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 |
Recent Transient Fission Gas Results from High Burnup UO2 Under Severe Accident Conditions |
Author(s) |
Jason M. Harp, Yong Yan, Peter Doyle, Matthew Jones, Nathan Capps |
On-Site Speaker (Planned) |
Jason M. Harp |
Abstract Scope |
In high burnup commercial light water reactor fuel, there is a concern that transient fission gas release (tFGR) during the temperature ramp associated with loss-of-coolant accidents (LOCAs) is a significant contributor to the total pressure in a fuel pin and may result in preliminary burst. The available relevant data is sparse and only covers a limited set of fuel conditions. Factors that control tFGR are complex and specific to LOCAs which makes the generation of new, relevant data complex. Recent modifications to the Oak Ridge National Laboratory Severe Accident Test Station now enable the collection of additional tFGR data. The results from several recent tFGR measurements will be discussed and compared to the available data. The microstructure of the fuel after testing will be presented to further illustrate the regions of the fuel responsible for tFGR. The isotopic composition of the transient fission gas will also be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, Characterization |