一种钠钾合金自动阻塞计的实验研究  

Experimental Study on NaK Alloy Automatic Plugging Meter

作　　者：王泽鸣 柴宝华[1] 龙俞伊 冯波[1] 韩冶[1] WANG Zeming;CHAI Baohua;LONG Yuyi;FENG Bo;HAN Ye(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核科学与工程》2022年第5期1053-1058,共6页Nuclear Science and Engineering

摘　　要：阻塞计可以在液态金属工质充装前和系统运行期间实现非金属杂质含量的定量测量和实时监测,目前我国仅开展了钠阻塞计的相关实验研究工作,为满足钠钾合金系统的杂质测量需求,本文分析了阻塞孔内的流动特性和杂质的析出过程,总结出了阻塞孔的设计理论依据,并引入响应滞后系数,完成了钠钾合金自动阻塞计工程样机的设计制造,在高温电磁泵回路上完成了该阻塞计的实验研究,对照冷阱的运行温度验证了阻塞温度的准确性,研究还表明本台阻塞具有较好的工作稳定性,阻塞温度的随机误差不超过1%。此后通过测量实验独立分析了流速和降温速率对阻塞温度的影响,建议阻塞孔内流速大于0.7 m/s,降温速率在1.5~2.5℃/min。Plugging meter can realize the quantitative measurement and real-time monitoring of non-metallic impurity content before filling liquid metal working medium and during system operation.At present,related research work of sodium plugging meter has been carried out in China,to meet the impurity measurement requirement of the NaK alloy system,the flow characteristics and impurity precipitation process in the plugging holes are analyzed in this paper,and the theoretical basis for the design of plugging holes is summarized.Furthermore,the response lag coefficient is introduced.The plugging meter is tested on the ATC-R electromagnetic pump circuit after manufacturing.Accuracy of the plugging temperature is proofed by comparing with the cold trap operate temperature.The results also show that the plugging temperature has good stability and the random error is no more than 1%.Finally,the flow rate through plugging holes is suggested to be above 0.7 m/s,while the cooling rate should be within 1.5~2.5℃/min by experimental research and analysis.

关 键 词：自动阻塞计 钠钾合金 非金属杂质 

分 类 号：TL341[核科学技术—核技术及应用]