About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Computational Materials Science and Engineering of Materials in Nuclear Reactors
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Presentation Title |
Phase-field Simulation of Intergranular Fission Gas Bubble Growth in Uranium Silicide |
Author(s) |
Larry Aagesen, David Andersson, Benjamin Beeler, Michael Cooper, Kyle Gamble, Yinbin Miao, Giovanni Pastore, Cody Permann, Michael Tonks |
On-Site Speaker (Planned) |
Larry Aagesen |
Abstract Scope |
Uranium silicide (U3Si2) is considered a promising candidate for use as an accident-tolerant fuel (ATF) in nuclear reactors due to its high thermal conductivity compared with UO2. However, its swelling and fission gas release behavior have not yet been thoroughly characterized. In the absence of experimental data, a multi-scale model of U3Si2 fuel performance has been developed using Idaho National Laboratory’s Bison code. The rate of percolation of intergranular gas bubbles has a significant influence on the model’s predictions of swelling and gas release. A phase-field model in Idaho National Laboratory’s Marmot code was used to simulate the rate of percolation of intergranular bubbles. The phase-field model is based on a grand-potential formulation that considers monovacancies and Xe atoms as defect species, and was parameterized using lower-length scale calculations. The phase-field simulation results were used to parameterize the engineering-scale Bison model. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |