基于多表面封闭系统网络法的钠冷快堆乏燃料组件内部传热数值分析  

Numerical Prediction of Radiation Heat Transfer in Spent Fuel Assembly Based on Network Method for Multi-surface Enclosure

作　　者：陈翔 吴增辉 熊进标[1] 程旭[1] 师泰 CHEN Xiang;WU Zenghui;XIONG Jinbiao;CHENG Xu;SHI Tai(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]中国原子能科学研究院反应堆工程技术研究部,北京102413

出　　处：《原子能科学技术》2020年第9期1666-1672,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(51676120)

摘　　要：钠冷快堆乏燃料组件在转运过程中会暴露在气体环境中,散热性能明显下降。为预测乏燃料组件在气体环境中的温度分布,特别是避免燃料组件包壳最高温度超过设计限值,本文建立了基于多表面封闭系统网络法的数值模型,以此为基础开发了数值分析程序。通过与37棒束模拟组件实验数据的对比,验证了程序的可靠性。通过与Manteufel-Todreas双层模型预测结果的比较,证明了程序更具有保守性。另外,比较了均匀与非均匀加热两种情况下的温度分布,分析了加热功率、表面发射率对温度的影响。Spent fuel assemblies in sodium-cooled fast reactor will be exposed in gas environment during transport process,leading to the worse heat transfer performance distinctly.For purpose of predicting the temperature distribution of spent fuel assemblies in gas environment,especially preventing the highest temperature of cladding exceeding the design limits,a numerical model was established based on network method for multi-surface enclosure,and a code intended for numerical analysis was developed based on this model.Reliability of the code was verified due to the comparison with experimental data of 37-rod simulated assembly.The code was confirmed to be more conservative than the Manteufel-Todreas correlation while comparing the predicting result of both.In addition,the temperature distributions under uniform-heating condition and nonuniform-heating condition were compared,and the influences of heating power and surface emissivity on temperature were analyzed.

关 键 词：钠冷快堆 乏燃料组件 辐射传热 数值模型 

分 类 号：TL333[核科学技术—核技术及应用]