NSUF 18-1561: Grain Size Effects on He and Xe behavior in UO2 and ThO2
It has been reported that radiation tolerance of materials increases as the grain size approaches the nanoscale, suggesting that grain boundaries act as defect sinks and hence favor defect annihilation. However, there is a lack of data concerning the performances of UO2 and this work aims to fill that gap, in particular for what concerns low grain sizes. An innovative aspect is indeed the concept of submitting to the same radiation conditions, which were reported in previous similar experiments, a series of samples which only differ for the grain size, removing any other possible reason for the enhanced radiation tolerance. Revealing grain size effects on radiation tolerance and rare gases Xe and He- retention in UO2 and ThO2 will be the main purpose of this study. The comparison between the microstructure features of UO2 and ThO2 under various doses and temperatures will shed light on both the dose and temperature effects on dislocation, bubble formation and evolution. This rapid turnaround project includes in situ TEM observation using IVEM-Tandem facility at ANL, experimental data analysis and final report, which will take about 9 months in total. The proposed research will be performed in about 2 weeks at ANL.
Допълнителна информация
| Поле | Стойност |
|---|---|
| Awarded Institution | European Commission |
| Embargo End Date | 2026-02-27 |
| Facility Tech Lead | Wei-Ying Chen |
| NSUF Call | FY 2018 RTE 3rd Call |
| PI | Thierry Wiss |
| Project Member | Dr. Lingfeng He, Associate Professor - North Carolina State University (https://orcid.org/0000-0003-2763-1462) |
| Project Member | Dr Thierry Wiss, Senior expert - European Commission (https://orcid.org/0000-0001-9725-1866) |
| Project Notes | Awarded on 09/17/2018 |
| Project Type | RTE |
| Publication | Advanced Characterization of Irradiated UO2 Fuel Lingfeng He, Michael Moorehead, Brandon Miller, Jason Harp, Xianming Bai TMS 2018 2018-03-11 - 2018-03-15 |
| Publication | On Spinodal-like Phase Decomposition in U-50 Zr Alloy Lingfeng He Materialia 9 2020-01-11 https://doi.org/10.1016/j.mtla.2020.100592 |
| RTE Number | 1561 |