 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 |
Friday, July 17, 2015, 10:14, Isaac Earle, Development, Target 1, Target, T1/T2 Be Target Failure History & Replacement Plan 
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T1 and T2 beryllium target failure history was investigated back to 2000 (as far as XSTRIP records were readily available). For each target cassette
the following were noted: length of time the target was subject to direct beam, length of time the target was on the ladder w/o direct beam, and method
of failure. The purpose of the study was to devise a target replacement strategy so that T1 and T2 beryllium targets are preemptively retired from |
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Thursday, August 13, 2015, 09:47, Isaac Earle, Development, Other, Other, "Clamp A" disassembled and used to build clamp "TRH1257-#01"
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The 4" Marman flange clamp (IRH0001) labeled "Clamp A", as used in the testing detailed in Document-114623 Release 1, has been disassembled.
The parts were used to build a TRH1257 clamp which uses the new TRH1259 jaw with 0.480" jaw root width. This new clamp has been labeled
"TRH1257-#01", and will be tested with Helicoflex H-303654 seals in the near future. |
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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, 10:29, Isaac Earle, Standard Operation, Other, Active Sump, RH Hot Cell Lab Active Sump High Level Sensor Tested
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The RH hot cell lab active sump high level sensor was tested as part of the yearly scheduled inspection. High water level was simulated by
tilting the sensor sideways with a long pole sample scoop. The Main Control Room and Hua Yang from Nuclear Medicine were notified before the test.
The alarm sounded as expected, and a message was received in the main control room. This is a latching signal, so a Control Room operator will |
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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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Wednesday, September 30, 2015, 17:07, Isaac Earle, Standard Operation, Target 2, Target, Target Moves for Profile Check - Possible Motor or Control Box Failure
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The T1 and T2 targets were moved to position zero, then back to the target position today so that beam profile could be checked using the profile monitors.
Movement for both targets was done with the portable control box.
The T1 target was moved from Position 4 to Position 0, then back to Position 4 (after checking the profile) with no issues. |
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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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Monday, October 05, 2015, 15:25, Isaac Earle, Standard Operation, Other, Other, Old T2 Protect Monitor Cassette Update
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The T2 protect monitor cassette removed in April 2015 (see E-log #154) was surveyed today. It was approximately 3mSv/hr at 0.5m and 15mSv/hr
on contact. It is unlikely that this monitor will ever be cool enough for hands-on elevation adjustment that it requires, therefore it has been bagged,
labeled, and transferred to the east hot cell for storage. |
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Tuesday, October 06, 2015, 14:04, Isaac Earle, Other, Other, Controls, Instructions for loading display screen for T1/T2
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The following instructions were provided by Graham Waters:
From diag5pc bootup |
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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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Friday, October 09, 2015, 15:18, Isaac Earle, Repair, Target 2, Target, T2-MK2 Check at Hot Cell and Motor Drive Cable Replacement 7x
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While the T2 monolith was uncovered for T2 Protect repair (see previous e-log), it was decided that the T2 target should be moved to the hot cell to
address issues discovered last week with target ladder movement (see e-log #175)
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Friday, October 09, 2015, 15:52, Isaac Earle, Repair, Target 1, Target, T1-MK2 Protect Monitor Replacement and Inspection 12x
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When the damage to the T2 Protect Monitor was found to be caused by flying debris from a vacuum spike (see e-log #179), it was decided that the T1 Protect
Monitor should also be replaced.
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Tuesday, October 13, 2015, 10:52, Isaac Earle, Standard Operation, Target 1, Target, T1 & T2 Target Ladder Moves
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The T1 and T2 targets were both moved from Position 0 to Position 4 at approximately 2:30am on Saturday October 10th using the portable control
box. Operations had tried to move the T1 target to position 4 using the old control system but for unknown reasons it would move to any position
except position 4 and the portable control box had to be used. The portable control box should continue to be used for T1 and T2 target moves until |
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Thursday, November 05, 2015, 17:07, Isaac Earle, Repair, Target 2, Target, T2-MK1 Profile Monitor Repair and Pos'n 3 Target Removal 8x
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The following work was performed on the T2-MK1 target. The profile monitor and monitor cage on this target were damaged in January 2013, See E-Log
#68
Oct 23: |
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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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Wednesday, February 24, 2016, 13:03, Isaac Earle, Repair, Other, Other, Target Flask 2-Ton Hoist Chain Twist Corrected
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A 1/2 turn twist in the target flask hoist chain has been corrected to address a deficiency observed by inspectors by Gordon Crane. This
was accomplished by first holding the flask door yoke at the top position using rope slings, then lowering the hook block spider approximately 6",
then lifting the stationary end of the hoist chain approximately 2" using the Meson Hall main crane to make the top of the chain slack. |
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