Short- and long-term behaviors of drifts in the Callovo-Oxfordian claystone at the Meuse/Haute-Marne Underground Research Laboratory

Armand, Gilles; Noiret, A.; Zghondi, Jad; Seyedi, Darius

doi:10.1016/j.jrmge.2013.05.005

Cited by 129 publications

(80 citation statements)

References 6 publications

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“…The permeability of the unaltered argillaceous rock is assumed equal to 5×10 -20 m 2 (with a range of 1×10 -19 m 2 to 1×10 -21 m 2 ). This value is also consistent with the range of permeability values measured in argillaceous formations currently under investigation as potential host rock for HLW disposal, such as the Callovo-Oxfordian Argillites (e.g., ANDRA 2005, Armand et al 2013, and the Opalinus Clay (e.g., NAGRA 2002; Croisé et al 2004). The same value was also adopted by Bianchi et al (2013;.…”

Section: Generic Argillite/shale Disposal Reference Case August 2014 21supporting

confidence: 86%

“…For these conditions, the EDZ could then act as a preferential flow path for advective transport and thereby speed up radionuclide migration toward the biosphere. The EZD properties and their evolution over time have been analyzed in laboratory and field studies (Bossart et al 2004;Baechler et al 2011;Armand et al 2013). These investigations suggest that a partial or complete self-sealing of fractures due to clay swelling and creep within the EDZ is possible after a certain amount of time.…”

Section: Excavated Disturbed Zone (Edz)mentioning

confidence: 99%

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Generic Argillite/Shale Disposal Reference Case

Zheng¹,

Colon²,

Bianchi³

et al. 2014

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Section: Generic Argillite/shale Disposal Reference Case August 2014 21supporting

confidence: 86%

Section: Excavated Disturbed Zone (Edz)mentioning

confidence: 99%

Generic Argillite/Shale Disposal Reference Case

Zheng¹,

Colon²,

Bianchi³

et al. 2014

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“…The major convergence is measured in the horizontal direction ( Fig. 13) which corresponds to the location of the fractures around the gallery [1]. Furthermore, experimental measurements also indicate that the gallery convergence increases in the long term but in a much larger amplitude, especially in the horizontal direction.…”

mentioning

confidence: 84%

“…The modelling is performed for an isotropic plasticity and with the average parameters of [-] e 1 [-] e 3…”

Section: Extensional Propertiesmentioning

confidence: 99%

“…To assure a safe repository on the long term, the behaviour of the possible host formations and of the underground structures, where the most hazardous type of wastes will be stored, need to be defined and Many experimental measurements and observations in the considered argillaceous rock have highlighted that damage and fracturing around the galleries play an important role in the hydro-mechanical behaviour of the Excavation aged Zone (EDZ) [1,2]. The latter is a zone that develops around underground galleries due to the drilling process and which is dominated by irreversible hydromechanical property changes.…”

Section: Introductionmentioning

confidence: 99%

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Modelling the influence of strain localisation and viscosity on the behaviour of underground drifts drilled in claystone

Pardoen

Collin

2017

Computers and Geotechnics

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In the context of the deep geological repository of nuclear wastes, Andra con- Email address: f.collin@ulg.ac.be (F. Collin) 1 FRIA, F.R.S.-FNRS scholarship holder Preprint submitted to Computers and Geotechnics March 18, 2016 to reproduce the EDZ behaviour. Modelling shear banding around the gallery is an important aspect that leads to a better description of the EDZ for the considered claystone. Moreover, considering the material viscosity allows a better reproduction of the gallery convergence in the long term.

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Hydrologic issues associated with nuclear waste repositories

2015

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Significant progress in hydrology, especially in subsurface flow and solute transport, has been made over the last 35 years because of sustained interest in underground nuclear waste repositories. The present paper provides an overview of the key hydrologic issues involved, and to highlight advances in their understanding and treatment because of these efforts. The focus is not on the development of radioactive waste repositories and their safety assessment, but instead on the advances in hydrologic science that have emerged from such studies. Work and results associated with three rock types, which are being considered to host the repositories, are reviewed, with a different emphasis for each rock type. The first rock type is fractured crystalline rock, for which the discussion will be mainly on flow and transport in saturated fractured rock. The second rock type is unsaturated tuff, for which the emphasis will be on flow from the shallow subsurface through the unsaturated zone to the repository. The third rock type is clay-rich formations, whose permeability is very low in an undisturbed state. In this case, the emphasis will be on hydrologic issues that arise from mechanical and thermal disturbances; i.e., on the relevant coupled thermo-hydromechanical processes. The extensive research results, especially those from multiyear large-scale underground research laboratory investigations, represent a rich body of information and data that can form the basis for further development in the related areas of hydrologic research. General IntroductionSignificant progress in hydrology, especially in subsurface flow and solute transport, has been made over the last 35 years because of sustained interest in the performance assessment of proposed underground nuclear waste repositories. The present paper attempts to provide an overview of the key hydrologic issues involved and to highlight the advances in their understanding and treatment because of these efforts. This paper is not focused on the development of high-level nuclear waste repositories and their safety assessment; it focuses instead on the advances in hydrologic science which have emerged from such studies. These advances may find applications in other hydrology-related problems of current importance at the national and international levels, such as environmental contamination remediation, carbon dioxide geosequestration, and natural gas production through fracking.In the next section, we present, in a general way, the context for the hydrologic framework related to performance and safety assessment of underground nuclear waste repositories that are proposed to be constructed in three particular rock formations-crystalline rock, unsaturated tuffs, and clays. Then, we discuss some particularly challenging factors concerning the research common to these three formations. This discussion will be followed by three sections devoted to each of these three rock types, respectively, to present a review of hydrologic research in these areas.

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Short- and long-term behaviors of drifts in the Callovo-Oxfordian claystone at the Meuse/Haute-Marne Underground Research Laboratory

Cited by 129 publications

References 6 publications

Generic Argillite/Shale Disposal Reference Case

Generic Argillite/Shale Disposal Reference Case

Modelling the influence of strain localisation and viscosity on the behaviour of underground drifts drilled in claystone

Hydrologic issues associated with nuclear waste repositories

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