Temperature and dose dependence of fission-gas-bubble swelling in U3Si2 |
| |
Authors: | Yeon Soo Kim GL Hofman AB Robinson |
| |
Affiliation: | a Argonne National Laboratory, Nuclear Engineering, 9700 South Cass Avenue, Argonne, IL 60439, United States b Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID 83415-6188, United States |
| |
Abstract: | Large fission gas bubbles were observed during metallographic examination of an irradiated U3Si2 dispersion fuel plate (U0R040) in the Advanced Test Reactor (ATR). The fuel temperature of this plate was higher than for most of the previous silicide-fuel tests where much smaller bubble growth was observed. The apparent conditions for the large bubble growth are high fission density (6.1 × 1021 f/cm3) and high fuel temperature (life-average 160 °C). After analysis of PIE results of U0R040 and previous ANL test plates, a modification to the existing athermal bubble growth model appears to be necessary for high temperature application (above 130 °C). A detailed analysis was performed using a model for the irradiation-induced viscosity of binary alloys to explain the effect of the increased fuel temperature. Threshold curves are proposed in terms of fuel temperature and fission density above which formation and interconnection of bubbles larger than 5 μ are possible. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|