Measurement of Thermal Conductivity of (U_(0.68)Pu_(0.3)Am_(0.02))O_(2-x) in High temperature region

摘要

Thermal diffusivities of (U_(0.68)Pu_(0.3)Am_(0.02))O_(2-x) with O/M ratios of 1.91-2.00 were measured up to 2200 K and thermal conductivities were evaluated as functions of temperature and O/M ratio. Thermal conductivities of (U_(0.68)Pu_(0.3)Am_(0.02))O_(2.00) were different for heating and cooling processes beyond 1800 K. The change was found to be caused by a significant reduction of the specimen during the measurement.