6533b873fe1ef96bd12d4e6e
RESEARCH PRODUCT
Distillation and stripping pilot plants for the JUNO neutrino detector: Design, operations and reliability
D. CortiAndrea FabbriGiuseppe VerdeS. BussinoH. SteigerR. PompilioYury MalyshkinL. VotanoE. BernierNicomede PellicciaR. BrugneraAldo RomaniA. MengucciLino MiramontiAugusto BrigattiE. MeroniFilippo MariniSalvatore MonforteChiara SirignanoMonica SistiMonica SistiAndrey FormozovGioacchino RanucciMarco GrassiD. RiondinoAgnese GiazDavide ChiesaDavide ChiesaA. GarfagniniAlessandra ReR. GaigherPaolo MontiniCatia ClementiEzio PrevitaliEzio PrevitaliMassimiliano NastasiMassimiliano NastasiS. ParmeggianoBarbara RicciFabio MantovaniR. J. FordMarco GiammarchiRossella CarusoGiuseppe SalamannaMario BuscemiP. SaggeseG. GaletIvano LippiAntonio BudanoGiovanni FiorentiniF. Dal CorsoWilfried DepneringFausto OrticaCristina MartelliniS. FrankeJari JoutsenvaaraGiulio SettantaStefano Maria MariVito AntonelliRoberto IsocrateVirginia StratiG. AndronicoPaolo LombardiAlessandro PaoloniAgnese MartiniFatma SawyLuca StancoM. MontuschiD. PedrettiXuefeng DingA. InsoliaM. MezzettoMarica BaldonciniM. BellatoS. Dusinisubject
Large-scale experimentNuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsLiquid scintillatorAttenuation length; LAB; Large-scale experiments; Light yield; Liquid scintillator; Nitrogen purging; Radiopurity; Scintillator transparency; Nuclear and High Energy Physics; Instrumentationscintillation counter: liquidMixing (process engineering)Full scaleFOS: Physical sciencesRadiopurityfabricationScintillator01 natural sciences7. Clean energyStripping (fiber)law.inventionNOlaw0103 physical sciencesthorium: admixtureAttenuation length; LAB; Large-scale experiments; Light yield; Liquid scintillator; Nitrogen purging; Radiopurity; Scintillator transparency[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsProcess engineeringDistillationInstrumentationbackground: radioactivityNuclear and High Energy PhysicPhysicsLABJUNOLarge-scale experiments010308 nuclear & particles physicsbusiness.industryuranium: admixtureSettore FIS/01 - Fisica SperimentaleAttenuation lengthInstrumentation and Detectors (physics.ins-det)Attenuation lengthNitrogen purgingNeutrino detectorScintillator transparencyNeutrinobusinessaluminum: oxygenLight yielddescription
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 238U and 232Th in the 10−15 ÷ 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-05-01 |