Summary of Near-Surface Test Facility results and their application to repository design
Results from ongoing and newly initiated tests at the Near-Surface Test Facility have contributed substantially to the store of knowledge of rock mass characterization of basalt at a variety of temperatures. Enhancements in monitoring instrumentation and testing techniques have likewise been achieved. These developments have already assisted in the determination of site suitability of Hanford basalt formations and have contributed to refinement of predictive numerical models for use in repository design. Most recently, the testing program has resulted in the following: an improved method of determining thermal expansion effects on the borehole deformation gage; an improved method of monitoring the stress relief process during the doorstopper overcoring process; the development of a high-resolution optical device for monitoring rock mass deformation in several directions simultaneously; a preliminary indication that the columnar structure of basalt is reflected by significant differences in deformational characteristics parallel and perpendicular to the columns; initial values of block test deformation modulus to establish a relationship between small- and large-scale modulus test results; and the observation that slabbing and decrepitation of borehole walls do not occur in basalt even at temperatures that are twice the design value (i.e., at 400/sup 0/C). 5 figures.
- Research Organization:
- Rockwell International Corp., Richland, WA (USA). Energy Systems Group
- DOE Contract Number:
- AC06-77RL01030
- OSTI ID:
- 7014411
- Report Number(s):
- RHO-BW-SA-256-P; CONF-821205-20; ON: DE83001755
- Country of Publication:
- United States
- Language:
- English
Similar Records
An assessment of the suitability of five overcoring techniques for stress determination in a jointed basalt
Rock mass deformation properties of closely jointed basalt
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
BASALT
BOREHOLES
CAVITIES
DATA
DEFORMATION
DESIGN
EXPERIMENTAL DATA
HANFORD RESERVATION
HEATERS
HEATING
HIGH-LEVEL RADIOACTIVE WASTES
IGNEOUS ROCKS
INFORMATION
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
NUMERICAL DATA
PRESSURE DEPENDENCE
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTES
ROCKS
SITE SELECTION
STRESSES
TEMPERATURE EFFECTS
TEST FACILITIES
THERMAL STRESSES
UNDERGROUND DISPOSAL
US DOE
US ERDA
US ORGANIZATIONS
VOLCANIC ROCKS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES