Numerical Simulations of Radionuclide Transport through Clay and Confining Units in a Geological Repository using COMSOL
J. Hansmann, M. L. Sentis, B. J. Graupner, A.-K. Leuz, C. Belardinelli
Swiss Federal Nuclear Safety Inspectorate (ENSI), Brugg, Switzerland
Kantonsschule Solothurn, Solothurn, Switzerland
Introduction: The sectoral plan that defines the procedure and criteria of site selection for deep geological repositories for all categories of waste (high-level and low- and intermediate-level waste) in Switzerland started in 2008 and will last for about ten years. ENSI (Swiss Nuclear Safety Inspectorate) is in charge of reviewing the proposals and safety assessments for geological ...
M. Liu, and G. Zhao
University of Regina
Petroleum reservoir simulation is a process of modeling the complex physical phenomena inside a reservoir. This study presents an application of an analytical based numerical scheme so called the Boundary Element Method (DRBEM). It is proven to be able to provide a computationally efficient means of handling single and multiphase flow in a homogeneous medium through the comparison study with ...
L.M. de Vries, A. Nardi, A.E. Idiart, P. Trinchero, J. Molinero, F. Vahlund, H. von Schenck
Amphos 21, Barcelona, Spain
Swedish Nuclear Fuel and Waste Management, Stockholm, Sweden
The Swedish Nuclear Fuel and Waste Management Co (SKB) is responsible for final disposal of spent fuel and radioactive waste. SKB operates SFR, an underground waste repository in crystalline rock. The evolution of groundwater flow within the repository needs to be estimated considering different options for the design of the engineered barriers. The goal is to predict the effects of flow and ...
VTT, Technical Research Centre of Finland, Espoo, Finland
Radionuclide transport modeling is a part of the research concerning geological disposal of spent nuclear fuel. Typically, the transport models near a single deposition hole focus on the reactions of nuclides, while the model geometry and the flow of groundwater are often simplified. In this paper, instead, a radionuclide transport model in a detailed 3D geometry with no reactions is introduced. ...
S. Palma , R. Castro , A. Hekmat ,
 Mining Engineering Department, Block Caving Laboratory, University of Chile, Santiago, Chile
The block caving mine is considered by the mining industry as one of the natural replacements of the current open cut mines in the near future. The block caving technique is based on the extraction of small broken rocks, created by blasted initially large solid rocks, and the fracture of compact material located in the upper layers because the stress propagation generated by the extraction ...
D. La Marra, A. Manconi, and M. Battaglia
Dept of Earth Sciences, University of Rome “La Sapienza”, Roma, Italy
IRPI-CNR, Strada delle Cacce, Torino, Italy
This study investigates the feedback between fault slip and dike intrusions during the Mono-Inyo eruption sequence of ~1350 A.D. (Mono Basin, California). We perform an extensive validation of 3D finite element models, implemented in the Structural Mechanics module of COMSOL Multiphysics, against standard analytical solutions of fault dislocation in a homogeneous elastic flat halfspace. The ...
Variation of the Frost Boundary below Road and Railway Embankments in Permafrost Regions in Response to Solar Irradiation and Winds
N.I. Kömle and W. Feng
Space Research Institute, Austrian Academy of Sciences, Graz, Austria
State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou, China
We present COMSOL solutions for a coupled gas flow and heat transfer problem, which occurs particularly when traffic pathways are constructed in high altitude and arctic regions, where the underground is frozen soil. To avoid melting of the frozen ground (which usually leads to mechanical instability) one has to find suitable measures to keep the subsurface soil and the embankment suitably cool. ...
S. Lazzari, E. Zanchini
DIENCA - University of Bologna, Bologna, Italy
A design method for BHE fields in the absence of groundwater flow is presented, based on the superposition of effects. The effects of any periodic heat load with a period of one year can be obtained by a weighted sum of the effects of a monthly unit step heat load, properly displaced in time. The interference among BHEs is evaluated by the superposition of effects in space. The result of the ...
P. Vincent, E. Humphreys
College of Earth, Ocean, & Atmospheric Sciences, Oregon State University, Corvallis, OR, USA
Department of Geological Sciences, University of Oregon, Eugene, OR, USA
Introduction: Lithospheric delamination beneath the western U.S. is believed to be the driving mechanism responsible for the evolution of magmatic and topographic features observed at the surface in the western U.S.. This process requires hot asthenosphere to be in contact with the underside of cold sub-crustal lithosphere and believed to be initiated by the Yellowstone hot spot plume that due ...
M. Quinn, D. Whitlow, O.D.S. Taylor, M.H. McKenna
 Engineer Resource and Development Center, United States Army Corps of Engineers, Vicksburg, MS, USA
Bridge piers and abutments makeup the bridge substructure and transmit loads from the superstructure to the bridge foundation material (Figure 1). The bridge abutment serves three purposes: to provide vertical support to the bridge superstructure where the bridge ends, to connect the bridge with the approach roadway, and to retain roadway base materials. There are several types of abutment ...