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Shear wave experiments at the US site at the Grimsel laboratory [electronic resource]

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Bibliographic Details
Online Access: Online Access
Corporate Authors: Lawrence Berkeley Laboratory (Researcher), Lawrence Berkeley National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Washington, D.C : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1990.
Subjects:
Seismic Surveys.
Us Doe.
Nuclear Facilities.
Rocks.
Alps.
National Organizations.
Seismic P Waves.
Geologic Structures.
Processing.
Diagnostic Techniques.
Seismic Detection.
Switzerland.
Igneous Rocks.
Saturation.
Tunnels.
Research Programs.
Europe.
Seismic Waves.
Storage.
Management.
Radioactive Waste Facilities.
Wave Propagation.
Mountains.
Granites.
Us Organizations.
Seismic S Waves.
Coordinated Research Programs.
Hydrology.
Geophysical Surveys.
Boreholes.
Underground Storage.
Underground Facilities.
Surveys.
Radioactive Waste Storage.
Plutonic Rocks.
Geologic Fractures.
Waste Storage.
Waste Management.
Data Processing.
Site Characterization.
Detection.
Cavities.
Tomography.
Western Europe.
Management Of Radioactive And Non-radioactive Wastes From Nuclear Facilities.
Description
Abstract:As part of the United States Department of Energy (USDOE) cooperative project with the National Cooperative for the Storage of Radioactive Waste (Nagra) of Switzerland, there have been a series of studies carried out at the Nagra underground test facility at Grimsel. The Grimsel test facility is several 3.5 meter diameter tunnels excavated with a tunnel boring machine in the southern Swiss Alps. The rock type is granitic, although there is a large variation in the granitic fabric throughout the facility. The work described here was the first phase of a multiyear project to evaluate and develop seismic imaging techniques for fracture detection and characterization for the use in siting underground nuclear waste facilities. Data from a crosshole tomographic survey in the Underground Seismic (US) site at the Nagra Grimsel test facility in Switzerland and successfully reprocessed to enhance the S-wave arrivals. The results indicate that in a saturated granite Vp/Vs ratios approach 2.0 in the fractured rock. These results indicate that S-wave data would be very useful for fracture detection, especially in detecting thinner fractures.
Item Description:Published through the Information Bridge: DOE Scientific and Technical Information.
07/01/1990.
"lbl-28808"
" ndc--7"
"DE91004134"
Peterson, J.E. Jr.; Majer, E.L.; Sattel, G.; Bluemling, P.
Nationale Genossenschaft fuer die Lagerung Radioaktiver Abfaelle (NAGRA), Baden (Switzerland)
NAGRA.
Physical Description:Pages: (13 p) : digital, PDF file.

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