Chemical Engineering Division Reactor Safety and Physical Property Studies Semiannual Report, January--June 1972.

Abstract

2. Thermodynamic Functions of Na 2 0 3. Comparison of Observed Frequencies of Uranium,Oxides Isolated in Argon and Krypton Matrices 4. Normal Mode Analysis for Matrix-Isolated UO2 5. Calculated Pressures for Initial Fuel Composition (Uo.8 Pu 0.2^1.98 and Fuel Density of 5 g/cm3 6. Calculated Pressures for Initial Fuel Composition (UQ # 8 PU 0 2^1.95 and Fuel Density of 5 g/cnr 7. Calculated Pressures for Initial Fuel Composition (u o.85^u0.15^ Oi # 98 and Fuel Density of 5 g/cm^ 8. Calculated Pressures for Initial Fuel Composition (UQ^8^U0.2)OI.98 and Burnup of 1% 9. Calculated Pressures for Initial Fuel Composition (UQ^PUQ OO^gg and Burnup of 3% * .... 22 10. Calculated Pressures for Initial Fuel Composition (UQ,8^U0.2)^1.98 and Burnup of 5% 11. Calculated Pressures for Initial Fuel Composition (UQ # 8^U0.2)^1.98 and Burnup of 8% 12. Literature Values for Tungsten Thermal Diffusivity 13. Thermal Diffusivity and Conductivity of U0 2 at 1600°C 14. U0 2 Microspheres-Analysis and Description 15. Chemical Composition of Concrete and Basalt 33 16. Dissolution of U0 2 in Basalt at 2200°C 33

Computer codes used in the calculation of high-temperature thermodynamic properties of sodium

“…Equation (20) was integrated from Tjj, to 1644.26 K, and then this data was fit by the least squares method to obtain the entropy for saturated liquid sodium in the low-temperature region. This equation is S" = -5.90356 + 1.51103 In T -5.73462 X lO"'^ T + 1.57165 x lO"'' T^ (21) 3425.81 T^ Above 1644.26 K, the entropy was calculated at each temperature by adding to the liquid entropy the contribution of the integral in Eq. (20) for that temperature step.…”