UO2 pore migration and grain growth kinetics
A mathematical model for determining the UO/sub 2/ grain growth rate was developed in order to evaluate UO/sub 2/ steady-state creep rates and fracture strengths. This model may also be applied in the postirradiation examination of UO/sub 2/ nuclear fuel rods to estimate fuel temperatures experienced during experiments performed in the Loss-of-Fluid Test (LOFT) facility at the Idaho National Enginering Laboratory. The model was developed from a study of experimental data of UO/sub 2/ grain growth rates and of pore migration rates in UO/sub 2/ and effects of pore size and bubble pressure upon the migration rates. Because pores attached to UO/sub 2/ grain boundaries inhibit the rate of grain growth, a study of grain growth kinetics must consider the UO/sub 2/ pore migration rates.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 6042697
- Report Number(s):
- CONF-790802--12
- Country of Publication:
- United States
- Language:
- English
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