Bewertung des Thermoselect-Verfahrens Dezember 1994 Schlussbericht

Anhand des Betriebes der Demonstrationsanlage Fondotoce wird die Prozessrealisierbarkeit des Thermoselectverfahrens beurteilt. Die Anlage wird zunaechst beschrieben und das Messprogramm wird validiert. Anschliessend werden die Messergebnisse dargestellt. Beschrieben werden Anlagenverhalten, Stoffstroeme und Massenbilanz, Energiebilanz und Schadstoffstroeme. (SR)On the basis of the operation of the Fondotoce pilot plant, the process feasibility of the Thermoselect process is assessed. First of all, the plant is described and the measuring programm validated. Then the measurement results are reported. They cover the following: behaviour of the plant, streams of substances and mass balance, energy balance, and streams of pollutants. (SR)SIGLEAvailable from TIB Hannover: F95B1473 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekUmweltministerium des Landes Baden-Wuerttemberg, Stuttgart (Germany)DEGerman

Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector

To maximize the light yield of the liquid scintillator (LS) for the Jiangmen Underground Neutrino Observatory (JUNO), a 20 t LS sample was produced in a pilot plant at Daya Bay. The optical properties of the new LS in various compositions were studied by replacing the gadolinium-loaded LS in one antineutrino detector. The concentrations of the fluor, PPO, and the wavelength shifter, bis-MSB, were increased in 12 steps from 0.5 g/L and <0.01 mg/L to 4 g/L and 13 mg/L, respectively. The numbers of total detected photoelectrons suggest that, with the optically purified solvent, the bis-MSB concentration does not need to be more than 4 mg/L. To bridge the one order of magnitude in the detector size difference between Daya Bay and JUNO, the Daya Bay data were used to tune the parameters of a newly developed optical model. Then, the model and tuned parameters were used in the JUNO simulation. This enabled to determine the optimal composition for the JUNO LS: purified solvent LAB with 2.5 g/L PPO, and 1 to 4 mg/L bis-MSB