目的 系统验证某乏燃料运输容器在正常和事故工况下的热工性能,并评估其在特定冲击工况下的结构完整性,为同类型容器热工与抗冲击分析提供技术路线。方法 本研究采用有限元数值模拟方法,对运输容器进行以下工况分析和研究：（1）容器在正常和事故运输工况下的热分析;（2）容器内置不同功率比条件下乏燃料组件的温度分布特性研究;（3）正常工况下的1米落棒贯穿试验;（4）事故工况下的9米跌落试验和1米穿刺试验。结果 数值模拟结果显示,容器本体及乏燃料组件在正常和事故运输工况下,热安全性良好,各部件均未超过最高温度限值;容器在多种冲击载荷下,满足应力强度要求,确保了容器在特定位置相应冲击工况下的筒体结构完整性。结论 计算结果均满足相关规范要求,该研究结果可为乏燃料运输容器热工与抗冲击性能分析提供参考依据。
Abstract
The work aims to systematically verify the thermal performance of a certain spent fuel transport cask under normal and accident conditions, and evaluate its structural integrity under specific impact conditions, so as to provide a technical approach for thermal and impact resistance analysis of similar casks. The finite element numerical simulation method was applied to analyze and study the following operating conditions of the transport cask: (1) thermal analysis of the cask under normal and accident transport conditions; (2) research on the temperature distribution characteristics of spent fuel assemblies with different power ratios inside the cask; (3) 1-meter drop bar penetration test under normal operating conditions; and (4) 9-meter drop test and 1-meter puncture test under accident conditions. The numerical simulation results showed that the cask body and spent fuel assemblies had good thermal safety under normal and accident transportation conditions, and all components did not exceed the maximum temperature limit; Under various impact loads, the cask met the stress intensity requirements, ensuring the structural integrity of the cask at specific locations under corresponding impact conditions. All the above calculation results meet the relevant regulatory requirements, and this research result can provide a reference for the thermal and impact resistance performance analysis of spent fuel transport casks.
关键词
乏燃料运输容器 /
热工分析 /
跌落冲击 /
数值模拟
Key words
spent fuel transport cask /
thermal analysis /
falling impact /
numerical simulation
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参考文献
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基金
国家自然科学基金（11902141）; 湖南省教育厅科学研究项目（20C1635）
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