行波堆TP-1堆芯热工水力单通道与子通道分析方法研究

Research on Single Channel and Subchannel in Thermal-hydraulic Analysis of TP-1 Sodium Cooled TWR

摘要: 以泰拉能源公司提出的钠冷行波堆TP-1为研究对象，通过钠冷行波堆瞬态安全分析程序TAST得到堆芯各组件内冷却剂、包壳和燃料棒的平均温度分布。用子通道分析程序SACOS-Na对TAST计算得到的最热组件进行详细分析计算，得到该组件内冷却剂的温度、压力和流速分布，并得到燃料棒和包壳的温度场。结果表明：单通道与子通道的结合使用能有效提高计算效率，提高反应堆设计的安全性。

Abstract: The average temperatures of coolant, cladding, and fuel rod of each subassembly of TP-1 sodium cooled traveling wave reactor (TWR) which was designed by TerraPower Co. were obtained by a single channel code TAST. The hottest subassembly was also identified by TAST. Temperature, velocity and pressure distributions in the hottest subassembly were calculated by the subchannel analysis code SACOS-Na. The results indicate that coupling the single channel analysis code TAST with the subchannel analysis code SACOS-Na can effectively improve the computational efficiency and enhance the safety of reactor design.