 Friday, January 20, 2012, 10:23, Isaac Earle, Repair, Target 2, Target, M20 BB Shaft Bearing Replaced 
|
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). |
|
Monday, January 23, 2012, 15:27, Isaac Earle, Repair, Target 2, Target, M20BB returned to beam line. M9BB moved to hot cell.
|
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 |
|
Thursday, February 02, 2012, 16:54, Isaac Earle, Repair, Target 2, Cooling, T2 Device Air Line Issue
|
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 |
|
Thursday, February 09, 2012, 17:19, Isaac Earle, Repair, Target 1, Cooling, T1 & T2 General MRO
|
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. |
|
Tuesday, February 21, 2012, 09:56, Isaac Earle, Repair, Target 2, Target, Air Supply Check Valve & Q4 Flow Transducer
|
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. |
|
Tuesday, March 06, 2012, 15:27, Isaac Earle, Repair, Target 1, Target, Quick Connect Fittings on T1 Target
|
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. |
|
Tuesday, March 20, 2012, 10:31, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling Package - Potential Water Leak
|
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 |
|
Wednesday, March 21, 2012, 17:28, Isaac Earle, Repair, Target 1, Cooling, T1 Package Water Leak - Update
|
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 |
|
Thursday, March 22, 2012, 13:58, Isaac Earle, Repair, Target 1, Cooling, T1 Package Water Leak - Update
|
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. |
|
Friday, March 23, 2012, 14:50, Isaac Earle, Repair, Target 1, Target, T1 Target Leak - Update
|
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 |
|
Tuesday, March 27, 2012, 13:14, Isaac Earle, Repair, Target 1, Target, Water removal from T1 monolith
|
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. |
|
Monday, April 02, 2012, 15:18, Isaac Earle, Repair, Target 1, Target, T1-MK1 Installed in Beam Line
|
The T1-MK1 target was transferred from the storage pit to the beam line. Services were hooked up and the cooling package was started (operating
normally).
Target ladder documentation and elevation values for the new target were delivered to operations. |
|
Wednesday, April 04, 2012, 15:51, Isaac Earle, Repair, Target 2, Target, BL1A Update
|
Vacuum interlock defeat jumpers were removed for T1 and T2. The interlock was tested by venting the T1 and T2 volumes. Both packages registered
a vacuum trip, however only the T1 package shut off. A fault report has been filed to investigate this.
|
|
Thursday, April 05, 2012, 12:14, Isaac Earle, Repair, Target 1, Target, T1 & T2 Profile Monitors
|
Controls Group replaced the wiring and wire harness for the profile monitor limit switches on T2. The monitor was actuated remotely and functioned
properly.
The T1 profile monitor was also tested and actuated properly. The T1 monolith is now ready to be covered so that blocks may be removed from |
|
Wednesday, April 11, 2012, 17:02, Isaac Earle, Repair, Target 2, Target, T2 Vacuum Interlock & Expansion Tank Level Sensor
|
The problem with the T2 vacuum interlock was fixed by restarting the "Crate TG1" control panel microprocessor. The T1 and T2 vacuum
interlocks were retested several times and are functioning properly. Fault report #5907 was returned.
|
|
Monday, April 23, 2012, 09:55, Isaac Earle, Repair, Target 1, Target, Hot Cell Manipulator Broken Cable
|
While working on the leak repair of the T1-MK2 target in the hot cell on Friday April 20th, a cable snapped on the slave end of the right side
manipulator. It is suspected to be the 'Y' shaped cable assembly that actuates the grippers when the lever is pulled on the master end.
The target repair job cannot continue until the manipulator is repaired. The repair job may take up to a full week, and will require space |
|
Thursday, May 24, 2012, 18:26, Isaac Earle, Repair, Target 2, Cooling, Water Leak From T2 Cooling Package (Disconnected from Target)
|
Today I noticed a "NOT OK" signal from T2 water expansion tank warning level sensor. I checked the water level in the tank and
confirmed that the water level in the tank had indeed dropped. The water package is currently not connected to the target so it is not possible for
this water to enter the beam line. |
|
Monday, May 28, 2012, 17:17, Isaac Earle, Repair, Target 2, Cooling, T2 Water Loss Update
|
The T2 cooling package, the top of the T2 monolith, and the Hansen water connections which connect the package to the target were inspected and
no evidence of a water leak was found. Kim wipes had been stuffed inside the female Hansen fittings after they were disconnected on April 12th, and
these were also completely dry. I checked with control room and there are no log entries regarding anyone starting the cooling package during the |
|
Wednesday, May 30, 2012, 15:39, Isaac Earle, Repair, Target 1, Target, West Side Manipulator Removed from Hot Cell
|
The west side manipulator was removed from the hot cell using the new manipulator removal frame. The operation went smoothly and required
about one hour with two operators after everything had been prepared. No contamination was found on the manipulator thru-tube or slave arm. Only
50cpm were measured on the wrist assembly of the slave end. |
|
Wednesday, June 06, 2012, 08:48, Isaac Earle, Repair, Target 1, Target, Manipulator Repair Complete
|
Repair of the west side hot cell manipulator was completed and the manipulator was re-installed into the hot cell. No contamination was found
in the lab, on the manipulator support frame, or on any tools. A 'y' motion lock was also installed on the east manipulator and all accessible pulleys
and rollers were lubricated. |
|