The following tasks were completed in preparation of re-filling the T1 and T2 cooling packages:
- All valves were returned to the 'open' configuration (note, compressed air to collimators at T1 is to remain closed - rotating collimator no longer in use || also note, odd handle configuration at T1 panel when all valves are open - see attached).
- Leaks from valves were checked, two leakly valves found at T2 (Swagelok SS-44S6 and SS-45S12), the stem of these valves were re-tightened and leaks were remedied (see picures).
- Spent CUNO filters in buckets were dealt with: water drained to MH HC active sink, and filters organized into a single 'dry' bucket.
The cooling packages will be filled to 38 cm at the expansion tank tomorrow, and the pumps turned on to check for leaks at pressure, at which point this ELOG will be updated.
UPDATE:
The cooling packages were filled on Jan 16 to ~38 cm, after which both pumps were turned on and a few more leaky valves were identified at the T2 station (none at T1).
We remedied the leaks by tightening their stems and will continue to monitor both systems for a few days.
Besides the leak, we found that the TGT:OUT pressure gage was incorrectly reading 0 psi. We will be entering the 1A tunnels to drain the 1A holding tank soon, at which point we will look to remedy this issue (either a valve was left closed, or an air column is trapped at the gage port).
UPDATE (30 Jan, 2024): TGT:OUT pressure transducer at T1 was successfully replaced and is now reading the correct pressure (see image, ~20 psi is about the same as readings from 2021 when the sensor was working properly).
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