Thermal conductivity of the rocks in the Bureau of Mines Standard Rock Suite
Abstract
Thermal conductivities of eight rocks from the Bureau of Mines Standard Rock Suite were measured in air over the temperature range 373 to 533/sup 0/K (100 to 260/sup 0/C). The thermal conductivities of these rocks were measured to furnish standards for future comparisons with host rock from prospective nuclear waste repository sites. The thermal conductivity at a given temperature decreased by as much as 9% after a specimen had been heated to the maximum temperature (533/sup 0/K), but additional heating cycles had no further effect. This decrease was smallest in the igneous rocks and largest in the sedimentary types. Variations due to orientation were within the precision of measurements (+- 5%). In most cases the thermal conductivities were linear with the reciprocal of the temperature and were within 14% of published data obtained by other methods. Measurements were made by a cut-bar comparison method in which the sample was sandwiched between two reference or metering bars made of Pyroceram 9606 glass-ceramic. The apparatus consisted of a Dynatech Model TCFCM-N20 comparative thermal conductivity analyzer controlled by a Hewlett Packard Model 3052A data acquisition system. A program was written to increment and cycle the temperature in steps between predetermined initial and maximummore »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (USA)
- OSTI Identifier:
- 5608708
- Report Number(s):
- ORNL/TM-7052
TRN: 80-004780
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; BASALT; THERMAL CONDUCTIVITY; GRANITES; GRANODIORITES; LIMESTONE; QUARTZITES; SANDSTONES; EXPERIMENTAL DATA; GRAPHS; HEAT TRANSFER; HIGH TEMPERATURE; MEDIUM TEMPERATURE; PYROMETERS; RADIOACTIVE WASTE FACILITIES; ROCKS; STANDARDS; TABLES; US BUREAU OF MINES; CARBONATE ROCKS; DATA; DATA FORMS; ENERGY TRANSFER; IGNEOUS ROCKS; INFORMATION; MEASURING INSTRUMENTS; METAMORPHIC ROCKS; NATIONAL ORGANIZATIONS; NUCLEAR FACILITIES; NUMERICAL DATA; PHYSICAL PROPERTIES; RESERVOIR ROCK; SEDIMENTARY ROCKS; THERMODYNAMIC PROPERTIES; US ORGANIZATIONS; 580300* - Mineralogy, Petrology, & Rock Mechanics- (-1989); 052002 - Nuclear Fuels- Waste Disposal & Storage
Citation Formats
Morgan, M.T., and West, G.A. Thermal conductivity of the rocks in the Bureau of Mines Standard Rock Suite. United States: N. p., 1980.
Web. doi:10.2172/5608708.
Morgan, M.T., & West, G.A. Thermal conductivity of the rocks in the Bureau of Mines Standard Rock Suite. United States. doi:10.2172/5608708.
Morgan, M.T., and West, G.A. Tue .
"Thermal conductivity of the rocks in the Bureau of Mines Standard Rock Suite". United States.
doi:10.2172/5608708. https://www.osti.gov/servlets/purl/5608708.
@article{osti_5608708,
title = {Thermal conductivity of the rocks in the Bureau of Mines Standard Rock Suite},
author = {Morgan, M.T. and West, G.A.},
abstractNote = {Thermal conductivities of eight rocks from the Bureau of Mines Standard Rock Suite were measured in air over the temperature range 373 to 533/sup 0/K (100 to 260/sup 0/C). The thermal conductivities of these rocks were measured to furnish standards for future comparisons with host rock from prospective nuclear waste repository sites. The thermal conductivity at a given temperature decreased by as much as 9% after a specimen had been heated to the maximum temperature (533/sup 0/K), but additional heating cycles had no further effect. This decrease was smallest in the igneous rocks and largest in the sedimentary types. Variations due to orientation were within the precision of measurements (+- 5%). In most cases the thermal conductivities were linear with the reciprocal of the temperature and were within 14% of published data obtained by other methods. Measurements were made by a cut-bar comparison method in which the sample was sandwiched between two reference or metering bars made of Pyroceram 9606 glass-ceramic. The apparatus consisted of a Dynatech Model TCFCM-N20 comparative thermal conductivity analyzer controlled by a Hewlett Packard Model 3052A data acquisition system. A program was written to increment and cycle the temperature in steps between predetermined initial and maximum values. At each step the thermal conductivity was measured after steady-state conditions were established. The rocks furnished by the Bureau of Mines were quarried in large and fairly homogeneous lots for use by researchers at various laboratories. To investigate any anisotropy, cores were taken from each rock cube perpendicular to each of the cube faces. Samples 2 in. in diameter and approx. 0.75 in. thick were prepared from the cores and were dried in a vacuum oven for at least one month prior to taking measurements.},
doi = {10.2172/5608708},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}
-
Modification of Bureau of Mines BERC rock dust meter. Report of investigations, 1976
The Bureau of Mines has improved a mine dust incombustibles analyzer originally developed at the Bartlesville Energy Research Center (BERC). This analyzer provides quick, accurate analysis of the percentage of incombustible material present in dust samples taken from mine ribs, roof, and floor so that costly overdusting may be eliminated while still maintaining a proper level of incombustibles. The changes being effected on the present design of the BERC model IV rock dust analyzer should simplify its operation and calibration procedures, resulting in increased accuracy. (GRA) -
United States Bureau of Mines standard for inspection and test of explosion-proof enclosures for mining equipment
Features that must be considered in constructing explosion-proof enclosures used on electrical mining equipment for operation in gassy coal mines are discussed along with how Bureau tests electrical equipment for permissibility, describing apparatus used.