压水堆燃料组件研发中的力学问题

Mechanic Problems in PWR Fuel Assembly Research and Development

燃料组件弯曲变形可能导致装卸料困难、控制棒不能完全下插;燃料组件间的微动磨蚀可能会造成元件棒破损和核燃料泄漏,这些都直接影响核电厂的安全运行和经济性。针对压水堆燃料组件研发中的组件弯曲变形、组件微动磨蚀、组件结构完整性分析等几类典型力学问题的关键因素和解决办法进行了综述和展望。

Fuel assembly bowing may induce the reloading or unloading difficulties, and the incomplete insertion of control rod. The fretting between fuel assemblies could result in the component damage and the leakage of nuclear fuels. These phenomena directly affect the safe operation and economic benefits of nuclear power plants. This paper summarizes the typical mechanic problems, such as bowing, fretting, and integrality analysis in PWR fuel assembly research and development. The key factors, resolving methods and prospect are also proposed.