.png){kind=icon}
.png){kind=icon}
Return
Numerical investigation of thermal striping in triple-jets with lead-bismuth eutectic under temperature difference up to 100 K
.png){kind=icon}
PRE
AI
W
C
R
Y
H
J
Q
DOI：10.1016/j.pnucene.2026.106481.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The temperature differences of the coolant among different fuel assemblies in a Lead-cooled Fast Reactor (LFR) can reach up to 100 K, leading to intense temperature fluctuations when the coolant mixes in the downstream of the core outlet. The temperature fluctuations of the coolant are transferred to the surrounding structure via the high-thermal-conductivity lead-bismuth eutectic (LBE), triggering thermal striping and threatening reactor safety. A numerical study is conducted in this paper to investigate the temperature fluctuations in LBE triple-jets and their wall surfaces under 40–100 K temperature difference conditions. Through quantitative analysis of the velocity and temperature fields, the flow development process inside the model is elaborated in detail. The results show that the temperature difference negligibly affects the velocity field but markedly alters the temperature field, the intensity of temperature fluctuations increase with the rising temperature difference. The spectral analysis indicates that the maximum amplitude and standard deviation of temperature fluctuations rise with temperature difference. The results provide a reference for elucidating the underlying mechanism of thermal striping at the core outlet of LFR.
Journal
IF:
3.2
Papers:
5.5K
Citations:
10.0K
Organization
No organization information available
Cited Papers