Thermal Diffusivity and Thermal Expansion of Some Rock Types in Relation to Storage of Nuclear Waste
Thermal diffusivities between 25 and 600°C and thermal expansions between 25 and 500°C were determined for nine rocks from three plutons. These igneous rocks were obtained from the surfaces of the three rock masses. The thermal diffusivities of the nine specimens varied considerably and were found to decrease at different rates with increasing temperature. It was established that at 500°C, the thermal expansion of the specimens varied by a factor of 2.5. An empirical relation was used to determine the high-temperature piercing rate as a possible indicator for the spallability of these rocks exposed to low-temperature heat loads.
KeywordsThermal Expansion Rock Mass Thermal Diffusivity Nuclear Waste Rock Specimen
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