燃料组件滞留转运通道期间的自然循环冷却过程涉及复杂的流动和传热现象,需对转运通道内燃料组件的热工安全问题开展研究.通过对转运装置流动和传热过程进行分析,确定燃料组件表面最高温度位置与对应的运行工况,完成了基于取样的实验模型设计.建立了针对转运通道的相似准则,对实验模型进行了失真分析.分析结果表明,实验模型保守,可用来评价转运装置中燃料组件的热工安全状态.%It is important to study the thermal-hydraulic safety issues of the fuel assem-bly during the transportation in the fuel transfer tunnel . The flow and heat transfer mechanism was complicated when cooling the fuel assembly by natural circulation in the transfer tunnel .After analyzing the flow field in the transfer tunnel ,the position of highest surface temperature was determined .The test facility was designed by sampling the high temperature zone .A set of similarity criterion was developed for distortion analysis of the test facility .The analysis results show that the test facility is conserva-tive to evaluate the thermal-hydraulic safety of the assembly .
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