李精精,刘梦影,桂重.压水堆24P乏燃料运输容器热工安全分析研究[J].包装工程,2024,45(21):62-68.
LI Jingjing,LIU Mengying,GUI Zhong.Thermal Analysis of PWR 24P Spent Fuel Transport Cask[J].Packaging Engineering,2024,45(21):62-68. |
| 压水堆24P乏燃料运输容器热工安全分析研究 |
| Thermal Analysis of PWR 24P Spent Fuel Transport Cask |
| 投稿时间：2024-09-04 |
| DOI：10.19554/j.cnki.1001-3563.2024.21.010 |
| 中文关键词: 乏燃料运输容器 热工 安全分析 压水堆 |
| 英文关键词: spent fuel transport cask thermal analysis safety analysis PWR (pressurized water reactor) |
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| 中文摘要: |
| 目的 本研究对压水堆24P乏燃料运输容器开展热工分析，以确保其设计满足安全分析的要求并为其装载操作提供合理的时间窗口。方法 本文采用计算流体力学软件对乏燃料运输容器在装载工况、正常运输工况和事故工况下受热情况开展三维分析，得出了不同工况下各部件的最高温度和容器内腔水的沸腾时间随衰变热功率和水池初始温度的变化，为乏燃料组件装载操作时间窗口的确定提供了依据。结果 分析结果显示:采用氮气排水之后，在真空干燥约34.37 h时乏燃料组件最高温度达到400 ℃，如因异常工况导致真空干燥无法完成，则需在该时间窗口前完成氦气回填操作，以保证组件温度在安全限值以内。在正常运输工况和事故工况下，容器主要结构部件的温度均在部件安全温度限值以内;在事故工况下，乏燃料组件温度约在事故后22 h达到最大值379.7 ℃，满足法规要求。结论 本文的分析为后续乏燃料运输容器热工分析和装载操作提供参考。 |
| 英文摘要: |
| The work aims to conduct thermal analysis on the pressurized water reactor 24P spent fuel transport cask to ensure that its design meets the requirements of safety analysis, so as to provide a reasonable time window for its transportation operation. Computational fluid dynamics software was used to conduct 3D thermal analysis of the spent fuel transport cask under loading conditions, normal transportation conditions, and accident conditions. The highest temperature of each parts and the boiling time of the water inside the cask under different operating conditions were obtained as a function of decay heat and initial temperature of the pool, which provided a basis for determining the loading operation time window of the spent fuel assemblies. According to the analysis results, after using nitrogen drainage, the highest temperature of the spent fuel assemblies reached 400 ℃ after vacuum drying for about 34.37 hours. If the vacuum drying could not be completed due to abnormal conditions, the helium backfilling operation must be completed before this time window to ensure that assembly temperature was within the safe limit. Under normal transportation and accident conditions the temperature of the main parts of the cask was within the safe temperature limit. Under accident conditions, the temperature of the spent fuel assemblies reached its maximum value of 379.7 ℃ approximately 22 hours after the accident, meeting regulatory requirements. The analysis in this paper provides reference for the thermal analysis and loading operations of spent fuel transport casks in the future. |
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