werner Gräsle. "Constitutive equation for Young’s modulus in clay-rich rocks: adding complexity, reducing uncertainty." Environmental Earth Sciences 84, no. 10 (2025). https://doi.org/10.1007/s12665-025-12261-w.

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Abstract Clay-rich rocks such as marls and claystones are of great interest for many applications which include the storage of CO2 or the storage of spent nuclear fuel. These rocks are either regarded as potential host rocks or as caprocks. As both CO2 storage and a nuclear waste repository require a long-term stability of the rocks under changing stress conditions, Young’s modulus is a critical parameter as it describes the stiffness of the material. Up until now, Young’s modulus is regarded as a constant with large error bars in numerical models even though it depends on several parameters.

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Rast, Markus, Claudio Madonna, Paul A. Selvadurai, Quinn C. Wenning, and Jonas B. Ruh. "Importance of Water‐Clay Interactions for Fault Slip in Clay‐Rich Rocks." Journal of Geophysical Research: Solid Earth 129, no. 4 (2024). http://dx.doi.org/10.1029/2023jb028235.

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AbstractClay‐rich rocks are integral to subduction zone dynamics and of practical importance, for example, as barriers in nuclear waste and CO2 repositories. While the effects of swelling strain on the self‐sealing capabilities of these rocks are relatively well‐established, the implications of polar fluids interacting with charged clay particles on the frictional behavior, and the role of swelling stress in initiating slip in critically stressed faults, remain ambiguous. To address these uncertainties, we conducted triaxial friction experiments using saw‐cut samples, with the upper half compo

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