Round robin testing of thermal conductivity reference materials
The Basalt Waste Isolation Project (BWIP), operated by Rockwell Hanford Operations, has a need to determine the thermal properties of basalt in the region being considered for a nuclear waste repository in basalt. Experimental data on thermal conductivity and its variation with temperature are information required for the characterization of basalt. To establish thermal conductivity values for the reference materials, an interlaboratory measurements program was undertaken. The program was planned to meet the objectives of performing an experimental characterization of the new stock and providing a detailed analysis of the results such that reference values of thermal conductivity could be determined. This program of measurements of the thermal conductivity of Pyrex 7740 and Pyroceram 9606 has produced recommended values that are within /sup + -/1% of those accepted previously. These measurements together with those of density indicate that the present lots of material are similar to those previously available. Pyrex 7740 and Pyroceram 9606 can continue to be used with confidence as thermal conductivity reference materials for studies on rocks and minerals and other materials of similar thermal conductivity. The uncertainty range for Pyrex 7740 and Pyroceram 9606 up to 300/sup 0/C is /sup + -/10.3% and /sup + -/5.6%, respectively. This range is similar to that indicated for the previously recommended values proposed some 18 years ago. It would appear that the overall state of the art in thermal conductivity measurements for materials in this range has changed little in the intervening years. The above uncertainties, which would have been greater had not three data sets been eliminated, are greater than those which are normally claimed for each individual method. Analyses of these differences through refinements in techniques and additional measurements to higher temperatures are required. 13 refs., 7 figs., 4 tabs.
- Research Organization:
- Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations; Dynatech R/D Co., Cambridge, MA (USA)
- DOE Contract Number:
- AC06-77RL01030
- OSTI ID:
- 6584715
- Report Number(s):
- RHO-BW-SA-492-P; CONF-851021-2; ON: DE87007394; TRN: 87-018462
- Resource Relation:
- Conference: 19. international thermal conductivity conference, Cookeville, TN, USA, 20 Oct 1985; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CALIBRATION STANDARDS
INTERLABORATORY COMPARISONS
THERMAL CONDUCTIVITY
PYREX
BASALT
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE DISPOSAL
BOROSILICATE GLASS
GLASS
IGNEOUS ROCKS
MANAGEMENT
MATERIALS
PHYSICAL PROPERTIES
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
ROCKS
STANDARDS
THERMODYNAMIC PROPERTIES
VOLCANIC ROCKS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
360603* - Materials- Properties
052002 - Nuclear Fuels- Waste Disposal & Storage