TY - GEN
T1 - Numerical Simulation of Fission Products Release Following Fuel Cladding Failure in the Lead-Based Fast Reactor
AU - Wang, Yining
AU - Hu, Rongxiao
AU - Xiao, Xinkun
AU - Chen, Ronghua
AU - Tian, Wenxi
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
PY - 2026
Y1 - 2026
N2 - This study investigates the behavior of fission products during cladding failure in lead-based nuclear reactors, with a particular focus on the release mechanisms of solid fission products. A three-dimensional numerical model of the cladding-breach-subchannel system was developed to analyze these processes. To account for the phenomenon of deposited particles re-entering the fluid from the surface, this study proposes a torque balance-based resuspension criterion specifically designed for vertical walls. This method enables an accurate simulation of particle resuspension behavior within the Lagrangian framework. The results reveal that the release of fission products occurs in two distinct stages: the rapid depressurization stage and the equilibrium release stage. During the rapid depressurization stage, a significant pressure differential between the interior and exterior of the fuel rod drives the formation of a high-speed jet, which transports a substantial quantity of solid fission products into the coolant. The resuspension and release of deposited particles predominantly take place in this stage. However, the final release rate of resuspended particles is significantly lower than that of migrating particles, indicating that particle resuspension is a critical factor in limiting the overall release of solid fission products.
AB - This study investigates the behavior of fission products during cladding failure in lead-based nuclear reactors, with a particular focus on the release mechanisms of solid fission products. A three-dimensional numerical model of the cladding-breach-subchannel system was developed to analyze these processes. To account for the phenomenon of deposited particles re-entering the fluid from the surface, this study proposes a torque balance-based resuspension criterion specifically designed for vertical walls. This method enables an accurate simulation of particle resuspension behavior within the Lagrangian framework. The results reveal that the release of fission products occurs in two distinct stages: the rapid depressurization stage and the equilibrium release stage. During the rapid depressurization stage, a significant pressure differential between the interior and exterior of the fuel rod drives the formation of a high-speed jet, which transports a substantial quantity of solid fission products into the coolant. The resuspension and release of deposited particles predominantly take place in this stage. However, the final release rate of resuspended particles is significantly lower than that of migrating particles, indicating that particle resuspension is a critical factor in limiting the overall release of solid fission products.
KW - Computational fluid dynamics
KW - Fuel cladding failure
KW - Lead-based fast reactor
KW - Particle behavior
UR - https://www.scopus.com/pages/publications/105045809457
U2 - 10.1007/978-981-95-3237-7_35
DO - 10.1007/978-981-95-3237-7_35
M3 - 会议稿件
AN - SCOPUS:105045809457
SN - 9789819532360
T3 - Springer Proceedings in Physics
SP - 417
EP - 431
BT - Proceedings of the 32nd International Conference on Nuclear Engineering— Volume 8, ICONE 2025- Nuclear Codes and Standards, Licensing and Regulation, Mitigation Strategy for Beyond Design Basic Events
A2 - Tan, Sichao
A2 - Xu, Weiqiang
A2 - Zhu, Yanyan
PB - Springer Science and Business Media Deutschland GmbH
T2 - 32nd International Conference on Nuclear Engineering, ICONE 2025
Y2 - 22 June 2025 through 26 June 2025
ER -