 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. |
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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Friday, January 17, 2014, 15:41, Isaac Earle, Standard Operation, Target 1, Target, Water Purged from T1 & T2 Targets
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Water was purged from the T1 and T2 targets using compressed air. The water is stored in a labeled bucket on the BL1A blocks near the T2 cooling
package. The bucket is approximately 100µSv/hr on contact and 10µSv/hr at 0.5m. Isaac's coveralls had 500cpm on them after this job and were dropped off at active |
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Thursday, February 13, 2014, 14:27, Isaac Earle, Standard Operation, Target 2, Target, T2 Target Moves
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The T2-MK1 target was moved from the beam line to the target storage pit in position 4. The target was measured to be 30mSv/hr at 0.5m. The
move went smoothly.
The T2-MK2 target was then moved from the hot cell to the beam line. The target was 151mSv/hr at 0.5m. For reasons unknown the target |
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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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Thursday, April 03, 2014, 13:43, Isaac Earle, Standard Operation, Target 2, Target, T2 Profile Monitor OK
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T2 Profile Monitor actuation was tested today from the control room and all is working properly. The position (IN / OUT) also displays correctly.
To my knowledge nobody has looked at this system, so it is a mystery why it suddenly started working. This e-log will be updated if any explanation
is found. |
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Monday, April 14, 2014, 15:30, Isaac Earle, Standard Operation, Target 2, Target, T2 Target Moved to Position 4
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The T2-MK2 target (currently installed in the beamline) was moved from position 0 to position 4 (10cm Be) using the portable control box.
The T2 cooling package was started after moving the ladder.
There was no change in the BL1A vacuum. The T2 expansion tank water level dropped slightly, as expected (around 1/16"), and was refilled |
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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, May 14, 2014, 20:36, Grant Minor, Development, Target 2, Target, Target exercised to position 0, then back to 2.0 mm above position 4
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The T2 target was exercised to position 0 around 6:15pm so that the T2 profile monitor could be used by operations. The T2 water package was re-enabled
when the target was in position 0, however this resulted in some trips of the cooling package.
Operations called around 7:45 to request return of the target to about 2mm above position 4. |
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Tuesday, June 03, 2014, 22:56, Isaac Earle, Standard Operation, Target 2, Target, T2 Target Position Moves (Development Shift)
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The T2 target was moved from Position 4 to Position 0 at 11:15am so the profile monitor could be used during the development shift.
The T2 cooling package tripped regularly throughout the day on high flow while in position 0.
At 10:45pm the T2 target was returned to the previous running position: approximately 2mm above the nominal position 4 elevation (pot ratio fluctuating |
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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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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 14, 2015, 13:32, Isaac Earle, Standard Operation, Target 1, Target, T1-MK2 Moved from B/L to Storage Pit
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The T1-MK2 target was transferred from the beam line to the storage pit in hole #5 using the transfer flask. A maximum field of 7.2mSv/hr was measured
at 0.5 meters from the target. A video was taken while the target was lifted from the monolith and can be found on Isaac's PC (too large to upload).
The blocks to the west and east side of the T1 monolith (level with the monolith) were swiped by Danka Krsmanovic and no contamination was found. |
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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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Friday, February 20, 2015, 13:55, Isaac Earle, Standard Operation, Target 2, Target, T1 & T2 Target Moves
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- The T1-MK1 target was moved from the hot cell to storage pit hole #3 (ready as T1 spare)
- The T2-MK2 target was moved from the beam line to the hot cell for inspection and in preparation for T2/M9 work this shutdown
- The target measured up to 90mSv/hr at approximately 1m while being lifted |
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