Assessment of crushed salt consolidation and fracture healing processes in a nuclear waste repository in salt

Technical Report · Thu Nov 01 04:00:00 EST 1984

OSTI ID:6190255

For a nuclear waste repository in salt, two aspects of salt behavior are expected to contribute to favorable conditions for waste isolation. First, consolidation of crushed salt backfill due to creep closure of the underground openings may result in a backfill barrier with low permeability. Second, fractures created in the salt by excavation may heal under the influence of stress and temperature following sealing. This report reviews the status of knowledge regarding crushed salt consolidation and fracture healing, provides analyses which predict the rates at which the processes will occur under repository conditions, and develops requirements for future study. Analyses of the rate at which crushed salt will consolidate are found to be uncertain because of unexplained wide variation in the creep properties of crushed salt obtained from laboratory testing, and because of uncertainties in predictions of long term closure rates of openings in salt. This uncertainty could be resolved to a large degree by additional laboratory testing of crushed salt. Similarly, additional testing of fracture healing processes is required to confirm that healing will be effective under repository conditions. Extensive references, 27 figures, 5 tables.

• Research Organization: IT Corp., Albuquerque, NM (USA)
• DOE Contract Number: AC02-83CH10140
• OSTI ID: 6190255
• Report Number(s): BMI/ONWI-546; ON: DE85006262
• Country of Publication: United States
• Language: English

Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
580300 -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
COMMINUTION
CREEP
CRUSHING
DATA
DEFORMATION
DENSITY
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
INFORMATION
MECHANICAL PROPERTIES
MOISTURE
NUMERICAL DATA
PERMEABILITY
PERMIAN BASIN
PHYSICAL PROPERTIES
SALT DEPOSITS