彭星铭,龙波,盛锋.乏燃料转运容器厂房内跌落完整性评估[J].包装工程,2025,(1):257-263.
PENG Xingming,LONG Bo,SHENG Feng.Integrity Assessment of Spent Fuel Transfer Cask Dropping in Fuel Building[J].Packaging Engineering,2025,(1):257-263. |
| 乏燃料转运容器厂房内跌落完整性评估 |
| Integrity Assessment of Spent Fuel Transfer Cask Dropping in Fuel Building |
| 投稿时间：2024-09-26 |
| DOI：10.19554/j.cnki.1001-3563.2025.01.029 |
| 中文关键词: 乏燃料转运容器 跌落事故 完整性 二次跌落 减振 |
| 英文关键词: spent fuel transfer cask dropping accidents integrity second drop shock absorption |
| 基金项目:国家重点研发计划(2021YFB3302501) |
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| 中文摘要: |
| 目的 乏燃料转运容器在厂房内吊装时可能高空跌落，致使包容边界破损;由于存在楼板被跌穿引发二次跌落的风险，其完整性评估需合理考虑一次跌落的累计塑性应变和剩余动能的影响，为此开展乏燃料转运容器厂房内跌落完整性评估研究。方法 以核电厂燃料厂房吊装跌落事故为例，通过ANSYS/LS-DYNA 构建有限元模型，考虑靶面楼板钢筋混凝土损伤，进行一次跌落动力学仿真，并将一次跌落累计塑性应变和剩余动能作为二次跌落初始条件开展仿真，最后根据二次跌落结果设计减振层，并完成仿真和评估。结果 一次跌落包容边界完整，但楼板被跌穿;二次跌落因剩余动能大，在二次跌落靶面楼板设置垫木减振后，包容边界才满足完整性要求。结论 此研究可验证乏燃料转运容器厂房内跌落的完整性，为相关安全审查和类似设备跌落事故分析提供参考。 |
| 英文摘要: |
| The spent fuel transfer cask may drop from a high altitude during hoisting in the fuel building, causing damage to the containment boundary. Due to the risk of the second drop caused by the penetration through the floor, the cumulative plastic strain and residual kinetic energy in the first drop need to be considered reasonably in the integrity assessment. Therefore, the work aims to conduct a study on the integrity assessment of spent fuel transfer cask dropping in fuel building. With the dropping accident during hoisting in the fuel building of a nuclear power plant as an example, a finite element model was constructed with ANSYS/LS-DYNA by considering the damage to the reinforced concrete of the target floor. The dynamic simulation of the first drop was conducted, and the cumulative plastic strain and residual kinetic energy of the first drop were used as the initial conditions for the second drop. Finally, a shock absorption layer was designed and simulated based on the results of the second drop, and the evaluation was completed. The containment boundary was intact during the first drop, but the floor was penetrated by the drop impact. Due to the large residual kinetic energy during the second drop, the containment boundary only met the integrity requirements after the wood pad was set to reduce vibration on the target floor during the second drop. This study can verify the integrity of spent fuel transfer cask after dropping in the fuel building and provide important reference for relevant safety reviews and dropping accident analysis of similar equipment. |
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