PIMS IN INSTITUTE FOR NUCLEAR STUDIES Brazing Andrzej Soltan Institute for Nuclear Studies.

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Presentation transcript:

PIMS IN INSTITUTE FOR NUCLEAR STUDIES Brazing Andrzej Soltan Institute for Nuclear Studies

Furnace Diameter: 650mm Length: 2000mm Max. temperature: 1150°C Temperature flatness: ±5°C Vacuum level: better then 1x10 -6 mbar in 850°C Max weight of brazing elements: 250 kg Leak rate: 3x10 -3 mbar*l/s Ventilation: pressured nitrogen Temperature growth speed: 0÷850°C – 1h 850÷1150°C – 1h

Furnace… Control system: based on Siemens PLC controller steering with touch screen cell phone alarm system Pumping system: Based on dry pumps Low Vacuum : Root’s pump with rotary pump High Vacuum: CoolVac – cryogenic pump Pumping system manufacturer: Leybold Pumping speed Mechanical pumps: 1250m 3 /h Cryogenic pump: l/s

Leak rate detection  By Helium detector  By mass spectrometry Equipment: Varian PD03 Helium detector mobile and stationary version Parameters: Leak rate: 5x Pa*m 3 /sec Maximum test port pressure: 13 mbar Pumping speed: Combo pump (scroll and diaphragm): 3m 3 /h Turbomolecular pump: 1.8 l/s (helium) Equipment: Pfeiffer PrismaPlus Type: quadrupole Mass range: AMU Special function: leak detector for all masses of Helium Maximum test port pressure: 1x10 -4 mbar

Pumping system  Stationary  Mobile Manufacturer: Varian Type: Mobile pumping station Pumping system: dry pumps Turbomolecular pump: Turbo V-301 Scroll pump: SH110 Vacuum gauge full range: FRG-700 Manufacturer: Varian Type: TPS-compact Pumping system: dry pumps Turbomolecular pump: Turbo V-81 Scroll pump: IDP-3 Vacuum gauge full range: FRG-700

Questions  Water pressure test: for a clean level would it be better to use a pressured gas (helium)?  Cleaning before brazing: cleaning, maybe electropolishing (especially before nickel-plating)?