燃料运输容器跌落姿态分析技术

目的总结燃料运输容器跌落分析流程,设计合理的姿态分析方案,通过分析使燃料运输容器设计满足GB 11806规定的跌落试验要求。方法使用动力有限元方法对新燃料运输容器进行多姿态多工况的跌落分析,并根据试验结果对分析结果进行验证,将分析和试验经验总结成完整的分析流程。结果通过分析,新燃料运输容器在正常运输条件下的最不利跌落姿态为9°小角度跌落,该工况下容器外壳最大变形量为49 mm。事故运输条件下最不利跌落姿态为正向垂直跌落,燃料组件最大冲击力为1.78 MN。结合分析和试验结果总结了容器最不利跌落姿态的分析流程和技术要点。结论结合分析和试验结果,得到了新燃料运输容器各跌落试验的最不利跌落姿态,并总结了燃料运输容器跌落分析的通用流程。

Drop Gesture Analysis of the Fuel Transport Cask

The work aims to summarize the fuel transport cask drop analysis process, design the reasonable gesture analysis scheme, and make sure that the design of fuel transport cask can meet the requirements of GB 11806 rules for drop test through analysis. The method of dynamic FEA was used to analyze the drop of multi-position and multi-mode new fuel transport cask, and the analysis results were verified based on the test results. The analysis and test experience were summarized into the complete analysis process. Through the analysis, the worst drop gesture of the new fuel transport cask under normal transport conditions was 9° small angle drop, and the maximum deformation of cask shell under the condition was 49 mm. The worst drop gesture under accident transport conditions was forward vertical drop and the biggest impact force of fuel assemblies was 1.78 MN. In combination with the analysis and test results, the most unfavorable drop gesture analysis process and key technical points of the cask were summarized. Combined with the analysis and test results, the most unfavorable drop gesture of the new fuel transport cask is obtained, and the general analysis flow of the fuel transport cask drop is summarized.