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 these processes, system cleanliness and leak-tightness standards to the final full scale plants to be used for the purification of the liquid scintillator of 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 N(2)gas) stripping. Such a combined system will aim at obtaining a total attenuation length greater than 20 m @430 nm, and a bulk radiopurity for (238)Uand(232)Th in the 10(-15)divided by 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 describes two of the five pilot plants since the Alumina Column, fluorescent material mixing and the Water Extraction plants are being developed by the Chinese part of the collaboration.

Distillation and stripping pilot plants for the JUNO neutrino detector: Design, operations and reliability

Montuschi, M.
Secondo
;
Mantovani, F.;Baldoncini, M.;Fiorentini, G.;Ricci, B.;Strati, V.;
2019

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 these processes, system cleanliness and leak-tightness standards to the final full scale plants to be used for the purification of the liquid scintillator of 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 N(2)gas) stripping. Such a combined system will aim at obtaining a total attenuation length greater than 20 m @430 nm, and a bulk radiopurity for (238)Uand(232)Th in the 10(-15)divided by 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 describes two of the five pilot plants since the Alumina Column, fluorescent material mixing and the Water Extraction plants are being developed by the Chinese part of the collaboration.
Lombardi, P.; Montuschi, M.; Formozov, A.; Brigatti, A.; Parmeggiano, S.; Pompilio, R.; Depnering, W.; Franke, S.; Gaigher, R.; Joutsenvaara, J.; Mengucci, A.; Meroni, E.; Steiger, H.; Mantovani, F.; Ranucci, G.; Andronico, G.; Antonelli, V.; Baldoncini, M.; Bellato, M.; Bernier, E.; Brugnera, R.; Budano, A.; Buscemi, M.; Bussino, S.; Caruso, R.; Chiesa, D.; Clementi, C.; Corti, D.; Dal Corso, F.; Ding, X. F.; Dusini, S.; Fabbri, A.; Fiorentini, G.; Ford, R.; Galet, G.; Garfagnini, A.; Giammarchi, M.; Giaz, A.; Grassi, M.; Insolia, A.; Isocrate, R.; Lippi, I.; Malyshkin, Y.; Mari, S. M.; Marini, F.; Martellini, C.; Martini, A.; Mezzetto, M.; Miramonti, L.; Monforte, S.; Montini, P.; Nastasi, M.; Ortica, F.; Paoloni, A.; Pedretti, D.; Pelliccia, N.; Previtali, E.; Re, A. C.; Ricci, B.; Riondino, D.; Romani, A.; Saggese, P.; Salamanna, G.; Sawy, F. H.; Settanta, G.; Sisti, M.; Sirignano, C.; Stanco, L.; Strati, V.; Verde, G.; Votano, L.
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0168900219301299-am.pdf

accesso aperto

Descrizione: Post print
Tipologia: Post-print
Licenza: Creative commons
Dimensione 2.33 MB
Formato Adobe PDF
2.33 MB Adobe PDF Visualizza/Apri
1-s2.0-S0168900219301299-main.pdf

solo gestori archivio

Descrizione: Full text editoriale
Tipologia: Full text (versione editoriale)
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.67 MB
Formato Adobe PDF
1.67 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Articolo LS_v3.3.pdf

accesso aperto

Descrizione: versione preprint
Tipologia: Pre-print
Licenza: PUBBLICO - Pubblico con Copyright
Dimensione 1.22 MB
Formato Adobe PDF
1.22 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2400128
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 10
social impact