 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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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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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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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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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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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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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. |
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Wednesday, January 30, 2013, 16:46, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Cut and removed asymmetric steering cables from Q14 and 16, cables are no longer resting on magnet power bus bars.
Cut short sections left on magnet and connector block. North connector block left in place. Short cable section on magnet insulated with fiber |
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Friday, February 01, 2013, 14:15, Keith C Ng, Primary Beamlines, Maintenance, M9 Q1 Q2; storage pit assessment
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Uncovered radioactive waste storage pit to see contents. Assessing viability of moving contents inside to facilitate storage of M9 Q1 Q2 magnet. See
below for some photos.
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Monday, February 04, 2013, 16:04, Keith C Ng, Primary Beamlines, Repair, 1A triplet repair (ground fault)
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Restored 1A triplet shielding and removed RH shielding.
1. Moved severed asymmetric steering cable on Q14 so as not to touch the coils underneath and the cover plate above it. |
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Tuesday, February 05, 2013, 16:12, Keith C Ng, Primary Beamlines, Maintenance, 1A triplet repair (ground fault) (Completed)
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Today: D. Preddy completed another power test on 1A Q14, 15, 16 after all iron/steel shielding was restored. Magnet power and steering supplies were
checked and O.K.ed. R. Kuramoto deems triplet repair job completed.
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Wednesday, February 06, 2013, 16:33, Keith C Ng, Primary Beamlines, Maintenance, t2 monolith measurements
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Beam lines took measurements of top of T2 using Leica Total Station. Required no crane activities over 1A blocks.
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Thursday, February 07, 2013, 16:02, Keith C Ng, M9, Repair, M9 Q1 Q2 removal, site prepration
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Started work on removing M9 Q1 Q2 magnets; area clean up and preparation, removing shielding above Q1 and Q2 and remote handling setup over magnet (moving
blocks).
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Friday, February 08, 2013, 15:31, Keith C Ng, M9, Repair, M9 Q1 Q2 removal, site prepration
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Completed remote handling/shielding setup over T2 M9, see photos for setup.
- Rad levels at 16' above Q2 were 1.2 mSv/h. Shielding was built up to 20' level, same as the opposite side to minimize exposure.
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Wednesday, February 13, 2013, 15:49, Keith C Ng, M9, Maintenance, M9 Q1 Q2 removal, preparation
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Local and remote leak checks on M9 T2 area were done today to confirm leak; Leak was still present at T2 M9 joint. M9 Q1 and Q2 power supply leads were
disconnected (C. Yee). Next task is to find the ground fault on the Q1 magnet.
Indium one piece blank off plate (TB22267) for blanking off assembly (TB22265) was submitted into shop today. |
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Thursday, February 14, 2013, 15:43, Keith C Ng, M9, Maintenance, M9 Q1 Q2 removal, preparation
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Removed 8" rubber test rings from M9 T2 joint. Rings moved to RH warm cell. Radiation levels were 70 µSv on contact 1.7 µSv @ 1/2 m.
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Friday, February 15, 2013, 14:29, Keith C Ng, M9, Maintenance, M9 Q1 Q2 removal, preparation
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Beam lines group purged M9 Q1 Q2 magnets and water lines in preparation of disconnecting water services to those magnets, done in morning.
- Note: Q15 protueus paddle wheel was replaced after finding it was worn
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Monday, February 18, 2013, 16:24, Keith C Ng, M9, Repair, M9 Q1 Q2 removal, electrical and water disconnected
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Today, re-arranged electrical wiring on Q1 Q2 magnet away from Q2 indium joint. Cable bundles were bundled as neatly as possible.
- One of the klixon thermal switch wires broke off while the cable bundles were being organized. See photo.
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Tuesday, February 19, 2013, 16:46, Keith C Ng, M9, Maintenance, M9 Q1 Q2 removal, preparation
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Determined M9 Q2 service stand supply connector was slowly leaking.
- Ball valve to the supply was leaking through allowing trace amounts of water through.
- System was bled again and pressure relieved, leak appears to have stopped. |
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Thursday, February 21, 2013, 17:02, Keith C Ng, M9, Maintenance, M9 Q1 Q2 removal, joint dissassembly
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CUALCW system water loss was not from 1A triplet. Q15 Q16 held static pressure at 90 psi since 9 am until 17:00. Holding with very minimal change in
pressure. Q14 reading 64 psi as of 17:00. D. Preddy informs all other systems leak tight.
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