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DECOVALEX-2023: Task G, SAFENET Final Report

Technical Report ·
DOI:https://doi.org/10.2172/2481317· OSTI ID:2481317
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  1. Technische Universität Dresden (Germany). Helmholtz Centre for Environmental Research
  2. Univ. of Edinburgh, Scotland (United Kingdom)
  3. DynaFrax, Potsdam (Germany)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Canadian Nuclear Safety Commission (CNSC), Ottawa, ON (Canada)
  6. Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)
  7. Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon (Korea, Republic of)
  8. Korea Institute of Civil Engineering and Building Technology (KICT), Goyang-si (Korea, Republic of)
  9. Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
  10. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  11. Quintessa Ltd., Warrington (United Kingdom); Univ. of Edinburgh, Scotland (United Kingdom)
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DECOVALEX Task G deals with fracture mechanics at several scales using a combined approach of experimental work, related model development, benchmarking and experimental analysis. Fig. 0.1 provides a graphical abstract for Task G. The experimental basis for the related mechanical (M), hydro-mechanical (HM), and thermo-mechanical (TM) processes comes from the rock mechanics laboratories of Universities of Freiberg (TUBAF) and Edinburgh, as well as the Korea Institute of Civil Engineering and Building Technology (KICT). The experimental work in the rock laboratories is closely linked to the underground research laboratories (URLs) Reiche Zeche (Germany), KURT (Korea), and Mont Terri (Switzerland). The scientific key questions are related to fracture permeability evolution under THM conditions, anisotropy effects on fracturing processes, and thermal fracture slip, which are being addressed in specific steps of the task. A large variety of numerical methods have been developed and applied for experimental analysis, ranging from continuum to discontinuum approaches. A detailed comparison of mechanical and hydro-mechanical processes is given in the section 3 via the benchmarking exercises. As a result of DECOVALEX-2023 Task G we further improved our understanding and predictability of fracturing processes under THM conditions. This was based on robust numerical simulation methods and in-depth experimental analysis.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); National Natural Science Foundation of China
DOE Contract Number:
AC02-05CH11231
OSTI ID:
2481317
Report Number(s):
LBNL--2001628
Country of Publication:
United States
Language:
English

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