 Friday, August 23, 2013, 10:39, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling Package Inlet Pressure (P1) Sensor 
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The T1 cooling package inlet pressure (P1) has been dropping since approximately May 5, 2013 from the regular operating pressure of approximately
75psi to the present value of 47psi. An increase in the rate of decrease started around August 5th as well as increased noise in the signal. Plots
attached below. No corresponding change in the outlet pressure, and no change in the water flow rate (also no change in inlet and oulet temperatures) |
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Monday, September 09, 2013, 16:13, Isaac Earle, Repair, Target 2, Cooling, Drop in T2 Cooling Package Water Level
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On September 9th in the morning Ron Kuramoto noticed that the T2 cooling package expansion tank level was reading NOT OK for the warning level.
Looking at XSTRIP showed that the warning level tripped at approximately 1:50am on September 8th. The tank was refilled at 4pm on September
9th to the usual level (1/2" above the nut on the trip level float). The expansion tank level will be checked tomorrow and periodically throughout |
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Monday, September 09, 2013, 16:22, Isaac Earle, Repair, Target 1, Cooling, T1 P1 Transducer Replaced
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The BL1A tunnel was accessed today to assess a faulty reading from the T1 cooling package inlet pressure transducer (T1P1). The line was
first bled to remove gas bubbles which did not change the reading. The transducer was replaced with a new unit (OMEGA PX315-100GI). The pressure
reading returned to the usual value of approximately 74psi (faulty reading had been steadily decreasing over the last few months and was at approximately |
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Wednesday, September 11, 2013, 16:13, Isaac Earle, Repair, Target 2, Cooling, T2 Cooling Package Water Leak Repair
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The T2 cooling package was uncovered this morning and a leak was found coming from the Swagelok ball valve on the 3/4" target water outlet
line. The water was coming from the stem of the valve, indicating that water was leaking through the valve packing, rather than at the fittings for
the valve. The leak rate was approximately 1 drop every 5 seconds and a small puddle was visible on the top of the water reservoir. The water |
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Tuesday, November 12, 2013, 11:49, Isaac Earle, Repair, Target 1, Target, MH Hot Cell Lab Manipulator Overhaul
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Complete overhaul of all manipulators in the Remote Handling Hot Cell Lab in the Meson Hall was performed by Peter Dudley from Central Research
Laboratories between October 28 - November 8th. Overhaul included replacing all tapes and cables, disassembling, cleaning, lubricating, and rebuilding
the master and slave wrist assemblies, adjusting motion locks, and other repairs/maintenance as required. All 6 manipulator arms in the lab are now |
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Friday, November 22, 2013, 20:26, Grant Minor, Repair, Target 2, Water Leak, T2 Water Leak - Target Assembly Removed and Water Sucked Out of B/L
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T2 target water leak was identified earlier this morning.
Isaac Earle, Ron Kuramoto and Keith Ng co-ordinated Meson Hall blocks removal and target flask transport.
Target assembly was removed from B/L approximately 5pm. |
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Saturday, November 23, 2013, 18:37, Isaac Earle, Repair, Target 2, Target, T2-MK1 Installation
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- T2-MK1 target transported from the storage area by Isaac and Grant and installed at the T2 monolith. All services were connected. Storage
pit covered.
- Edi began pumping approximately 10am, and was not able to pump below ~20 Torr. Dimo came in to assist. |
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Tuesday, November 26, 2013, 10:33, Isaac Earle, Repair, Target 2, Target, T2-MK2 Water Flush
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The T2-MK2 target in the hot cell was flushed with water and then purged with air so that stagnant water is not left sitting in the target. Replacement
of the failed 10cm Be cassette will take place in January 2014. |
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Monday, January 06, 2014, 15:55, Isaac Earle, Repair, Target 2, Target, T2-MK2 Repair
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The leaking 10cm Be target was removed from position 3 on the T2-MK2 target ladder and the water ports were blanked-off with 3/8" Swagelok
plugs. A 10cm Be target remains in position 4. The target was pumped down using the cold trap and a helium leak check was performed. All
target locations on the ladder were found to be leak tight. The delta seal locations and fittings above the vacuum flange were also leak tight, however |
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Thursday, January 09, 2014, 15:21, Isaac Earle, Repair, Target 2, Target, T2-MK2 Electrical Check
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An electrical check was performed on the T2-MK2 profile monitor by Bill Rawnsley. All signals produced the expected response, and Bill approved
the monitor for use. Bill has saved screenshots of the signal profile.
The target ladder position micro-switches and profile monitor in/out limit switches were also tested: all OK. |
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Monday, January 20, 2014, 11:51, Isaac Earle, Repair, Target 2, Water Leak, Water Leak from Meson Hall Mezzanine Near T2
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A water leak developed this morning from a city water supply line at a hose connection near the T2 expansion tank. Water was observed to
be dripping off the mezzanine onto the plastic sheet covering the T2 cooling package. The leak has been stopped and the leaky fitting is being repaired
by Carston Frasden. |
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Monday, March 03, 2014, 11:55, Isaac Earle, Repair, Target 2, Target, T2 Protect Monitor Moved to HC
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The T2 Protect Monitor was transported from the beam line to the hot cell this morning using the transport flask. The move went smoothly.
The only difficulty was locating the yellow flask alignment frame to the T2 monolith as the T2 protect holes on the yellow frame are tighter than
for other devices. It was necessary to remove four screws that secure the top flange of the T2 protect monitor assembly to the flange on the monolith. |
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Tuesday, March 11, 2014, 13:50, Isaac Earle, Repair, Target 2, Target, T2 Protect Monitor Returned to Beam Line
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After the monitor assembly was moved to the hot cell, electrical checks were performed by Bill Rawnsley which showed the same results as when tested
in the beam line. A new monitor was installed (supplied by Probes Group), the tests were repeated, with all results appearing normal. The monitor
assembly was transported to the beam line this morning and installed at the T2 monolith. All cables were attached and the flange was bolted down. |
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Tuesday, April 01, 2014, 10:17, Isaac Earle, Repair, Target 2, Target, T2 Profile Monitor Actuation - Fault Report
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The T2 profile monitor cannot be actuated from the control room. When the solenoid valve that supplies air to the air cylinders is powered directly,
the monitor moves in normally, therefore a controls issues is suspected.
Additionally the monitor position shows neither IN nor OUT. This does not change when the monitor is at either limit. Proper actuation |
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Friday, May 02, 2014, 15:49, Isaac Earle, Repair, Target 2, Target, T2 Protect Monitor Elevation Correction
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When beam was started in mid-April, it was observed by Operations Group that with the beam centered vertically within the protect monitor, the profile
monitor showed the beam spot to be approximately 6mm high. The protect monitor was changed during the shut-down due to a failure in November 2013,
so it was suspected that the new protect monitor was not aligned properly. The beam spot appeared to be dangerously close to the top weld of the |
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Monday, May 05, 2014, 15:46, Isaac Earle, Repair, Target 2, Target, T2 Protect Returned to B/L
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The T2 protect monitor was returned to the beam line using the shielded flask. The alignment pin did not align with the hole in the vacuum flange,
but could be aligned by hand by rotating the monitor assembly while it was hanging from the flange. The protect monitor vacuum flange was bolted
down and all services connected. The T2 protect and profile monitors were checked by Dave Cameron (both OK). Vacuum was pumped down and the |
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Wednesday, July 02, 2014, 16:56, Isaac Earle, Repair, Target 1, Cooling, T1-P2 and T2-P1 pressure transducers replaced.
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The T1-P2 (outlet) pressure transducer was replaced to address an erroneous signal. The XTPAGE value now reads as expected.
The T2-P1 (inlet) transducer was also replaced to address a noisy (and worsening) signal. Replacing the transducer seems to have had no effect
on the XTPAGE values. A possible controls issue is suspected and Jamie Cessford will be notified so that the matter is directed to the appropriate |
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Monday, August 11, 2014, 16:57, Isaac Earle, Repair, Target 2, Other, Air Amplifier Increased Cycle Rate
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On Friday August 8th Ron Kuramoto observed that the Meson Hall air amplifier cycle speed had increased. Cycle time measurements were taken on Monday
August 11th. The lower amplifier was found to be cycling 17 times per minute, and the upper air amplifier 16 times per minute (approximately 4s cycle
period). The cycle period for both amplifiers was measured in June 2012 and found to be approximately 25s. Note that a cycle is defined as |
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Wednesday, August 13, 2014, 16:34, Isaac Earle, Repair, Target 1, Other, Amplified Air Leak Narrowed Down to T1 Area
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During the maintenance day today, amplified air to the T1 area was valved off in an attempt to pin point the location of the air leak. The
air amplifier cycle rate returned to normal with the T1 line valved off, indicating the leak is somewhere on the T1 profile monitor air cylinders, the
T1 septum polarity switch, or on the supply lines to these devices. Because these devices will not be used in the near future, the line will be left |
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Thursday, September 11, 2014, 15:36, Ron Kuramoto, Repair, Target 2, Water Leak, 1A Tunnel T2 Cu-ALCW water leak
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On Sep. 3rd during the 6 hr maintenance day, Doug Preddy
& I went into the 1A tunnel under “controlled access” to investigate a water leak that triggered the Water Detection Sensors. It was also noticed that the Cu-ALCW tank level was losing water. |
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