| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1565085 | Journal of Nuclear Materials | 2014 | 7 Pages |
Abstract
Grain boundary (GB) separation as a mechanism for fission gas release (FGR), complementary to gas bubble interlinkage, has been experimentally observed in irradiated light water reactor fuel. However there has been limited effort to develop physics-based models incorporating this mechanism for the analysis of FGR. In this work, a computational study is carried out to investigate GB separation in UO2 fuel under the effect of gas bubble pressure and hydrostatic stress. A non-dimensional stress intensity factor formula is obtained through 2D axisymmetric analyses considering lenticular bubbles and Mode-I crack growth. The obtained functional form can be used in higher length-scale models to estimate the contribution of GB separation to FGR.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Pritam Chakraborty, Michael R. Tonks, Giovanni Pastore,