Thermal conductivity and diffusivity of Permian Basin bedded salt at elevated pressure and temperature
Measurements of thermal conductivity and diffusivity were made on five core samples of bedded rock salt from the Permian Basin in Texas to determine its suitability as an underground nuclear waste repository. The sample size was 100 mm in diameter by 250 mm in length. Measurements were conducted under confining pressures ranging from 3.8 to 31.0 MPa and temperatures from room temperature to 473 K. Conductivity showed no dependence on confining pressure but evidenced a monotonic, negative temperature dependence. Four of the five samples showed conductivities clustered in a range of 5.6 +- 0.5 W/m.K at room temperature, falling to 3.6 +- 0.3 W/m.K at 473 K. These values are approximately 20% below those for pure halite, reflecting perhaps the 5 to 20%-nonhalite component of the samples. Diffusivity also showed a monotonic, negative temperature dependence, with four of the five samples clustered in a range of 2.7 +- 0.4 x 10/sup -6/ m/sup 2//s at room temperature, and 1.5 +- 0.3 x 10/sup -6/ m/sup 2//s at 473 K, all roughly 33% below the values for pure halite. One sample showed an unusually high conductivity (it also had the highest diffusivity), about 20% higher than the others; and one sample showed an unusually low diffusivity (it also had the lowest conductivity), roughly a factor of 2 lower than the others. 27 references, 8 figures, 4 tables.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6624386
- Report Number(s):
- UCRL-53476; ON: DE84015922
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Thermal properties of Permian Basin evaporites to 493 K and 30 MPa confining pressure
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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
SALT DEPOSITS
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
ERRORS
EXPERIMENTAL DATA
HIGH TEMPERATURE
HIGH-LEVEL RADIOACTIVE WASTES
MEDIUM TEMPERATURE
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TEXAS
DATA
FEDERAL REGION VI
GEOLOGIC DEPOSITS
INFORMATION
MATERIALS
NORTH AMERICA
NUMERICAL DATA
PHYSICAL PROPERTIES
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
THERMODYNAMIC PROPERTIES
USA
WASTES
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)
052002 - Nuclear Fuels- Waste Disposal & Storage