Measurement of the Density and Compressibility of (U, Pu)-Mixed Oxide at 3432 KJ/Kg (7356 K)

摘要

In a transient in-pile heating test the density of liquid (U, Pu)-mixed oxide at 3432+-103 kJ/kg was measured to be 5027+-132 kg/m/sup 3/. The corresponding temperature is estimated to 7356+-212 K. The isothermal compressibility of the mixed oxide was evaluated to 2.85 (+-1.65) x 10/sup -4//MPa at the same temperature. Based on these new data and previously existing measurements, new relations are proposed for the following properties of liquid UO/sub 2/ and (U, Pu)O/sub 2/, as well: density - enthalpy, density - temperature, thermal expansion - temperature, and isothermal compressibility - temperature. (ERA citation 14:017752)