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为评价CEFR-回路承压边界材料及焊缝（储钠罐、主容器等部件材料）在高温钠中的腐蚀性能,需在部件工况条件下对其进行验证实验。高温钠热对流实验回路能有效模拟该类部件所处的工况条件。为此,设计和建造高温钠热对流实验回路,进行快堆材料的腐蚀性能考验,以期获得国产材料的高温钠腐蚀性能数据。1 回路设计特点 1）主要部件（高、低温段）和管道均采用同批号的0CR18Ni9国产管材制造,其成分与所验证的材料尽量相近,以避免和减少因系统材质不同对实验造成的影响。 2）回路采用指状扩散冷阱以维持回路中钠的氧含量在一定值。 3）回路样品和取放装置采用取放箱过渡,样品操作在氩气保护下的取样箱内进行,既
In order to evaluate the corrosion performance of CEFR-circuit under pressure boundary material and weld (sodium carbonate tank, main container and other components) in high temperature sodium, it is required to verify the experiment under component working conditions. High-temperature sodium convection test circuit can effectively simulate the conditions of such components in the working conditions. To this end, the design and construction of high temperature sodium convection test circuit, the fast reactor corrosion test, in order to obtain domestic materials, high temperature sodium corrosion performance data. 1 Circuit Design Features 1) The main components (high and low temperature) and pipes are made of 0CR18Ni9 domestic pipe with the same batch, its composition and verified materials as close as possible to avoid and reduce the impact of experimental system due to different materials. 2) The circuit uses finger diffusion cold trap to maintain the oxygen content of sodium in the loop at a certain value. 3) The loop sample and pick-and-place device adopts the pick-and-place box transition, and the sample operation is performed in the sampling box under argon protection. Both