About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
Presentation Title |
In Situ Ion Irradiation of a Spent UO2 Fuel |
Author(s) |
Yunyuan Lu, Cameron Howard, Wei-Ying Chen, Sudipta Biswas, Chao Jiang, Dewen Yushu, Jatuporn Burns, Lingfeng He |
On-Site Speaker (Planned) |
Yunyuan Lu |
Abstract Scope |
High-burn up structure (HBS) formation in nuclear fuels undergoes grain subdivision and associated fission products evolution. We proposed to study HBS formation mechanisms by integrating in situ ion irradiation experiment and multiscale modeling. A spent UO2 fuel containing early stage of HBS was selected for ion irradiation. Transmission electron microscopy (TEM) samples were prepared from rim regions of a fuel pellet using focused ion beam techniques. Local HBS with nanograins and nano fission products including Kr/Xe and five metal precipitates coexist in the samples before ion irradiation. The ion irradiation was performed using 1 MeV Kr or 300 keV Xe at room temperature, 300℃, and 500℃ to visualize the in situ microstructural evolution. The evolution of bubble size, precipitates size, number of bubble/precipitates pair and nanograin size as a function of ion dose and irradiation temperature were studied and supported by our modeling efforts. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, Modeling and Simulation |