An SF6 accumulation leak test system for JUNO's underwater electronics boxes reaches a detection limit of about 2.4e-9 Pa m3/s and passed 203 boxes before installation.
Leakage Tests of the Stainless Steel Vessels of the Antineutrino Detectors in the Daya Bay Reactor Neutrino Experiment
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abstract
The antineutrino detectors in the Daya Bay reactor neutrino experiment are liquid scintillator detectors designed to detect low energy particles from antineutrino interactions with high efficiency and low backgrounds. Since the antineutrino detector will be installed in a water Cherenkov cosmic ray veto detector and will run for 3 to 5 years, ensuring water tightness is critical to the successful operation of the antineutrino detectors. We choose a special method to seal the detector. Three leak checking methods have been employed to ensure the seal quality. This paper will describe the sealing method and leak testing results.
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A highly sensitive SF$_6$-based leak test system for JUNO 3-inch PMT underwater electronics boxes
An SF6 accumulation leak test system for JUNO's underwater electronics boxes reaches a detection limit of about 2.4e-9 Pa m3/s and passed 203 boxes before installation.