Distillation and stripping pilot plants for the JUNO neutrino detector: design, operations and reliability
Abstract
This paper describes the design, construction principles and operations of the distillation and stripping pilot plants tested at the Daya Bay Neutrino Laboratory, with the perspective to adapt this processes, system cleanliness and leak-tightness to the final full scale plants that will be used for the purification of the liquid scintillator used in the JUNO neutrino detector. The main goal of these plants is to remove radio impurities from the liquid scintillator while increasing its optical attenuation length. Purification of liquid scintillator will be performed with a system combining alumina oxide, distillation, water extraction and steam (or N2 gas) stripping. Such a combined system will aim at obtaining a total attenuation length greater than 20 m at 430 nm, and a bulk radiopurity for 238U and 232Th in the 10-15 to 10-17 g/g range. The pilot plants commissioning and operation have also provided valuable information on the degree of reliability of their main components, which will be particularly useful for the design of the final full scale purification equipment for the JUNO liquid scintillator. This paper describe two of the five pilot plants since the Alumina Column, Fluor mixing and the Water Extraction plants are in charge of the Chinese part of the collaboration.
Keywords
Cite
@article{arxiv.1902.05288,
title = {Distillation and stripping pilot plants for the JUNO neutrino detector: design, operations and reliability},
author = {P. Lombardi and M. Montuschi and A. Formozov and A. Brigatti and S. Parmeggiano and R. Pompilio and W. Depnering and S. Franke and R. Gaigher and J. Joutsenvaara and A. Mengucci and E. Meroni and H. Steiger and F. Mantovani and G. Ranucci and G. Andronico and V. Antonelli and M. Baldoncini and M. Bellato and E. Bernieri and R. Brugnera and A. Budano and M. Buscemi and S. Bussino and R. Caruso and D. Chiesa and C. Clementi and D. Corti and F. Dal Corso and X. F. Ding and S. Dusini and A. Fabbri and G. Fiorentini and R. Ford and G. Galet and A. Garfagnini and M. Giammarchi and A. Giaz and M. Grassi and A. Insolia and R. Isocrate and I. Lippi and Y. Malyshkin and S. M. Mari and F. Marini and C. Martellini and A. Martini and M. Mezzetto and L. Miramonti and S. Monforte and P. Montini and M. Nastasi and F. Ortica and A. Paoloni and D. Pedretti and N. Pelliccia and E. Previtali and A. C. Re and B. Ricci and D. Riondino and A. Romani and P. Saggese and G. Salamanna and F. H. Sawy and G. Settanta and M. Sisti and C. Sirignano and L. Stanco and V. Strati and G. Verde and L. Votano},
journal= {arXiv preprint arXiv:1902.05288},
year = {2019}
}