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Title: Report on Modeling Coupled Processes in the Near Field of a Clay Repository

Abstract

Clay/shale has been considered as potential host rock for geological disposal of high-level radioactive waste throughout the world. Coupled thermal, hydrological, mechanical, and chemical (THMC) processes have a significant impact on the long-term safety of a clay repository. For example, the excavation damaged zone (EDZ) near repository tunnels can modify local permeability (resulting from induced fractures), potentially leading to less confinement capability. This report documents results from three R&D activities: (1) implementation and validation of constitutive relationships, (2) development of a discrete fracture network (DFN) model for investigating coupled processes in the EDZ, and (3) development of a THM model for the FE tests at Mont Terri, Switzerland, for the purpose of model validation. The overall objective of these activities is to provide an improved understanding of EDZ evolution in clay repositories and the associated coupled processes, and to develop advanced relevant modeling capabilities.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1173162
Report Number(s):
LBNL-6021E
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES

Citation Formats

Liu, Hui -Hai, Houseworth, Jim, Rutqvist, Jonny, Li, Lianchong, Asahina, Daisuke, Chen, Fei, and Birkholzer, Jens. Report on Modeling Coupled Processes in the Near Field of a Clay Repository. United States: N. p., 2012. Web. doi:10.2172/1173162.
Liu, Hui -Hai, Houseworth, Jim, Rutqvist, Jonny, Li, Lianchong, Asahina, Daisuke, Chen, Fei, & Birkholzer, Jens. Report on Modeling Coupled Processes in the Near Field of a Clay Repository. United States. https://doi.org/10.2172/1173162
Liu, Hui -Hai, Houseworth, Jim, Rutqvist, Jonny, Li, Lianchong, Asahina, Daisuke, Chen, Fei, and Birkholzer, Jens. 2012. "Report on Modeling Coupled Processes in the Near Field of a Clay Repository". United States. https://doi.org/10.2172/1173162. https://www.osti.gov/servlets/purl/1173162.
@article{osti_1173162,
title = {Report on Modeling Coupled Processes in the Near Field of a Clay Repository},
author = {Liu, Hui -Hai and Houseworth, Jim and Rutqvist, Jonny and Li, Lianchong and Asahina, Daisuke and Chen, Fei and Birkholzer, Jens},
abstractNote = {Clay/shale has been considered as potential host rock for geological disposal of high-level radioactive waste throughout the world. Coupled thermal, hydrological, mechanical, and chemical (THMC) processes have a significant impact on the long-term safety of a clay repository. For example, the excavation damaged zone (EDZ) near repository tunnels can modify local permeability (resulting from induced fractures), potentially leading to less confinement capability. This report documents results from three R&D activities: (1) implementation and validation of constitutive relationships, (2) development of a discrete fracture network (DFN) model for investigating coupled processes in the EDZ, and (3) development of a THM model for the FE tests at Mont Terri, Switzerland, for the purpose of model validation. The overall objective of these activities is to provide an improved understanding of EDZ evolution in clay repositories and the associated coupled processes, and to develop advanced relevant modeling capabilities.},
doi = {10.2172/1173162},
url = {https://www.osti.gov/biblio/1173162}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {8}
}