In-Pile Fission Gas Release from UC at Temperature around 2,000°C

Abstract

In-pile fission gas release from nearly stoichiometric sintered uranium monocarbide was measured in the temperature range from 1,650° to 2,030°C. The result was analyzed on the basis of the diffusion model, from which the diffusion coefficient of krypton in uranium monocarbide was derived as

D=1.6×10⁻⁷ exp(–56,400/RT) cm²/sec.

These values were compared with the result obtained with UO₂ in the same irradiation facility.