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

2. “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

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

4. Plants
Scintillator pipe lines from Borexino plant
Hall C

5. SABRE PoP Fluid handling: P&ID
Veto pipe lines

6. 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

7. Veto vessel expansion volume
PC volumetric dilatation: 1.2⋅10-3 °C-1
PC density: 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

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

9. 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)

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

11. 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)

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

13. 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

14. 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

15. 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

16. Safety system

17. 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

18. Thank you!