Power storm last night tripped all 3 turbos and a couple of aux carts. Pressure rose up to about 2.1x10-04 Torr, noted on the attached plot.
As I was doing recovery work on the output mode cleaner tube turbo pump, I had just closed the main isolation valve and "reset" the box, I was taking a photo of the as found when we had the 6:01 am power glitch.
I returned to HAM1 SS-500 to check the system, it tripped, and I recovered pumping on the SS-500 system and HAM1 turbo. Moved back to the OMT turbo pumps system, by now the main isolation valve was closed, restarted the different components and spun up the turbo pump, while this one reached "normal" speed I moved to the other two turbo stations, and repeated the process, soon we had all three turbos back up.
The aux carts were restarted for BSC1 AIP, GV5 AIP, and HAM3 AIP.
The Kobelco compressor made it back on its own, but the dryer tower did not, I restarted it and visually checked the dew point, it was good, reported by the dryer at -63 oC.
Attached is a plot of the pumpdown for HAM1 and the corner via PT180 signal from BSC8.
Also I have attached a video capture of the power outage, on the video you can hear the solenoid valves closing for OMT turbo station and other items.
Update on annulus systems affected by the vent.
Chambers:
HAM1, fully recovered no issues to report.
HAM2, system is having issues maintaining pressure, may need a new ion pump.
HAM3, fully recovered no issues to report.
HAM7, its chamber remains under construction.
BSC1, system is having issues keeping pressure down, we need to go and take a look at the bolts on the door that was removed.
BSC2, system is having issues keeping pressure down, we need to go and take a look at the bolts on the dome.
Large gate valves:
GV1, at nominal.
GV2, system needs to be pumped down.
GV5, system was pumped down and it seems to be doing good, metal valve needs to be closed before opening gate valve.
GV6, at nominal.
GV7, at nominal, same as GV2, need to pump down annulus.
GV8, at nominal.
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