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High-temperature ex-reactor thermal conductivity of thoria and thoria-urania solid solutions (LWBR/AWBA Development Program)

Technical Report ·
OSTI ID:6811836
Thermal conductivity of a material can be determined by the product of thermal diffusivity, hheat capacity, and density. Each of these properties is reviewed for ThO/sub 2/ and for ThO/sub 2/-UO/sub 2/ solid solutions, and compared with similar data for UO/sub 2/. ThO/sub 2/-UO/sub 2/ solid solutions show evidence for phase transitions from enthalpy data and thus show increases in calculated heat capacities and thermal conductivities. The pretransition thermal conductivities of the TO/sub 2/-UO/sub 2/ solid solutions are intermediate between thoria and urania. Experimentally determined pretransition heat capacities for the solid solutions agree with values calculated from mole averages of ThO/sub 2/ and UO/sub 2/.
Research Organization:
Bettis Atomic Power Lab., West Mifflin, PA (USA)
DOE Contract Number:
AC11-76PN00014
OSTI ID:
6811836
Report Number(s):
WAPD-TM-1530; ON: DE83006715
Country of Publication:
United States
Language:
English