 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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Tuesday, December 20, 2011, 09:54, Isaac Earle, Maintenance, Target 1, Target, Replaced T1-MK1 Target Ladder
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Replaced T1-MK1 target ladder with the new ladder design which has an integrated upper slide plate (2 less sealing locations) and no c-seal grooves.
C-seals replaced with aliuminum delta seals.Transfered all target cassettes to new ladder in the same positions. Performed helium leak check
at interface with bellows flanges and all cassette locations. No leaks detected. |
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Friday, November 04, 2011, 13:36, Isaac Earle, Maintenance, Target 2, Target, Kaon Target (Training)
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Moved Kaon Target from storage pit to remote handling hot cell using flask as training exercise. Safety surveyor scanned storage pit
area (wide flanges: clean, pit floor: 50cpm). Returned flask to hot cell lab floor and covered storage pit. |
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Thursday, June 30, 2011, 16:47, John Wong, Development, Target 1, Target, Testing Elog
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| blah blah blah.... fjda;jfeowifjoajglfa;nafg |
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Wednesday, June 29, 2011, 15:27, John Wong, , , , test
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| blah blah blah.... |
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