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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Spent fuel transfer project completed at INL
Work crews at Idaho National Laboratory have transferred 40 spent nuclear fuel canisters into long-term storage vaults, the Department of Energy’s Office of Environmental Management has reported.
Qi Li, Song Jiang, Wenjun Sun, Xiaojing Xu
Nuclear Science and Engineering | Volume 198 | Number 5 | May 2024 | Pages 993-1020
Research Article | doi.org/10.1080/00295639.2023.2230416
Articles are hosted by Taylor and Francis Online.
The aim of this paper is to construct a new numerical scheme for the nonlinear gray radiative transfer (GRT) equations, namely, the asymptotic-preserving (AP) -based unified gas kinetic scheme (UGKS). The constructed scheme is obtained by combing the UGKS for spatial discretization with the hybrid method for angular discretization. Since the is a hybrid angular discrete method of both and methods, the current -based UGKS can not only mitigate the ray effects of the method largely, but also suppress the oscillations of the original method. Furthermore, we show that the current -based UGKS also inherits the AP property of UGKS. A number of one-dimensional and two-dimensional numerical experiments are presented that validate the performance of the current scheme in both optically thin and thick regimes, as well as in mitigating the ray effects. Moreover, it can capture the initial layer solution without requiring additional treatments.