Multiple-code benchmark simulation study of coupled thmc processes in the excavation disturbed zone associated with geological nuclear waste repositories
Jonny Rutqvist,X‐T Feng,John A. Hudson,Lanru Jing,Akira Kobayashi,Tomofumi Koyama,P‐Z Pan,H-S. Lee,M. Rinne,Eric Sonnenthal,Yuji Yamamoto +10 more
TL;DR: An international, multiple-code benchmark test (BMT) study is being conducted within the international DECOVALEX project to analyse coupled thermal, hydrological, mechanical and chemical processes in the excavation disturbed zone (EDZ) around emplacement drifts of a nuclear waste repository.
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Abstract: An international, multiple-code benchmark test (BMT) study is being conducted within the international DECOVALEX project to analyse coupled thermal, hydrological, mechanical and chemical (THMC) processes in the excavation disturbed zone (EDZ) around emplacement drifts of a nuclear waste repository. This BMT focuses on mechanical responses and long-term chemo-mechanical effects that may lead to changes in mechanical and hydrological properties in the EDZ. This includes time-de-pendent processes such as creep, and subcritical crack, or healing of fractures that might cause weakening or hardening of the rock over the long term. Five research teams are studying this BMT using a wide range of model approaches, including boundary element, finite element, and finite difference, particle mechanics, and elasto-plastic cellular automata methods. This paper describes the definition of the problem and preliminary simulation results for the initial model inception part, in which time dependent effects are not yet included.
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Citations
A multiple-code simulation study of the long-term EDZ evolution of geological nuclear waste repositories
Jonny Rutqvist,Ann Bäckström,Masakazu Chijimatsu,Xia-Ting Feng,Peng-Zhi Pan,John A. Hudson,Lanru Jing,Akira Kobayashi,Tomofumi Koyama,Hee-Suk Lee,Xiao-Hua Huang,Mikael Rinne,Baotang Shen +12 more
TL;DR: In this paper, a simulation study shows how widely different model approaches can be adapted to model the evolution of the excavation disturbed zone (EDZ) around a heated nuclear waste emplacement drift in fractured rock.
Coupled THM processes in EDZ of crystalline rocks using an elasto-plastic cellular automaton
TL;DR: In this paper, a numerical study of coupled thermal, hydrological and mechanical processes in the excavation disturbed zones (EDZ) around nuclear waste emplacement drifts in fractured crystalline rocks is presented.
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Development and applications of the elasto-plastic cellular automaton
TL;DR: The elasto-plastic cellular automaton (EPCA) as mentioned in this paper is a simulator for rock mechanics and rock engineering, which is a down-top way of dealing with nonlinear behaviors of rocks.
30
Thermophysical and Mechanical Properties of Granite and Its Effects on Borehole Stability in High Temperature and Three-Dimensional Stress
TL;DR: In this article, a series of experiments were conducted to discuss the compressional wave velocity, triaxial strength, and permeability of granite cored from 3500 meters borehole under high temperature and three-dimensional stress.
References
•Journal Article
Comparative simulation study of coupled THM processes near back-filled and open-drift nuclear waste repositories in Task D of the International DECOVALEX Project
Jonny Rutqvist,Jens Birkholzer,Masakazu Chijimatsu,Olaf Kolditz,Quansheng Liu,Y. Oda,Wenqing Wang,Chengyuan Zhang +7 more
TL;DR: In this article, four research teams used five different models to simulate coupled thermal, hydrological, and mechanical processes near underground waste emplacement drifts, under higher and lower post-closure temperature, respectively.
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