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Rate theory scenarios study on fission gas behavior of U3Si2 under LOCA conditions in LWRs

Author:
Miao, Yinbin  Gamble, Kyle A.  Andersson, David  Mei, Zhi-Gang  Yacout, Abdellatif M.  


Journal:
NUCLEAR ENGINEERING AND DESIGN


Issue Date:
2018


Abstract(summary):

Fission gas behavior of U3Si2 under various loss-of-coolant accident (LOCA) conditions in light water reactors (LWRs) was simulated using rate theory. A rate theory model for U3Si2 that covers both steady-state operation and power transients was developed for the GRASS-SST code based on existing research reactor/ion irradiation experimental data and theoretical predictions of density functional theory (DFT) calculations. The steady-state and LOCA condition parameters were either directly provided or inspired by BISON simulations. Due to the absence of in-pile experiment data for U3Si2's fuel performance under LWR conditions at this stage of accident tolerant fuel (ATF) development, a variety of LOCA scenarios were taken into consideration to comprehensively and conservatively evaluate the fission gas behavior of U3Si2 during a LOCA.


Page:
371---382


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