 Tuesday, March 27, 2012, 13:14, Isaac Earle, Repair, Target 1, Target, Water removal from T1 monolith 
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All water was removed from the base of the target hole in the T1 monolith using a suction tube device and wypalls. Video inspection was performed
and revealed standing water in the unused 4" beam line pipe facing south as well as on the bellows on the M13 beam line. (Photos attached)
Vacuum group is currently pumping down on the T1 volume to remove the remainder of the water. |
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Friday, March 23, 2012, 14:50, Isaac Earle, Repair, Target 1, Target, T1 Target Leak - Update
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The T1-MK2 target was transferred from the beam line to the hot cell. Water was seen in the bottom of the target pipe confirming that the leak
is from the target. The lower cone of the target assembly was submerged in the water and came up dripping wet. The profile monitor, protect
monitor, and two of the target cassettes were also wet. As it is not possible for those to be submerged, water was likely spraying from either the |
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Thursday, March 22, 2012, 13:58, Isaac Earle, Repair, Target 1, Cooling, T1 Package Water Leak - Update
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Vacuum group pumped down on the T1 & T2 volumes (because there is no cold trap on the T1 pump) for approximately 1 hour this morning. A
significant amount of water was found in the base of the cold trap which confirms our suspicions of a water leak on the T1 target.
Tomorrow we will transfer the T1 target from the beam line to the hot cell for inspection, leak checking, and repair. |
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Wednesday, March 21, 2012, 17:28, Isaac Earle, Repair, Target 1, Cooling, T1 Package Water Leak - Update
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The water level in the T1 cooling package expansion tank was checked again today approximately 24 hours after it was refilled. The level
had dropped about 5cm, equating to roughly 3.5L of water lost.
The T1 package was inspected thoroughly and no water was found. A leak on the target in the beamline is suspected. The T1 package has |
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Tuesday, March 20, 2012, 10:31, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling Package - Potential Water Leak
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The T1 expansion tank warning level sensor had tripped and the level was approximately 1cm from the base of the tank. No trip warning was observed
when Tom Lyth checked the panels last week. The T1 cooling package and target monolith were inspected and no water was observed. Two puddles
of water were found in the BL1A tunnel around the T1 package area: one directly below the 1AQ9 Cable Interlock Tray, and another approximately 1.5m to |
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Tuesday, March 06, 2012, 15:27, Isaac Earle, Repair, Target 1, Target, Quick Connect Fittings on T1 Target
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The air hoses for the profile monitor supply line were inspected and no cracking was found (was found on T2). The quick connect fittings
for the bottom air assembly were sticky/corroded and not actuating properly. Replaced fittings with new parts. |
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Tuesday, February 21, 2012, 09:56, Isaac Earle, Repair, Target 2, Target, Air Supply Check Valve & Q4 Flow Transducer
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The faulty air pressure supply check valve for M9BB, M20BB, and T2 Profile Monitor was replaced.
The rotor, shaft, and o-ring were replaced on the Q4 flow transducer to address erroneous readout that began last week.
The attached plot shows the flow readout before failure, during the failed state, and after repair. |
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Thursday, February 09, 2012, 17:19, Isaac Earle, Repair, Target 1, Cooling, T1 & T2 General MRO
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The following work was performed on the T1 cooling package:
- New filter housing installed for Col. A filter. The new housing has a drain valve to prevent water spills during future filter changes.
- Ball valve installed upstream of Col. A filter to allow proper isolation of filter during filter changes. |
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Thursday, February 02, 2012, 16:54, Isaac Earle, Repair, Target 2, Cooling, T2 Device Air Line Issue
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While checking operation of the M9 and M20 beam blockers earlier this week, a strange noise was noticed coming from the T2 cooling package area. It
is a squealing sound that starts when M9BB, M20BB, or T2 profile monitor are actuated and continues for approximately 30 seconds, then stops. The
source was eventually narrowed down to somewhere on the air supply line coming from the air amplifiers on the south mezanine. When the air amplifiers |
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Monday, January 30, 2012, 16:44, Isaac Earle, Maintenance, Target 1, Cooling, Completed T1 Cooling Package MRO
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Replaced all o-rings and filters on the T1 cooling package. Replaced resin can. Refilled package
and restarted.
Can inlet resistivity at 9.8M |
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Wednesday, January 25, 2012, 13:26, Isaac Earle, Maintenance, Target 2, Target, M9BB Returned to Beam Line
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M9 beam blocker returned to beam line.
T2 target disconnected, picked up using flask, and returned to beam line as training exercise.
Field @ 50cm from T2 target during removal: ~90,000μSv/hr |
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Monday, January 23, 2012, 15:27, Isaac Earle, Repair, Target 2, Target, M20BB returned to beam line. M9BB moved to hot cell.
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M20 beam blocker was transferred from the hot cell to the beam line.
M9 beam blocker was transferred from the beam line to the hot cell.
Field at 50cm from M9 beam blocker during removal: 5000μSv/hr |
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Friday, January 20, 2012, 10:23, Isaac Earle, Repair, Target 2, Target, M20 BB Shaft Bearing Replaced
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The replacement shaft bearing was machined by Maico Dalla Valle and installed in the beam blocker. Smooth operation of the beam blocker air cylinders
was confirmed, and the beam blocker is scheduled to be re-installed in the T2 monolith on Monday morning (Jan 23). |
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Wednesday, January 18, 2012, 12:01, Isaac Earle, Repair, Target 2, Target, Broken M20BB Bearing Removed, New Design Complete
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The broken M20 beam blocker plastic shaft bearing was removed. Measurements of the bearing as well as the shielding disc (for which drawings
can't be found) were taken inside the hot cell and a brass replacement bearing has been designed based on these measurements.
Photos of the removed bearing, measured dimensions of bearing and shielding disc, and a PDF drawing of the new design are attached. |
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Friday, January 13, 2012, 17:04, Isaac Earle, Repair, Target 2, Target, Broken Part found on M20 Beam Blocker
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While wrapping up vacuum seal bearing replacement on the M20 beam blocker I found a piece of hard black material approximately 3x1x1cm on top of
the hot cell turntable. Checked for contamination and found 480,000cpm on the Ludlum 44-2 probe, and off scale on the pancake monitor. This
piece fell from the transport flask when it was opened above the hot cell after picking up the M20 beam blocker. Upon further inspection, more pieces |
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Thursday, January 12, 2012, 11:34, Isaac Earle, Maintenance, Target 2, Target, Replaced M20 Beam Blocker Vacuum Seal O-Rings
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Replaced M20 beam blocker vacuum seal o-rings. Old o-rings were noticeably harder, but not brittle or cracked. Applied "Haskel
Dry Air Seal" lubricant to air cylinder shafts and "Apiezon M Grease" to vacuum seal o-rings and main shaft. Took approximately 1
full days work. Total dose: 0.08mSv. |
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Friday, January 06, 2012, 15:37, Isaac Earle, Maintenance, Target 2, Target, Transferred M20 beam blocker to hot cell
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Uncovered T2 monolith and transferred M20BB to hot cell using flask.
Field at 0.5m from beam blocker while being lifted with flask: 21,700 |
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Thursday, January 05, 2012, 10:21, Isaac Earle, Maintenance, Target 1, Cooling, Defeated T1 and T2 cooling package vacuum interlocks.
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Defeated T1 and T2 cooling package vacuum interlocks at 1-C panel on South mezzanine in Meson Hall to allow cooling packages to continue running
after beamlines are vented.
Notified operations. |
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Thursday, January 05, 2012, 10:18, Isaac Earle, Maintenance, Target 2, Cooling, Swapped Resin in T2 Cooling Package
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Drained T2 cooling package water, collected sample and delivered to RPG. Swapped resin can, refilled, and restarted cooling package.
After 6 hours can inlet at 10.3MΩ *cm,
can outlet at 10.5MΩ*cm electrical resistivity. |
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Thursday, December 22, 2011, 15:27, Isaac Earle, Maintenance, Target 1, Target, T1-MK1 Transferred to Storage Pit
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T1-MK1 target transferred from hot cell to storage pit position #3 to free up the hot cell in preparation for shut-down activities.
Current device locations in storage pit:
Pos 1: TNF Resin Can |
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