中国实验快堆粘钠设备动态去污技术模拟试验研究  

Study on Decontamination Technology of CEFR Component with Sodium by Dynamic Simulation Test

作　　者：张金权[1] 谢淳[1] 赵迅[1] 王密[1] 龙斌[1] ZHANG Jinquan;XIE Chun;ZHAO Xun;WANG Mi;LONG Bin(Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)Abstract:The decontamination simulation tests were performed in dynamic decontamination loop to choose)

机构地区：[1]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4期739-744,共6页Atomic Energy Science and Technology

摘　　要：采用硫酸和磷酸的混合酸作为去污剂,以530℃钠中浸泡3700 h的304和316不锈钢为试样,进行了快堆设备去污模拟试验,并在去污试验后对试样进行去污深度、微观形貌以及力学性能等分析。结果表明:304和316不锈钢最大去污深度分别可达约10μm和4μm;材料去污深度随去污温度、时间、去污剂流速的增加而增大;相同条件下,304不锈钢的去污深度大于316不锈钢。去污后,材料均保持较好的延伸率,抗拉强度略有降低,不影响材料的整体力学性能。以12.5 g/L硫酸和30 g/L磷酸的混合酸一步法去污作为快堆粘钠设备的去污法具有操作简单、去污快、产生废液量少的特点,说明该混合酸是一种高效去污剂。The decontamination simulation tests were performed in dynamic decontamination loop to choose the suitable decontamination condition for fast reactor components with sodium.In the tests,304 SS and 316 SS were used as sample which were exposed in sodium for 3700 h at 530℃.A solution of 12.5 g/L of sulfuric acid and 30 g/L of phosphoric acid was chosen as one-step decontamination solution.The measurement and analysis for decontamination depth,micro morphology and mechanical property were performed after test.The decontamination depth of 304 SS and 316 SS can reach about 10μm and 4μm respectively,and increases with temperature,time and flow rate.With the characteristic of simple operation,fast decontamination rate and little waste solution,the sulfuric-phosphoric acid is a high effective decontamination solution for fast reactor components with sodium.

关 键 词：快堆 粘钠设备 不锈钢 去污 动态模拟试验 

分 类 号：TL944[核科学技术—辐射防护及环境保护]