 Wednesday, April 17, 2013, 16:45, Isaac Earle, Standard Operation, Target 1, Target, T1-MK1 Target Leak Checked
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| The T1-MK1 target was leak checked on April 15th at the T1 monolith by Ron Kuramoto and Edi Dalla Valle. No leaks were found. |
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Friday, April 19, 2013, 09:55, Isaac Earle, Development, Target 1, Cooling, T1&T2 cooling package safety/standards compliance upgrade complete (SASP0120)
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Yesterday (April 18th) the T1 and T2 cooling package PRV outlet lines were routed to the active drain in the 1A tunnel. All items for the safety
and standards compliance upgrade for T1 and T2 as specified in Document-68861 are
now complete. |
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Tuesday, May 14, 2013, 13:26, Isaac Earle, Development, Target 1, Target, T1 & T2 Profile Scan
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The T1 and T2 profile monitors were used during today's development shift. Target ladder movement for T1 was done at the panel on the mezzanine,
for T2 the portable control box was used. Both monitors actuated properly and the scans did not show any "missing" wires. The profiles
at both targets were found to be too broad and were adjusted to span 2 wires horizontally and 6-7 wires vertically (Yi-Nong Rao). |
Friday, May 31, 2013, 16:07, Isaac Earle, Repair, Target 1, Target, Power Supply Fan Failure 
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Today (May 31, 2013) I was contacted regarding a burning smell and high temperatures around the T1/T2 controls racks. Erwin Klassen, Bill
Rawnsley, Graham Waters and myself investigated and found that the cooling fans for two power supplies on the T1/T2 control racks had failed and both units
were warm to the touch. The power supplies are labeled "T1 Power Supply" and "T2 Power Supply" in racks 1-F and 1-A respectively. |
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Tuesday, June 04, 2013, 13:42, Isaac Earle, Repair, Target 1, Target, T1 and T2 Power Supply Fans Replaced
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Replacement of the power supply fans for the T1 Power Supply, T2 Power Supply, as well as an additional power supply in rack 1A was completed this
morning. The boxes were blown out with air to remove dirt and dust. The inside of all boxes were inspected and no evidence of melting or burning
was found. |
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Friday, August 23, 2013, 10:39, Isaac Earle, Repair, Target 1, Cooling, T1 Cooling Package Inlet Pressure (P1) Sensor
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The T1 cooling package inlet pressure (P1) has been dropping since approximately May 5, 2013 from the regular operating pressure of approximately
75psi to the present value of 47psi. An increase in the rate of decrease started around August 5th as well as increased noise in the signal. Plots
attached below. No corresponding change in the outlet pressure, and no change in the water flow rate (also no change in inlet and oulet temperatures) |
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Monday, September 09, 2013, 16:13, Isaac Earle, Repair, Target 2, Cooling, Drop in T2 Cooling Package Water Level
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On September 9th in the morning Ron Kuramoto noticed that the T2 cooling package expansion tank level was reading NOT OK for the warning level.
Looking at XSTRIP showed that the warning level tripped at approximately 1:50am on September 8th. The tank was refilled at 4pm on September
9th to the usual level (1/2" above the nut on the trip level float). The expansion tank level will be checked tomorrow and periodically throughout |
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Monday, September 09, 2013, 16:22, Isaac Earle, Repair, Target 1, Cooling, T1 P1 Transducer Replaced
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The BL1A tunnel was accessed today to assess a faulty reading from the T1 cooling package inlet pressure transducer (T1P1). The line was
first bled to remove gas bubbles which did not change the reading. The transducer was replaced with a new unit (OMEGA PX315-100GI). The pressure
reading returned to the usual value of approximately 74psi (faulty reading had been steadily decreasing over the last few months and was at approximately |
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Wednesday, September 11, 2013, 16:13, Isaac Earle, Repair, Target 2, Cooling, T2 Cooling Package Water Leak Repair
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The T2 cooling package was uncovered this morning and a leak was found coming from the Swagelok ball valve on the 3/4" target water outlet
line. The water was coming from the stem of the valve, indicating that water was leaking through the valve packing, rather than at the fittings for
the valve. The leak rate was approximately 1 drop every 5 seconds and a small puddle was visible on the top of the water reservoir. The water |
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Wednesday, September 25, 2013, 14:05, Isaac Earle, Standard Operation, Target 1, Active Sump, RH Lab Active Sump Level Sensor Inspected
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A notification was received that the RH lab active sump level sensor is due for annual inspection. The sensor was tested and is working properly.
The water level was observed to be only a few inches below the sensor level. Ken Buckley was notified and someone from his group will sample
and drain the tank according to the procedure in Document-64834 |
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Wednesday, October 23, 2013, 15:30, Isaac Earle, Development, Target 1, Cooling, T1 & T2 High Temp Safety Switch Tested
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An end-to-end test was performed on the new T1 and T2 high temperature safety switches yesterday during the maintenance day. The switch set
points were lowered below the current temperature and it was confirmed that all warning messages and XTPAGE status changes occurred as expected. |
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Tuesday, November 12, 2013, 11:49, Isaac Earle, Repair, Target 1, Target, MH Hot Cell Lab Manipulator Overhaul
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Complete overhaul of all manipulators in the Remote Handling Hot Cell Lab in the Meson Hall was performed by Peter Dudley from Central Research
Laboratories between October 28 - November 8th. Overhaul included replacing all tapes and cables, disassembling, cleaning, lubricating, and rebuilding
the master and slave wrist assemblies, adjusting motion locks, and other repairs/maintenance as required. All 6 manipulator arms in the lab are now |
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Saturday, November 23, 2013, 18:37, Isaac Earle, Repair, Target 2, Target, T2-MK1 Installation
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- T2-MK1 target transported from the storage area by Isaac and Grant and installed at the T2 monolith. All services were connected. Storage
pit covered.
- Edi began pumping approximately 10am, and was not able to pump below ~20 Torr. Dimo came in to assist. |
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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. |
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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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Wednesday, January 15, 2014, 15:38, Isaac Earle, Standard Operation, Target 2, Water Leak, Suck Tube Drained and Rinsed
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The suck tube vessel was drained, rinsed, and transported to the active sink area in the Meson Hall Hot Cell Lab. There are no longer high fields
from the suck tube and it is ready for future use. The filter, tubing, and flange used for filtering the active water were removed and bagged and
are currently stored in the south-east corner of the warm cell. This bag measured up to 12mSv/hr on contact. There are small black particles |
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Friday, January 17, 2014, 10:10, Isaac Earle, Standard Operation, Target 1, Cooling, T1/T2 Cooling Packages & Air Amplifier Shut Off
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In preparation for Edi to vent the BL1A vacuum volume, the T1 and T2 cooling packages were both shut off. They will remain off until vacuum
is restored in BL1A in a few weeks time. This afternoon, water will be purged from the T1 and T2 targets using compressed air so that stagnant water
is not sitting in the targets for an extended period of time. |
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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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Monday, January 20, 2014, 11:51, Isaac Earle, Repair, Target 2, Water Leak, Water Leak from Meson Hall Mezzanine Near T2
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A water leak developed this morning from a city water supply line at a hose connection near the T2 expansion tank. Water was observed to
be dripping off the mezzanine onto the plastic sheet covering the T2 cooling package. The leak has been stopped and the leaky fitting is being repaired
by Carston Frasden. |
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