| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
|
| Presentation Title |
Examination of U19Pu10Zr fluff structure by X-ray tomography and time-of-flight secondary ion mass spectrometry |
| Author(s) |
Jake Fay, Fidelma Di Lemma, Cameron Howard, William Chuirazzi, Luca Capriotti, Jie Lian |
| On-Site Speaker (Planned) |
Jake Fay |
| Abstract Scope |
During irradiation a highly porous structure forms at the top of metallic fuel pins. EPMA analysis of this region have indicated that fluff is primarily composed of fuel isotopes in the same ratio seen in bulk fuel. This causes fluff to potentially have an impact on reactor neutronics during normal operation and transients. Previous studies pairing radiograph data and operation data from EBR-II have shown that fluff increases with burnup and decreases with Pu content. This work expanded on this by portioning cube shaped lift-outs from a U19Pu10Zr fluff sample. These lift-outs were then analyzed by X-ray tomography, scanning electron microscopy (SEM), and by time-of-flight secondary ion mass spectrometry (SIMS). These analyses provided new data into the pore structure and isotopic composition of fluff which will be used to gain insight into the formation mechanisms of fluff. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, |