10-12 April 2013
INFN - Laboratori Nazionali del Gran Sasso
Europe/Rome timezone

Water Purification in Borexino

12 Apr 2013, 10:55
20m
E. Fermi auditorium (INFN - Laboratori Nazionali del Gran Sasso)

E. Fermi auditorium

INFN - Laboratori Nazionali del Gran Sasso

SS 17 bis, km 18 + 910, 67100 Assergi (AQ), Italy
oral presentation Low background purification and growth techniques for liquids and solids Session 7: Low background purification and growth techniques for liquids and solids

Speaker

Marco Giulio Giammarchi (MI)

Description

Water is used in the Borexino Solar Neutrino Experiment as a shielding against external gamma radiation, as well as a medium to be used in purification processes and cleaning of various part of the equipment. The Borexino Water Purification System uses normal fresh Water (10^-3 Bq/kg of U-238,Th-232,K-40, 0.3 Bq/kg of Ra-226 and 10 Bq/kg of Rn-222) and makes use of various purification processes to impove radiopurity. Reverse Osmosis, Ultrafiltration, Continuous Deionization and Ga Stripping are used to improve purity. The final results in term of radioactivity removal are of a factor of 1000 for U,Th,K, about five orders of magnitude for Ra-226 and six orders of magnitude for Rn-222

Primary author

Co-authors

Andrea Ianni (Princeton University) Augusto Goretti (Princeton University) Lino Miramonti (MI) Luca Ioannucci (LNGS) Marco Balata (LNGS) Stefano Nisi (LNGS)

Presentation Materials

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