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arXiv · 2109.07317

Development of water extraction system for liquid scintillatorpurification of JUNO

Jiaxuan Ye·Jian Fang·Tao hu·Li Zhou·Wei Hu·Wanjin Liu·Yayun Ding·Mengchao Liu·Boxiang Yu·Xilei Sun·Lijun Sun·Yuguang Xie·Xiao Cai
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Abstract

The Jiangmen Underground Neutrino Observatory (JUNO) uses 20k tons of liquid scintillator (LS)to detect neutrinos. The content of radioactive substances in the liquid scintillator will affect theexperimental results. JUNO will use counter current water extraction to reduce the radioactive metalions inside the LS. In this article, The factors that affect the final water extraction like the partitioncoefficient and the factors that affect it, the optimal mass transfer droplet size, the flow rate ratio,theoretical stage and different working mode (LS as continuous phase or dispersed phase) have beenstudied. We built counter current extraction prototype in the laboratory and a pilot plant in Daya Bay.We not only study the factors above, but also get a lot of engineering experience that worth sharing.

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Jiaxuan Ye, Jian Fang, Tao hu, Li Zhou, Wei Hu, Wanjin Liu, Yayun Ding, Mengchao Liu, Boxiang Yu, Xilei Sun, Lijun Sun, Yuguang Xie, Xiao Cai. 2021-09-15. Development of water extraction system for liquid scintillatorpurification of JUNO. https://doi.org/10.1016/j.nima.2021.166251

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