 Tuesday, January 29, 2013, 16:28, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Restored shielding over 1A triplet chase.
Uncovered Q16 and set up RH bridge with lead blankets over Q16. |
Monday, January 28, 2013, 16:28, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault) 6x
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Rad survey map from last Friday (25 January) here.
Found exposed thermal switch cable in triplet service chase. |
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Friday, January 25, 2013, 15:15, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Today: Uncovered 1A triplet cable chase and reconfigured shielding. D. Preddy will continue with diagnosing ground fault on Monday.
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Thursday, January 24, 2013, 17:05, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Continued with work on finding ground fault on 1A triplet;
Uncovered Q15 & 16 to 1AS1 area. See photo below for setup. |
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Wednesday, January 23, 2013, 15:51, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Continued work on finding ground fault in 1A triplet magnets;
D. Preddy connected ohmeters to 1AQ14 & 15 power supplies with power leads disconnected. Ohmmeters were connected from magnet power leads to |
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Tuesday, January 22, 2013, 16:02, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair
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1.5 day work delay due to plant group unavailable on the 21st of January. Gardner air compressor was being moved.
Today: |
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Friday, January 18, 2013, 14:40, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair
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Completed uncovering shielding and RH setup over 1A Q14 triplet area, see photo for RH setup.
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Wednesday, January 16, 2013, 17:03, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair
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Moved 18' blocks away from triplet area in preparation for uncovering triplet. Plastic laid down up stream of t2 target station for short term storage
of 6' layered blocks. |
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Tuesday, January 15, 2013, 16:37, Keith C Ng, Primary Beamlines, Maintenance, 1AVA8 valve o ring replacement
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Job completed today and shielding block over valve restored.
- He leak checked valve and accessible up stream joints, no leaks found.
- J McKinnon checked power supplies for nearby steering magnets before and after covering valve. supplies working ok. |
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Monday, January 14, 2013, 16:36, Keith C Ng, Primary Beamlines, Maintenance, 1AVA8 valve o ring replacement
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continued with o ring replacement, replaced all relevant o ring seals on valve (valve body seal and actuator arm dynamic seals).
- valve re installed and services reconnected.
- valve cycled and checked; valve, limit switches ok. |
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Friday, January 11, 2013, 15:44, Keith C Ng, Primary Beamlines, Maintenance, 1AVA8 valve o ring replacement
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Assisted vacuum group with removing 1AVA8:
- uncovered valve area and set up remote handling bridge over valve.
- shut off pneumatic supply to valve to render valve in mid position (shut off valve in 1A tunnel). disconnected electrical services and air supply |
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Wednesday, October 24, 2012, 11:53, Keith C Ng, M9, Repair, M9 T2 blank off complete
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Shielding around m9 t2 restored as of 11:45, vacuum levels still the same since 19 October.
- Work permit returned.
- A dose record of the job is attached as a spread sheet. Total dose for all workers is 1.89 mSv for the job. |
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Monday, October 22, 2012, 15:48, Keith C Ng, M9, Repair, M9 T2 clean up and shield restoration
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Today;
Restoring shielding at M9 T2 area and cleaning up RH setup.
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Friday, October 19, 2012, 18:21, Grant Minor, M9, Development, 8" double-ring test samples of EPDM and BUNA-N (Nitrile)
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Today I picked up two 2FT x 4Ft x 0.125" thick strips of stock EPDM and BUNA-N (Nitrile) material from BC Rubber Supply. A copy of the Packing
Slip is attached. Here is the information from the Sample Sheet:
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Friday, October 19, 2012, 16:48, Keith C Ng, M9, Repair, M9 T2 Joint Repair cont.
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Today:
Cleaned up work site and removed extraneous poles and tooling. Radioactive parts stored in lead flask now located on TNF.
- Two pins, an RH bullet bolt and indium ring (tb22148) were put into lead flask for storage, flask now located on TNF. |
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Thursday, October 18, 2012, 16:28, Keith C Ng, M9, Repair, M9 T2 joint repair cont.
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Today:
Completed leak check of M9 T2 area: joint(s) are He leak tight. Remote He lines checked as well, see attached.
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Thursday, October 18, 2012, 08:26, Keith C Ng, M9, Repair, M9 T2 joint repair cont.
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Yesterday:
Installed indium blank off at M9 T2 joint and pumped down at 15:20 to 15:45 overnight. 1ACG7 (T2 vacuum pressure) reads between 6.0E-3mT and 2.0E-2
mT as of 8:15 today. |
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Tuesday, October 16, 2012, 19:50, Grant Minor, M9, Repair, M9T2 Joint Repair - Status Update 16 Oct 2012
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| See attached. |
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Tuesday, October 16, 2012, 19:47, Grant Minor, M9, Repair, Inspection of failed double-indium thru-ring TB22148
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See inspection notes attached for failed M9T2 double-indium thru-ring TB22148, inspected on Oct 15th 2012.
Ring was approximately 3 mSv/hr on contact and 100 uSv/hr at 0.5 m.
Total dose accumulated during inspection on dosimeter 122 was 0.1 mSv |
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Monday, October 15, 2012, 17:03, Keith C Ng, M9, Repair, M9 T2 joint repair cont.
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Today:
- Removed pins and removed indium through ring. Joint fully open at 14.5 to 15 turns of retraction mechanism.
- Did initial video inspection of T2 and Q1 flanges, some residual indium on knife surfaces, did initial scraping of T2 flange. (see videos on |
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