Evaluation of rock joint models and computer code UDEC against experimental results

Technical Report · Tue Nov 01 04:00:00 EST 1994

OSTI ID:10194952

Hsiung, S M; Ghosh, A; Chowdhury, A H; Ahola, M P ^[1]

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1. Southwest Research Institute, San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

The Mohr-Coulomb, Barton-Bandis, and Continuously-Yielding, rock joint models and their numerical implementation in the UDEC code were evaluated for their ability to simulate joint behavior under cyclic pseudostatic and dynamic loading conditions. Some deficiencies, of these joint models and their implementation in UDEC were identified. These deficiencies include that the rock joint models under evaluation may not be able to sufficiently predict the joint shear and dilation behavior during reverse joint shearing. Both joint forward and reverse shearing are important phenomena of a rock joint behavior. Reverse shearing can result from earthquakes, thermal load, or both - all of which are expected to be experienced during the life of a high-level waste repository. These deficiencies could result in an overestimation of the stability of emplacement drifts and emplacement boreholes and prediction of incorrect near-field flow pattern (including preferential pathways for water and gas).

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses
• Sponsoring Organization: Nuclear Regulatory Commission, Washington, DC (United States)
• OSTI ID: 10194952
• Report Number(s): NUREG/CR--6216; CNWRA--93-024; ON: TI95003196
• Country of Publication: United States
• Language: English

Related Subjects

052002
053001
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
580000
COMPUTERIZED SIMULATION
CRACKS
FRACTURE MECHANICS
GEOLOGIC FISSURES
GEOLOGIC FRACTURES
GEOSCIENCES
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE STORAGE
ROCKS
SITE CHARACTERIZATION
SITING
UNDERGROUND STORAGE
WASTE DISPOSAL AND STORAGE