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From: "Yip, Kin" <kinyip AT bnl.gov>
To: "sphenix-magnet-l AT lists.bnl.gov" <sphenix-magnet-l AT lists.bnl.gov>
Subject: [[Sphenix-magnet-l] ] ps flow 13 caused the magnet to trip ... Water Group flowing acid ... back
Date: Fri, 13 Sep 2024 22:31:16 +0000

Hi,

The Magnet tripped at 9:54 am due to “PS water flow 13” (there are 15 of them for the power supply, in addition to the two for water-cooled-buses plus another one near the dump resistor).
The C-AD Water Group has found that the water flow to be low (for this "PS water flow 13"), ~0.35 gpm compared to 0.75 gpm. Pressure-flushing with CO2 didn’t help. At the end, they (3 techs from the Water Group) used acid to clean all 15 of these flow pipes. It worked ! The flow went back to >~ 0.75 gpm.
I started to ramp up the magnet ~1:33 pm and the magnet was returned to top current at 3:22 pm.

Kin

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[[Sphenix-magnet-l] ] ps flow 13 caused the magnet to trip ... Water Group flowing acid ... back, Yip, Kin, 09/13/2024