| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1567093 | Journal of Nuclear Materials | 2011 | 6 Pages |
Abstract
Using a meso-scale modeling approach, we have investigated how intergranular fission gas bubbles, as observed in high-burn-up nuclear fuel, modify the effective thermal conductivity in a polycrystalline material. The calculations reveal that intergranular porosity has a significantly higher resistance to heat transfer compared to randomly-distributed porosity. A model is developed to describe this conductivity reduction that considers an effective grain boundary Kapitza resistance as a function of the fractional coverage of grain boundaries by bubbles.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Paul C. Millett, Michael Tonks,