Numerical modelling of rocking submerged spent fuel baskets under fluid–structure interaction

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-08-14 DOI:10.1016/j.anucene.2025.111813

Fei Zhao , Jiaojiao Dong , Yuchao Wang , Chen Wang , Jie Qi , Wei Qin , Xiaogang Xu , Daogang Lu , Yu Liu

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引用次数: 0

Abstract

Rocking structures are widely used in seismic design, including in spent fuel storage and transportation baskets in nuclear power plants. Rocking and overturning analysis of such baskets is essential for evaluating structural safety under seismic loading. To provide radiation shielding and cooling, the baskets are submerged in water, leading to significant fluid–structure interaction (FSI) effects during earthquakes. Previous experiments have demonstrated that FSI strongly influences the rocking amplitude. Finite element models developed for racks are not suitable for simulating the rocking behavior of baskets. This study develops a finite element model that can simulate the rocking motion of an underwater basket and calculate parameters such as the time history of the rocking angle. The model results are validated by comparing them with our previous experimental data. In addition, a parametric study is conducted to investigate the effects of the friction coefficient and aspect ratio on the rocking response. The results indicate that as the width increases and the friction coefficient decreases, the rocking amplitude decreases while the sliding displacement increases. Notably, abrupt changes in rocking amplitude are observed within certain width and friction coefficient ranges. The findings provide valuable insights for designing and optimizing submerged rocking structures.

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流固耦合作用下水下摇摆乏燃料篮数值模拟

摇晃结构在抗震设计中得到了广泛的应用，包括核电站的乏燃料储存和运输篮。在地震荷载作用下，篮架的摇晃和倾覆分析是评价结构安全性的重要手段。为了提供辐射屏蔽和冷却，篮子被淹没在水中，在地震期间导致显著的流体-结构相互作用（FSI）效应。先前的实验表明，FSI对摇摆振幅有很强的影响。为机架建立的有限元模型不适用于模拟篮架的摇摆行为。本研究建立了一个可以模拟水下吊篮摇摆运动的有限元模型，并计算出摇摆角时程等参数。通过与实验数据的比较，验证了模型的正确性。此外，还对摩擦系数和展弦比对振动响应的影响进行了参数化研究。结果表明：随着宽度的增大和摩擦系数的减小，振动幅值减小，滑动位移增大；值得注意的是，在一定的宽度和摩擦系数范围内，可以观察到摇摆振幅的突变。这些发现为水下摇摆结构的设计和优化提供了有价值的见解。

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.