About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ceramics and Ceramic-Based Composites for Nuclear Applications III
|
| Presentation Title |
Fabrication of Engineered Oxide Fuels Mimicking High Burnup Fuels and their Fragmentation Mechanisms Under Simulated LOCA and RIA Thermal Transient |
| Author(s) |
Jie Lian |
| On-Site Speaker (Planned) |
Jie Lian |
| Abstract Scope |
Understanding the cracking and fragmentation behaviors of high burn-up structure (HBS) UO₂ under accident scenarios, e.g., loss of coolant accident (LOCA) and reactivity-initiated events (RIA), is crucial for evaluating fuel performance and qualifying the fuel. In this study, we fabricated both pure and Cr₂O₃-doped HBS UO₂ specimens with controlled porosity and xenon-bearing pores using spark plasma sintering (SPS) and characterize their thermal-mechanical properties as a function of grain structure, porosity and doping. The transient behavior of the fuels was investigated systematically under simulated transient events mimicking the prototypical temperature ramping of LOCA and RIAs using the ultrafast thermal shock tests using SPS, applying temperature ramp rates ranging from 10 to 500 °C per second. The impacts of the microstructure and Cr₂O₃ doping and Xe incorporation on the cracking and fragmentation behavior are investigated and correlated with their thermal-mechanical properties and microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Nuclear Materials, |