一种核电用罐体液位测量密度补偿方案的研究  

Research on the compensated differential pressure level measurement for the tanks of nuclear power plants

作　　者：叶腾达 吴雪琼 顾晴雯 邹明伟 YE Tengda;WU Xueqiong;GU Qingwen;ZHOU Mingwei(Shanghai Nuclear Engineering Research&Design Institute,Shanghai 200000,China;Chongqing Chuanyi Automation Co.,Ltd.,Chongqing 400000,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200000 [2]重庆川仪自动化股份有限公司,重庆400000

出　　处：《自动化与仪器仪表》2020年第12期107-110,114,共5页Automation & Instrumentation

摘　　要：在三代核电堆型设计中,1E级差压变送器被广泛应用于大型核级设备的液位测量。但由于设备内部的工艺工况较为复杂,经常出现被测介质密度变化波动剧烈的情况,从而导致使用差压法液位测量误差较大。设计方一般通过引入密度补偿方案来减小测量误差,但常规的密度补偿方案存在一定局限性,无法完全满足测量需要。介绍一种新型的差压法密度补偿方案,并提供其数学模型,再从原理、适用性等方面对该方案进行讨论和分析,举例给出采用此方法前后的液位测量不确定度对比。最后,比较新方案和现有方案的优缺点并进行总结。Class 1 E differential pressure transmitters are widely used in measuring level of nuclear safety class tanks in the third generation nuclear power plants.Because of the hard change in the density of the tested medium and the complex thermal-hydraulic operation of the tank,which cause a large measurement error.It is necessary to use the compensated density plan to decrease the measurement error.Nevertheless the commonly compensated density plan cannot fully meet the measurement needs.A new compensated density plan is presented in this artide,and its mathematical model is provided.Its theory and applicability and the uncertainly results before and after using this plan are discussed and analyzed.Finally,the merits and demerits are compared between the new project and the existing one.

关 键 词：差压变送器 密度补偿 1E级 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]