SABRE PoP Fluid Handling Sabre General Meeting – October 3, 2017 Antonio Di Ludovico

“Fluid” list Scintillator Gas Nitrogen (GN2) Exhaust gas Water Pseudocumene (PC) + 3 g/l PPO Gas Nitrogen (GN2) Regular grade GN2 (RN) High purity GN2 (HPN) Exhaust gas Water

Scintillator plant Borexino scintillator system SABRE PoP part Informal agreement with BX Collaboration

Plants Scintillator pipe lines from Borexino plant Hall C

SABRE PoP Fluid handling: P&ID Veto pipe lines

Veto vessel filling/emptying line Scintillator prepared in Borexino plant PC+PPO stored in EPN tank Filling the SABRE vessel will be connected to the existing and extended BX line (previous CTF filling line) by a flexible hose (3/4 inch.) a BX pump will be used for the SABRE vessel filling Emptying the vessel will be connected by a flexible hose to the extended line (3/4 inch.) a new Sabre diaphragme pump has to be installed

Veto vessel expansion volume PC volumetric dilatation: 1.2⋅10-3 °C-1 PC density: 0.8758 g/cm3 Installed to contain the pressure variations Assuming to have a ~ 5 °C maximum variation expected scintillator variation V~ 10 liters Vessel capacity ~ 30 liters Stainless steel double walled vessel Monitoring instruments  control system slide Vessel blanketing: ~ 5 mbar HPGN2

SABRE PoP Fluid handling: P&ID Regular N2 pipe lines

Regular Gas Nitrogen (RN) Pipe Lines Quality: Linde 5.0  water content <5 (ppm vol) Source: standard grade liquid nitrogen from Linde Connection to Bx pipe line (evaporated by BX Linde LN2 tank) to be agreed Sabre line  pipe line to be realized, LN2 tank position to be assigned (LNGS) Two stainless steel lines: Flushing Radon box (1/2 inch.)  1 m3/h Veto PMTs cans (1/4 inch.)  10 l/h Line pressure set by pressure regulator at about 10 mbar Gas flow regulated by needle valves plus flow indicators Pipes fittings: Swagelok type (maximum leak rate of 4x10-7 mbar l /s)

SABRE PoP Fluid handling: P&ID High Purity N2 pipe lines

High Purity Gas Nitrogen (HPN) Pipe Lines Quality: Linde 5.0 Low Radon  222Rn concentration reduced by approximately a factor of 100 respect to the RN Source: to be defined (BX pipe line or new one to be built) Two stainless steel lines: Expansion vessel blanketing line (1/4 inch.)~ 10 liters/h Crystal Enclosure and Copper tube flushing line (1/4 inch.) 20 liters/h Lines pressure set by pressure regulator at about 5 mbar Gas flow regulated by needle valves plus flow indicators Pipes fittings: Swagelok or VCR type (maximum leak of 4x10-9 or 4x10-11 mbar l /s depending on the type used)

SABRE PoP Fluid handling: P&ID Exhaust pipe line and charcoal system

Exhaust Line Main pipe to collect and vent the waste nitrogen coming from: Expansion Vessel blanketing Radon box PMT cans Enclosure & Copper Tube 1 inch. stainless steel pipe Pipe fitting: Swagelok Check valves installed to prevent back flow Waste nitrogen threated through a charcoal system before the release into the car tunnel Gas flow through the charcoal filter ensured by a blower

Water plant Filling of shielding tanks: Temporary line with pvc hose pipe Water needed: about 30 m3 Quality of water? deionized water from Borexino water plant Raw water from the underground water supply Deionized water depending on the agreement with BX Collaboration Drain: to be compliant with Environment Protocol  to finally define Temporary drain plant: pvc hose pipe, tank and diaphgram pump

Control systems instrumentation Expansion vessel: LT level transmitter PT pressure transmitter PC Vapor detector Charcoal system Radon Box Pressure transmitter PC Vapor detector Fluid detectorcatch basin Temperature trasmiter PMT cans flushing system

Safety system

Conclusions The PI&D showed is the the last one approved the LNGS (informally) It could be modified in relation to the the following open questions: Possibility to use the Borexino utilities (RN2, HPN2 and HPW) HPN2 or RN2 Maximum humidity value allowed for Crystal nitrogen flushing

Thank you!