用于燃料棒氦质谱检漏的多级差分真空系统设计方案研究  

Design Scheme of Multi-Stage Differential Vacuum System for Helium Mass Spectrometry Leak Detection of Fuel Rods

作　　者：张周 胡耀峰 杨佳[1] 李涛 张学粮 黄乾 鲁立[1] ZHANG Zhou;HU Yaofeng;YANG Jia;LI Tao;ZHANG Xueliang;HUANG Qian;LU Li(Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,China;CGNPC Uranium Resources Co.,Ltd.,Beijing 100209,China)

机构地区：[1]苏州热工研究院有限公司,苏州215004 [2]中广核铀业发展有限公司,北京100209

出　　处：《真空科学与技术学报》2024年第10期912-921,共10页Chinese Journal of Vacuum Science and Technology

摘　　要：用于燃料棒氦检漏的装置是燃料棒生产过程中的核心部件之一,关系到燃料棒的生产质量和核电站运行稳定。现有的检漏装置采用卧式检漏装置,将燃料棒成批放入其中进行检测,检漏效率有待提高。文章开发一种多级差分真空系统,用于燃料棒的在线通过式检漏,根据系统特点,提出了系统的设计思路和流程,通过迭代计算的方法,进行极限差分比、抽速和稳态压力计算,并对系统的参数进行分析。研究表明,该多级差分真空系统的研制是可行的,检漏室压力能维持在较低的水平,检漏响应时间较快,检漏效率优于现有设备,且系统冗余度较高,有较大的降低成本的空间。该系统能实现单根燃料棒的氦质谱检漏,为燃料棒的质量管控和溯源提供了基础。The device for helium leak detection of fuel rods is one of the core components in the production process of fuel rods,which is crucial for the production quality of fuel rods and the stable operation of nuclear power plants.The current leak detection device utilizes a horizontal testing method,where fuel rods are batched for testing,and the efficiency of leak detection needs to be improved.This paper introduces the development of a multistage differential vacuum system for online pass-through leak detection of fuel rods.Based on the system’s characteristics,the design concept and process of the system are proposed.The method involves iterative calculations for extreme differential ratio,pumping speed,and steady-state pressure calculation.The parameters of the system are then analyzed.The research shows that the development of the multi-stage differential vacuum system is feasible.The pressure of the leak detection chamber can be maintained at a low level,the response speed of leak detection is fast,the leak detection efficiency is superior to existing equipment,and the system redundancy is high,leaving greater room for cost reduction.This system can achieve helium mass spectrometry leak detection for individual fuel rods,providing a foundation for quality control and traceability of fuel rods.

关 键 词：燃料棒 氦检漏 差分真空系统 设计方案 

分 类 号：TH69[机械工程—机械制造及自动化]