Study on single-phase flow and irradiation mechanics multi-physics field coupling properties of three-petal fuel rod

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Annals of Nuclear Energy Pub Date : 2024-11-16 DOI:10.1016/j.anucene.2024.111057

Shusong Qin , Binxian He , Xiangfei Meng , Jianchuang Sun , Wenchao Zhang , Weihua Cai

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Abstract

As a new type of fuel assembly, the thermo-hydraulic and mechanical properties of petal-shaped fuel rod are directly related to the safe operation of the reactor. In this study, the multi-physics field coupled model for coolant single-phase flow heat transfer, and mechanical properties of three-petal fuel rod is established through ABAQUS-STAR CCM+, realizing real-time data interaction between different computational domains. The results show that the transverse flow of coolant affects the temperature field distribution, and the multi-physics field coupling is closer to the real situation of convective heat transfer of fuel rods. Under the irradiation swelling, the maximum Mises stress moved from the inner concave arc to the outer convex arc, and increased to 433.23 MPa at the burnup of 8.22 % fissions of initial mental atoms (FIMA). In addition, the properties of the fuel rod at different inlet flow velocities are analyzed. When the burnup reaches 3.31 % FIMA at 2.5 m/s inlet flow velocity, it enters the plastic stage earlier. The effect of different coupling modes on displacement deformation is also discussed, which shows that it is feasible to ignore the influence of displacement deformation of the fuel rod on coolant.

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三瓣燃料棒的单相流和辐照力学多物理场耦合特性研究

作为一种新型燃料组件，花瓣形燃料棒的热工水力和力学性能直接关系到反应堆的安全运行。本研究通过 ABAQUS-STAR CCM+ 建立了三瓣燃料棒冷却剂单相流传热和力学性能的多物理场耦合模型，实现了不同计算域之间的实时数据交互。结果表明，冷却剂横向流动影响温度场分布，多物理场耦合更接近燃料棒对流传热的真实情况。在辐照膨胀作用下，最大米塞斯应力从内凹弧向外凸弧移动，在初始精神原子裂变率（FIMA）为 8.22% 的燃烧度下，最大米塞斯应力增至 433.23 MPa。此外，还分析了不同入口流速下燃料棒的特性。在 2.5 m/s 的入口流速下，当燃烧度达到 3.31 % FIMA 时，燃料棒较早进入塑性阶段。此外，还讨论了不同耦合模式对位移变形的影响，这表明忽略燃料棒位移变形对冷却剂的影响是可行的。

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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.