主催: The Japan Society of Mechanical Engineers
会議名: 第30回 原子力工学国際会議（ICONE30）
開催日: 2023/05/21 - 2023/05/26
In the complex marine environment, the reactor will be accompanied by multi-degree-of-freedom additional motions such as tilt, heaving and rolling. These motions may change the flow and heat transfer characteristics of lead-bismuth eutectic, affecting the safety of the core. In this study, the typical rolling conditions are selected to explore its influence on the flow and heat transfer of lead-bismuth eutectic in wrapped-wire fuel assembly. The model of horizontal 19 rod bundle wrapped-wire fuel assembly was established, and refined numerical simulation was carried out based on computational fluid dynamics method. The specific rolling conditions are realized by user-defined functions. Compared with the static state, the results show that the change of the outlet secondary flow velocity is less than 10 % and the temperature fluctuation is within 1 degree. The friction factor and the heat transfer coefficient are almost unchanged, and the changes of streamline diagram and temperature contour of each axial section are not obvious. The typical rolling conditions have little effect on the flow and heat transfer characteristics of the wrapped-wire fuel assembly.
