Abstract
We have developed a model for the precipitation of fission products in a grain boundary which embodies a variable reaction rate on the precipitate surface. This enables us to account for modifications of the local fuel chemistry, or to distinguish between the behaviour of different migrating species. In addition, we have assessed the influence of the trapping parameters on the precipitation rate according to different models from the open literature which have been extended in order to incorporate the variable intrinsic reaction rate. The interrelationships among the models have been established while their limitations and range of validity have been discussed. The results reveal that there is a critical value above which the influence of the intrinsic reaction rate, between a fission product and an intergranular trap, on the global precipitation rate becomes negligible.
| Original language | English |
|---|---|
| Pages (from-to) | 275-284 |
| Number of pages | 10 |
| Journal | Journal of Nuclear Materials |
| Volume | 280 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 2000 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- General Materials Science
- Nuclear Energy and Engineering