Liquid Handling of the JUNO Experiment
Liquid Handling of the JUNO Experiment
Li, Mr. Jiajun Heng, Prof. Yuekun Wu, Dr. Zhi Ling, Dr. Jiajie 1Tang, Mrs. Xiao Guo, Dr. Cong 2Liu, Prof. Jinchang 3Luo, Dr. Xiaolan Cai, Dr. Xiao Yang, Mr. Chengfeng 4Ma, Prof. Xiaoyan Qian, Dr. Xiaohui Huang, Mr. Tao Wu, Mr. Bi Yang, Mr. Pengfei Zhang, Mr. Shiqi Yue, Dr. Baobiao Li, Dr. Shuaijie Yang, Prof. Lei Ye, Prof. Mei Liu, Mr. Shenghui
作者信息
- 1. Sun Yat-Sen University
- 2. Chinese Academy of Sciences Institute of High Energy Physics
- 3. Institute of High Energy Physics Chinese Academy of Sciences
- 4. Sun Yat-Sen University School of Physics
- 折叠
摘要
The Filling, Overflow, and Circulation (FOC) system is a critical subsystem of the Jiangmen Underground Neutrino Observatory (JUNO), responsible for the safe handling of the Liquid Scintillator (LS) and water throughout the detector's commissioning and operational lifetime. This paper details the design and operation of the FOC system, which accomplished the filling of the world's largest LS detector—taking 45 days for water (6.4×104 m3) and 200 days for LS (2.3×104 m3). Throughout water filling, the liquid level difference between the Central Detector and Water Pool was rigorously maintained within safety limits. During LS filling, level control achieved ±2 cm precision with flow regulation within ±0.5% of setpoints. An automated control system based on Programmable Logic Controllers and the Experimental Physics and Industrial Control System framework ensured reliable operation. The system preserved LS radiopurity, maintaining 222Rn below 1 mBq/m3 during filling and achieving 238U/232Th concentrations below 10-16 g/g. The successful commissioning and operation of the FOC system have established it as an indispensable foundation for the stable long-term operation of the JUNO detector.
Abstract
The Filling, Overflow, and Circulation (FOC) system is a critical subsystem of the Jiangmen Underground Neutrino Observatory (JUNO), responsible for the safe handling of the Liquid Scintillator (LS) and water throughout the detector's commissioning and operational lifetime. This paper details the design and operation of the FOC system, which accomplished the filling of the world's largest LS detectortaking 45 days for water (6.4104 m3) and 200 days for LS (2.3104 m3). Throughout water filling, the liquid level difference between the Central Detector and Water Pool was rigorously maintained within safety limits. During LS filling, level control achieved 2 cm precision with flow regulation within 0.5% of setpoints. An automated control system based on Programmable Logic Controllers and the Experimental Physics and Industrial Control System framework ensured reliable operation. The system preserved LS radiopurity, maintaining 222Rn below 1 mBq/m3 during filling and achieving 238U/232Th concentrations below 10-16 g/g. The successful commissioning and operation of the FOC system have established it as an indispensable foundation for the stable long-term operation of the JUNO detector.关键词
Data acquisition and control system (DACS)/Instrumentation and control (I&C)/Nuclear reactor引用本文复制引用
Li, Mr. Jiajun,Heng, Prof. Yuekun,Wu, Dr. Zhi,Ling, Dr. Jiajie,Tang, Mrs. Xiao,Guo, Dr. Cong,Liu, Prof. Jinchang,Luo, Dr. Xiaolan,Cai, Dr. Xiao,Yang, Mr. Chengfeng,Ma, Prof. Xiaoyan,Qian, Dr. Xiaohui,Huang, Mr. Tao,Wu, Mr. Bi,Yang, Mr. Pengfei,Zhang, Mr. Shiqi,Yue, Dr. Baobiao,Li, Dr. Shuaijie,Yang, Prof. Lei,Ye, Prof. Mei,Liu, Mr. Shenghui.Liquid Handling of the JUNO Experiment[EB/OL].(2026-03-09)[2026-03-13].https://chinaxiv.org/abs/202603.00046.学科分类
核反应堆工程/原子能技术应用/热工量测、热工自动控制
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