 Thursday, October 16, 2014, 17:44, Ron Kuramoto, Repair, Target 2, Water Leak, 1A Tunnel T2 Cu-ALCW water leak repair 6x
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On Oct 7th,
during the Mini Shutdown, the T2 cooling package was uncovered to investigate the Cu-ALCW water leak dripping into the 1A Tunnel. |
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Thursday, November 06, 2014, 17:18, Ron Kuramoto, Repair, Target 2, Cooling, 1AT2 Collimator B, faulty Thermister water out temperature
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On 14Oct2014, the 1AT2 Collimator B water outlet temperature rose to 100o C.
Troubleshooting the T2 Collimator B water out temperature (T7) by swapping it's analog
signal in PIE box #2 with T2 Collimator A water out temperature (T6) to see if problem follows. See if unplugging T7 signal causes Safety Page SV7 1A Collimators |
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Thursday, November 06, 2014, 17:22, Ron Kuramoto, Repair, Target 2, Cooling, 1AT2, faulty Thermister water out temperture
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Summary: |
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Friday, November 14, 2014, 17:30, Isaac Earle, Repair, Target 1, Target, T1-MK1 Target Failure / T1 Target Swap
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- On Nov 13 at ~1am the BL1A vacuum went bad. The T1 and T2 volumes were isolated and pumped
on separately, the results indicated a water leak from the T1 target. The level of the expansion tank was slightly below normal at this time, but
not enough to be conclusive. The leak was confirmed at ~9am by starting the T1 cooling package which caused a dramatic vacuum spike. Approximately |
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Monday, November 17, 2014, 10:25, Isaac Earle, Repair, Target 1, Other, Amplified Air Leak In T1 Area Repaired
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While the 1A blocks over the T1 area were removed last week the opportunity was used to investigate an air leak on the amplified air system discovered
on August 11, 2014.
The leak was found to be coming from a device related to the septum polarity switch located behind (south of) the septum power supply on the 1A |
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Tuesday, December 09, 2014, 14:45, Isaac Earle, Repair, Target 1, Target, T1-MK1 Repair Status (Pos'n 1 Plug Leak)
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Between Nov 14 ~ Dec 9 the following activities took place:
- The leaky 10mm Be target at pos'n 3 was removed and plugged
- The loose protect monitor electrical conduit was secured in place using an aluminum shim |
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Wednesday, January 07, 2015, 17:27, Isaac Earle, Repair, Target 2, Water Leak, Water Leaks at T2 Cooling Package
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The T2 cooling package was visually inspected today after blocks were removed. With the cooling package off the following leaks were observed:
- Collimator A return line ball valve: ~ 2 drops / second
- Collimator B return line ball valve: ~ 1 drop / 3 seconds |
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Friday, January 23, 2015, 13:28, Isaac Earle, Repair, Target 2, Cooling, T2 Cooling Package Thermistor Defeats
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Both defeats applied to T2 cooling package thermistors were removed today (Col. B interlock was jumpered, and the target water inlet and outlet signals
had been swapped). It was confirmed that all thermistors are now wired correctly. The readback of both target water thermistors is currently
unstable. Inspection of the Lemo connectors showed that the internal plastic parts of all connectors were damaged or missing. If the T1/T2 |
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Tuesday, January 27, 2015, 17:38, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling Package 3/4" Valves Rebuilt - T1 MRO Complete
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- Both 3/4" ball valves on the T1 cooling package target water circuit were rebuilt, leak tested with house air pressure, and reinstalled
- The 3/4" ball valve on the T1 heat exchanger secondary side was replaced with a new unit
- The 3/4" needle valve on the T1 heat exchanger secondary side was rebuilt, leak tested with house air pressure, and reinstalled |
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Friday, February 06, 2015, 12:39, Isaac Earle, Repair, Target 1, Target, T1-MK1 Repair Status (Pos'n 1 Plug Leak)
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The T1-MK1 target is currently in the hot cell for repair of a leak at position 1. See E-Log #129 for details on previous work.
- Pos'n 1 right nut removed (a little stiff, but no excessive force required)
- Exterior threads cleaned w/ Scotchbrite disc on Dremel tool |
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Wednesday, February 18, 2015, 14:49, Isaac Earle, Repair, Target 1, Target, T1-MK1 Repair Complete
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This is a continuation of work detailed in E-Log #129 and #140.
- Static water test performed on the target cooling lines:
- Test setup assembled and leak checked by pressurising with house air, submerging in water and checking for bubbles (see photos) |
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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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Friday, May 01, 2015, 16:01, Isaac Earle, Repair, Target 1, Other, RH Warm Cell Used by Beamlines Group for TNF Heat Exchanger Leak Check
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The Meson Hall RH Lab Warm Cell was used by Beamlines Group for hydrostatic testing of the TNF heat exchanger. The location was chosen because
of access to a water supply, active drain, and the heat exchanger has removable contamination. The work took place on April 30th and May 1, 2015.
New plastic sheet was placed over the 6 foot block in the center of the warm cell which was used as a work area. The plastic was removed after |
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Monday, May 25, 2015, 12:48, Isaac Earle, Repair, Target 1, Controls, T1/T2 Controls System Crash
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At 9:15am this morning BL1A tripped off due to loss of the watchdog signals for the T1/T2 control system. Graham Waters investigated and the
problem was found to be a corrupted initialization file. The error was corrected, and BL1A was started by 11:30am.
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Wednesday, August 19, 2015, 12:10, Isaac Earle, Repair, Other, Other, Warm Cell Water Window Seal Replacement Status 6x
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The following tasks were completed over the past 2 weeks:
- Aquarium Technology Ltd. (UK) was contacted regarding best method for replacing window seal. A detailed procedure was provided (attached
below) |
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Thursday, August 27, 2015, 15:47, Isaac Earle, Repair, Other, Water Leak, Warm Cell Water Window Seal Replacement Update
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Since the previous E-Log the following tasks have been completed:
- Panel spacer rods installed at 4 locations in each tank (two top, two bottom at approximately 1/3 and 2/3 the way across)
- Spacer rods expanded only slightly to begin compressing the rubber window spacers while still leaving at least a 8mm gap between window and frame |
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Monday, September 28, 2015, 11:33, Isaac Earle, Repair, Other, Water Leak, Warm Cell Water Window Repair Complete
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The warm cell water window tanks were filled on September 17 after 2 weeks of curing time. A water leak was found coming from the seals of a plastic
pipe joining the two tanks near the top. This was repaired using rubber gaskets and quick cure caulking. The tank was refilled on September
18 and no longer leaked from that location. The sand filter was backflushed with the water exhausted to the grass area outside the hot cell lab until |
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Thursday, October 01, 2015, 11:43, Isaac Earle, Repair, Target 2, Target, T2-MK2 Target Ladder Drive Motor Failure
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The stepper motor that drives the target ladder on T2-MK2 has failed. This is the cause of the difficulty moving the target ladder yesterday
afternoon (see previous e-log). This was confirmed this morning by attempting to move the T1-MK1 target ladder in the storage pit using the portable
control box - the ladder moved with no issues. |
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Friday, October 09, 2015, 14:56, Isaac Earle, Repair, Target 2, Other, T2 Protect Monitor Replacement 9x
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On Monday Oct 5th a decision was made to uncover and remove the T2 Protect Monitor due to faulty readings. The monitor had been behaving
strangely since the September shutdown, and had been getting worse over time.
- Blocks were removed over T2 starting Monday afternoon. It is necessary to remove the narrow 12' block and two 6' blocks west of the T2 |
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