Thermal Conductivity of PuO2 as Determined from Thermal Diffusivity Measurements
- 1 January 1968
- journal article
- research article
- Published by Taylor & Francis in Nuclear Applications
- Vol. 4 (1) , 54-61
- https://doi.org/10.13182/nt68-a26353
Abstract
The thermal conductivity of PuO2 as determined by thermal diffusivity measurements is presented for the temperature range 250 to ≍1200°C. Specimens of PuO2 with confirmed stoichiometry were fabricated by hot isostatic pressing of powder to densities of 96.5 and 81.9% of theoretical. The thermal diffusivity of four specimens, two of each density, was measured by the heat pulse technique using a laser as the heat source. The data indicated that the thermal conductivity of PuO2 is lower than that of UO2, and decreases with increasing temperature from 250 to 1000°C in an approximate 1/T relation. Values range from 0.06 W/(cm deg C) at 300°C to 0.025 W/(cm deg C) at 1200°C. An apparent reduction of the PuO2 was observed at temperatures above 1200°C.Keywords
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