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This document investigates the fluid-structure coupling vibration characteristics of rod bundle fuel elements used in nuclear reactors. It concludes that the natural frequency of fuel rods decreases with increasing flow rate, and the presence of spacer grids significantly affects the downstream flow field, although the vibration impact on the flow field can be neglected in thermal-hydraulic design. Additionally, the study finds that the vibrations of the rod bundles are random and not induced by the spacer

Author

qiaomu2025

Language

EN