| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Microstructural, Mechanical, and Chemical Behavior of Solid Nuclear Fuel and Fuel-Cladding Interface II
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| Presentation Title |
The Thermal Mechanical Properties and Transient Behavior of High Burn-Up Structure Pure and Cr2O3-Doped UO2 Pellets with Xe Gas Bearing Under the LOCA and RIA Thermal Shock Tests |
| Author(s) |
Dong Zhao, Kevin Yan, Saurabh Kr. Sharma, Andre Broussard, Heng Ban, Jie Lian |
| On-Site Speaker (Planned) |
Dong Zhao |
| Abstract Scope |
The thermal-mechanical properties and transient behavior of the high burn up structure (HBS) UO2 under loss of coolant accident (LOCA) and reactivity-initiated accident (RIA) are critical for the fuel performance evaluation and licensing. Here, the pure and Cr2O3 doped HBS UO2 samples with controlled porosity and Xe gas bearing pores have been fabricated through spark plasma sintering (SPS), and their thermal-mechanical properties are measured as functions of microstructure and Cr2O3 doping. Furthermore, their transient behavior under the LOCA and RIA has been simulated through the thermal shock tests based on SPS with ramping rates ranging from 10 to 500 ℃ per second. In order to understand the fragmentation mechanism of the samples under different thermal shock tests, finite element analysis (FEA) has been employed to calculate the thermal stress based on the temperature profile gathered from the experimental LOCA and RIA thermal shock tests. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nuclear Materials, Ceramics |