 Monday, February 02, 2015, 16:06, Isaac Earle, Maintenance, Target 2, Cooling, T2 MRO Status
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- T2-MK2 target (currently in the T2 monolith) purged with air
- All cooling package reservoir o-rings changed |
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Wednesday, March 04, 2015, 18:08, Isaac Earle, Repair, Target 2, Cooling, T2 Cooling Package MRO Update
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The following work was done today at the T2 cooling package:
- Remainder of #4 Hansen o-rings replaced (see E-log from Jan 30, 2015)
- Installed the following ball valves which have been rebuilt & tested with 100psi air: target outlet 3/4" (x2), resin can outlet filter |
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Tuesday, March 31, 2015, 17:40, Isaac Earle, Repair, Target 2, Cooling, T2 Thermistors Replaced
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The Inlet (T1), Outlet (T2), Col.A (T6), and Col. B (T7) thermistors at the T2 cooling package all gave intermittent faulty readings at various times
between Oct - Dec 2014. It is suspected that this was caused by a water leak in the area causing the terminals to get wet. Inspection of the
sensors revealed that they are in poor shape and that the readouts sometimes fluctuate when the probe or connectors are handled. All four thermistor |
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Wednesday, April 22, 2015, 15:15, Isaac Earle, Standard Operation, Target 1, Cooling, T1 and T2 Cooling Packages Ready
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Both cooling packages are running steadily with the targets in Position 0.
The demin flow (Q2) for both was tuned to approximately 1.5USgpm.
A defeat was applied to T2Q1 flow to prevent high level nuisance trips. This will remain in effect for the 2015 running period. |
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Wednesday, July 15, 2015, 10:33, Isaac Earle, Standard Operation, Target 1, Cooling, T1 & T2 Cooling System Check
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- All T1 and T2 values on XTPAGE were stripped back to April 1, 2015: All systems appear to be functioning normally, nothing unusual observed
- Expansion tank levels checked visually: T1 level at 1/2" above top sensor nut, T2 level at 1/4" below top sensor nut --> filled
to 1/2" above |
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Monday, January 18, 2016, 17:19, Isaac Earle, Standard Operation, Target 1, Cooling, T1 & T2 Packages Drained; BL1A Holding Tank Released
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The T1 and T2 cooling packages were drained to the BL1A holding tank on Jan 8 2016. The volumes were 100L and 80L respectively. Before
starting there was 350L of water in the holding tank from the 500MeV system which Steve Sapriken drained in September 2015. The T1 and T2 systems
were sampled and delivered to RPG. After receiving permission from RPG to release all 3 portions of water it was pumped into the city sewer on Jan |
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Monday, January 25, 2016, 16:54, Isaac Earle, Maintenance, Target 1, Cooling, T1 MRO Work
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The following work was performed at the T1 cooling package and target between January 18-21, 2016:
- Cuno water filters removed (3), and new filters installed
- Target water solenoid, H.E. secondary side solenoid, and Collimator A solenoids removed and replaced with new 24V DC versions |
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Wednesday, February 03, 2016, 17:35, Isaac Earle, Standard Operation, Target 2, Cooling, T2 MRO Work
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The following work was performed at the T2 cooling package and target between Jan 25 - Feb 3, 2016:
- Cuno water filters removed (2), and new filters installed
- Target water solenoid, H.E. secondary side solenoid, Collimator A solenoid, and Collimator B solenoids removed and replaced with new 24V DC versions |
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Friday, September 30, 2016, 16:59, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling System Inlet Pressure Transducer Replaced
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The T1 cooling system inlet pressure transducer (EPICS ID: B1A:T1CS:PGIN, Omega part # PX315-100GI) began failing in August (exhibited gradual
decline in pressure with no corresponding change to flow rate or outlet pressure). A new transducer was installed on Sept 30 2016 which fixed the
problem. Cyclotron Fault Report #9238 was returned and the temporary bypass on the warning level was removed. |
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Thursday, November 17, 2016, 17:58, Isaac Earle, Repair, Target 2, Cooling, T2 Heat Exchanger Secondary Side Solenoid Valve Failure
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At approximately 11am today the T2 cooling package heat exchanger secondary side water flow suddenly dropped from ~11gpm to 0. This was confirmed
to be a real reading by observing that with no secondary cooling both the inlet and outlet target water temperatures rose steadily with beam on the target.
While standing on the blocks in the T2 area and having a controls expert (wither "superuser" access mode) actuate the secondary side solenoid |
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Thursday, January 19, 2017, 08:55, Isaac Earle, Standard Operation, Target 1, Cooling, T1 MRO work complete
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The following work was completed on the T1 cooling package:
- water drained to BL1A holding tank
- all resevoir o-rings changed |
Monday, March 27, 2017, 16:15, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling System Target Water Return Hose Damaged 
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The 18' shielding block which lies west of the T1 cooling package was removed on Friday Mar 24 so that vacuum equipment could be craned into the 1A tunnel.
During replacement, the flexible SS hose for T1 target return water got caught under the block and was ripped apart. Workers in the area did
not realize this had occurred. The cooling package tripped off when the hose ripped (likely due to low water flow or low supply pressure). In |
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Tuesday, April 11, 2017, 17:02, Isaac Earle, Maintenance, Target 2, Cooling, T2 Cooling System MRO
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The following work has been completed on the T2 cooling package:
- T2 system drained to South TNF holding tank (completed in Jan 2017, water already released)
- Target water and demin. circuit Cuno filters changed |
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Tuesday, May 09, 2017, 16:35, Isaac Earle, Repair, Target 2, Cooling, T2 target water flow gauge paddle wheel changed
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During the target move on Thursday May 4th the paddle wheel and paddle wheel shaft for the T2CS:FGTGT sensor were changed to address transient
spikes of approximately +/-1.0 gpm which were causing nuisance trips. There have been no transient spikes recorded since the change, and the nominal
flow value dropped from 4.9gpm to 3.6gpm. Fault report #9836 has been returned, and the warning and trip levels, which were set higher to avoid nuisance |
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Tuesday, July 25, 2017, 19:23, Isaac Earle, Repair, Target 2, Cooling, T2 Heat Exchanger Secondary Side Solenoid Valve Failure (again)
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At approximately 13:50 today the T2 cooling system secondary side solenoid valve (T2CS:SVSEC) failed to a closed position. This was the same
location where the valve failed on July 10th (E-Log #224), and also in Nov 2016 (E-Log #211). This repeated failure does not seem like a coincidence,
so instead of replacing the valve with a new unit, it was bypassed temporarily until we can determine the cause of the failures. A 3/4" FNPT |
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Thursday, July 27, 2017, 08:57, Isaac Earle, Other, Target 2, Cooling, Failed T2CS:SVSEC valves investigation
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The three failed T2 cooling system secondary side solenoid valves were tested yesterday to try to determine the problem. The test steps are
detailed below:
New spare valve (NSV) produced audible "click" and valve was seen to physically open when 24V DC driving voltage was applied
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Thursday, October 26, 2017, 16:12, Isaac Earle, Repair, Target 1, Cooling, T1 collimator solenoid valve replaced
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Around 10pm on Sunday Oct 22 beam was tripped multiple times due to low flow for the T1 collimator cooling circuit (B1A:T1:FGCOL). Temperature
of the collimator (TC7COL, TC8COL) was monitored with reduced beam current and no increase was observed leading to the conclusion that flow was OK and
the flow gauge was faulty. Normal operation continued until around 1:30am on Oct 26 when the collimator thermocouples both rose quickly, causing |
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Tuesday, April 10, 2018, 11:20, Isaac Earle, Maintenance, Other, Cooling, T1 and T2 cooling package shutdown MRO work
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The following work was performed on the T1 and T2 cooling packages during the 2018 shutdown:
- T1 and T2 cooling packages both sampled and drained to South TNF holding tank
- Water released after testing and approval from RPG |
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Friday, June 01, 2018, 17:50, Isaac Earle, Repair, Target 1, Cooling, T1 collimator solenoid valve coil replaced
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Flow stopped through the T1 collimator cooling loop around the same time as a power bump this afternoon. The problem was narrowed down to failed
solenoid valve B1A:T1:SVCOL by comparing coil resistance to other units without issue (~1.0ohm vs 3.6ohm for working units), measured at the T1/T2 PLC
cabinet. Shielding above the T1 package was removed and the solenoid coil was replaced with a new unit. After replacement the valve works as |
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Tuesday, July 03, 2018, 11:09, Isaac Earle, Repair, Target 1, Cooling, T1 cooling package outlet water pressure sensor replaced
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The T1 cooling package outlet water pressure sensor (B1A:T1CS:PGOUT) was replaced this morning with a new unit. Over the last few months
the sensor readout had been steadily decreasing (from around 20psi to 4psi) with no corresponding decrease in inlet pressure, and no change in the circuit
flowrate (this is how these pressure sensors typically fail). |
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