Diffusion of Cerium and Zirconium in Molten Uranium

Abstract

Coefficients for the diffusion of cerium in molten uranium have been measured over the temperature range 1170°–1480°C. An equation relating the diffusion coefficient with temperature is: D=4.5×10−3 e−11,000/RT . At 1200°C the diffusion coefficient for cerium in uranium is false(1.00±0.17false)×10−4 cm2/sec . An estimate of the coefficient of diffusion for zirconium in uranium at 1270°C is false(1.9±0.9false)×10−4 cm2/sec . A discussion of experimental errors involved in measuring diffusion coefficients at high temperatures is given.

Diffusion-Controlled Dissolution of Zirconium in Molten Uranium With Monotonically Increasing Temperature

“…17) shows that for nj = 5.0 x 1 O''neutrons/(cm3)(sec), T is just yiO greater than it is for nj = 5.0 x 1 0® neutrons/(cm^)(sec), and hence for this new case, a = 920. 8 ;…”