| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments V
|
| Presentation Title |
Understanding the Mechanism of Fission Gas Re-Solution and Blistering in UMo Fuel via Atomistic Modelling |
| Author(s) |
Linu Malakkal, ATM Jahid Hasan, Mathew M Swisher, Benjamin Beeler |
| On-Site Speaker (Planned) |
Linu Malakkal |
| Abstract Scope |
A U-Mo alloy-based monolithic fuel design has been identified as the fuel type for converting the United States High-Performance Research Reactor (HPRR). The qualification of new fuel types necessitates an understanding of fuel performance under extreme conditions. At high burnup, the U-Mo monolithic fuel exhibits excessive swelling during operation. To understand the fuel evolution under irradiation, mesoscale and engineering-level fuel performance models require knowledge of the fundamental mechanistic behavior of fission products in the fuel. Understanding the progression of Xe gas bubbles in the fuel is crucial. Under irradiation, the Xe atoms in the gas bubble are reabsorbed into the fuel matrix, reducing the bubble size. In addition, at relatively high burnup, the formation of blisters on the fuel plate surface was observed. In this work, we investigate the re-solution of xenon gas bubbles and blistering in U-Mo fuel using molecular dynamics simulations. |