... ABSTRACT Shale is considered a suitable host rock for geological nuclear waste repositories due to its low permeability and tendency to reduce stress concentrations via creep. However, such a claim has not been carefully examined from the perspective of shale anisotropy caused by its bedding...

... ABSTRACT Buffer materials are critical for engineered barrier systems (EBS) to handle high-level radioactive waste (HLW) in geological repositories. The water content and volume change of the buffer block during storage and installation are affected by environmental conditions...

... for large time scales (Krauskopf, 1988). fluid dynamics compaction permeability reservoir characterization reservoir geomechanics repository ghareb formation solid waste management disposal deformation moduli nuclear waste disposal journal elastic moduli experiment loading poisson...

... ABSTRACT: Thermal and hydrological behaviors of multiphase pore fluids in the presence of heat cause the near-field thermo-hydro-mechanical-chemical (THMC) coupled processes that can influence performance of geologic radioactive waste repositories. This hydro-thermal impacts may perturb...

... ABSTRACT: During the long service period of nuclear waste repositories, large earthquakes may occur around the repository site and coseismically trigger the shear displacement of secondary fractures intersected with waste canisters. The induced irreversible shear of natural fractures may...

... ABSTRACT: This study investigates the effect of shale creep on the stress evolution of a generic nuclear waste repository. Thermo-hydromechanically (THM) coupled simulations were carried out with the TOUGH-FLAC simulator to model temperature/pore pressure/stress changes due to the decay...

... assumption dsd morena repository elastic stiffness transformation nachtsheim posiva geological repository microstructural recommendation ARMA 22 699 Sensitivity analysis of the dry density distribution of a bentonite buffer in a deep geological repository for spent nuclear fuel Gharbieh, H...

.... However, the amount of decay heat released by large canisters may cause high temperature in the backfill surrounding the canisters and in the host rock. This results in pressure and stress changes that may affect the long-term repository performance. To analyze it, the TOUGH-FLAC simulator is used...

... ABSTRACT: Bentonite buffer in the geological repository for high-level radioactive waste undergoes the heating from the waste package and hydration from the geological formation and goes through coupled thermo-hydro-mechanical-chemical (THMC) changes over the life span of a repository...

... Abstract The disposal of heat-emanating radioactive waste in deep repositories can induce strongly coupled Thermal (T), hydrological (H), mechanical (M) and chemical (C) processes. Adequate coupled THMC models are important for the safety assessment of such a repository. Here we present...

... of relatively high-porosity (20-45%) chalks, marls, and oil shales with kerogen. This paper describes preliminary measurements, analyses of thermal hydrological mechanical (THM) properties and expected borehole stability for a potential high level nuclear waste borehole repository in Israel. This effort is part...

... Reservoir Characterization wellbore integrity modeling calculation Wellbore Design vertical borehole disposal option salt pillow long-term barrier integrity repository Upstream Oil & Gas reservoir geomechanics criterion solid waste management salt barrier fluid pressure...

... ABSTRACT: The Nuclear Waste Management Organization (NWMO) is implementing Adaptive Phased Management (APM) for the long-term management of Canada's used nuclear fuel. APM includes centralized containment and isolation of the used fuel in a deep geological repository in a suitable host rock...

... dynamic property sandstone quality factor repository Rock Mech 1. INTRODUCTION Sedimentary rocks like sandstone are generally brittle, and anisotropic with respect to bedding. Being layered media, they seldom exhibit linear elasticity like man- made materials, such as steel (strains are not 100...

... critical porosity power law repository flow in porous media exponent Slip Effect national laboratory granular salt gas permeability permeability viscosity change deformation 1. INTRODUCTION Granular (or crushed) salt is being considered as a seal material for shafts, drifts, and boreholes...

... ABSTRACT: The potential of inducing fault reactivation by a synthetic nuclear waste repository in a clay-stone formation is here investigated. The target clay formation may be expected to be almost impermeable, having self-healing and long-term plastic properties, to make sure the canisters...

... ABSTRACT: In order to understand and to predict the response of EBS, we simulate a clay-rock repository case considering chemo-mechanical coupling, in which chemical changes affect the mechanical behavior of the bentonite through the evolution of volume fraction of smectite, exchangeable...

... Abstract: Rock salt provides the world's best barrier, and has thus long been considered as a host rock for nuclear waste repositories. Salt domes have vertical extensions of several kilometres and are consequently well-suited for deep borehole disposal, as an alternative to a mined...

... Abstract With an abundance of scientific information in hand, what are the remaining geomechanics issues for a salt repository for heat-generating nuclear waste disposal? The context of this question pertains to the development of a license application, rather than an exploration...

..., such as high-level waste or spent nuclear fuel. With the aim of performing generic research that will support future site-specific work [9], we consider a generic salt repository and we assume in-drift emplacement of the waste packages parallel to the drift axis. After emplacement of the waste packages...