| 摘要: |
| 目的 要求某核电厂乏燃料池净化系统过滤器滤芯专用屏蔽运输容器在运输事故条件下具有安全性和完整性。方法 使用ANSYS和LS-PrePost软件的前处理功能建立屏蔽运输容器的有限元模型，计算容器运输事故工况不同跌落姿态下的应变、变形等，并对容器结构完整性进行评价。结果 对比分析14种跌落姿态下的应变、变形等，得出底部45°角跌落A和底部70°角跌落A的情况下，外层筒体最大塑性应变大于材料失效塑性应变0.45，其余部件最大塑性应变小于材料失效塑性应变。结论 由于筒体为双层结构，外侧局部失效不影响容器结构完整性，因此在事故条件下屏蔽运输容器的快速扳手不打开，内容物不会散落，密封面仍能保持紧密接触，从而实现密封功能。 |
| 关键词: 屏蔽运输容器 有限元分析 运输事故工况 跌落姿态 结构完整性 |
| DOI：10.19554/j.cnki.1001-3563.2025.05.033 |
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| Drop Analysis of the Shielded Transport Container for the Filter Cartridge of the Spent Fuel Pool in a Nuclear Power Plant |
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BAI Huanhuan, LI Tieping, CHE Shuwei, SHEN Yingcai, SUN Liuye, FANG Yonggang
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(Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 100082, China)
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| Abstract: |
| The work aims to ensure the safety and integrity of the specialized shielded transport container for the filter cartridge of the spent fuel pool purification system in a nuclear power plant under transportation accident conditions. The pre-processing functions of ANSYS and LS-PrePost were used to establish a finite element model for the shielded transport container, calculate the strain and deformation of the container with different drop postures under transportation accident conditions, and evaluate the structural integrity of the container. By comparing and analyzing the strain and deformation under 14 different drop postures, it could be concluded that the maximum plastic strain of the outer cylinder under the bottom 45° angle drop A and the bottom 70° angle drop A was greater than the material failure plastic strain of 0.45, while the maximum plastic strain of other components was less than the material failure plastic strain. Due to the double-layer structure of the cylinder, local failure on the outer side does not affect the structural integrity of the container, therefore under accident conditions, the quick-release wrench of the shielded transport container will not open, and the contents will not scatter, and the sealing surface can still maintain close contact and achieve sealing function. |
| Key words: shielded transport container finite element analysis transportation accident conditions drop postures structural integrity |
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