Completed uncovering shielding and RH setup over 1A Q14 triplet area, see photo for RH setup.

- D. Preddy disconnected coil #1 thermocouple on Q14 in an attempt to clear ground fault, fault still present.

- Moved three asymmetric steering magnet cables to see if ground fault cleared, no effect.

- D. Preddy will contact D. Louie for power supply issues, will contact RH when job complete.

Radiation survey map here: Jan 18 1A Triplet Area

1.5 day work delay due to plant group unavailable on the 21st of January. Gardner air compressor was being moved.

Today:

- Moved bridge off 1AQ14, cleaned and relocated.

- Uncovered 1AQ15, set up bridge over magnets, downstream of 1AQ15. Completed at 14:15.

Radiation survey map here: BL1A Q14 Q15 Uncovered

- Two magnets exposed, fields are higher (1200 uSv/h vs 600 uSv/h). Cover plate still on 1AQ15, see photo.

- Waiting for D. Preddy to complete work.

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 ground (pwr supply chassis).

- Q14 read 250 ohm and Q15 read 3 ohm.

- Disconnected power leads on Q14 and Q16 steering magnets. No change to ground faults.

Systematically moved wires off of magnets to find ground fault

- Moved north side asymmetric steering wire on live bus bars, no change

- Moved beam spill monitor (#57) cable, saw fluctuation in resistance on Q15.

- Moved disconnected thermocouple wire (from last year) on Q15, resistance change was observed.

- Moved thermocouple cable on coil #11, resistance change observed. No change on coil # 5.

- Resistance varied from 3 ohm to infinity.

Replaced RH bridge over Q15 shield block to facilitate re-installation of disconnected thermocouple.

- Removed RH bridge over Q15.

- Re-installed Q15 shield block.

- Re-installed 8' bridge over Q14 space.

- J. McKinnon reconnected thermocouple connectors & bound with Ø1/16" aluminum wire before covering. See photo.

Q14 re-covered with shielding.

- Cover plate on Q14 replaced.

- No water was found on beam line floor.

1AQ14 shielding restored and two lead panels replaced to cover T2 monument. See photo.

Tomorrow:

- Uncover Q15 # 16 to find ground fault.

Continued with work on finding ground fault on 1A triplet;

Uncovered Q15 & 16 to 1AS1 area. See photo below for setup.

Disconnected last years thermocouple cable (coil circuit #9) at connector, no effect on ground fault.

- Removed connector cable rad levels: 10 uSv @ 0.5m 100 uSv on contact. No removable contamination.

- Cable stored in hot block storage.

- Will re-connect in future date and left in 1A service chase.

Q15 ground fault appears to be in the cables running into the triplet service chase. Moving beam spill monitor cable (BMS #57) appeared to have most effect on resistance in ground fault.

- Chase and cables shown in photo.

- Wiggled beam monitor cable, resistance varied from 4800 ohm to infinity.

T. Moskven disconnected BMS #57 at control rack.

- No change to ground fault resistance, at 4800 ohm.

- T Moskven reconnected BSM control cables after days work was completed.

Compared Q16 power supply to ground for reference.

- Disconnected asymmetric steering power leads (1ASM 11A & B) to Q16 and disconnected Q16 power supply.

- Resistance measured at 0.470 M ohm from coil power lead to ground.

- Reconnected magnet power supplies after.

Discovered that the aymmetric steering leads (pyrotenax cable) on north side of triplet magnets feeding Q14 and Q16 are disconnected at Q16 power supply.

- D. Preddy recommends leads are unbolted at magnets. Leads appear above the four bus bars in photo.

Q14 resistance was at 250 ohm, Q15 resistance varied between 4800 ohm and infinity.

Today: Uncovered 1A triplet cable chase and reconfigured shielding. D. Preddy will continue with diagnosing ground fault on Monday.

Photo of uncovered cable chase shown below. Note that steel blocks with rust (in middle far left of photo) are contaminated.

Rad survey map from last Friday (25 January) here.

Found exposed thermal switch cable in triplet service chase.

- Fibre glass outer sheath was damaged leaving 5" of exposed cable. See photo below.

- Cable found under corner of shielding block.

- Fixed with black electrical tape, each wire individually taped, 9 wires in total. See photo.

Found Q15 thermocouples were touching water lines near yellow connector was exposed and contacting waterlines.

- Insulated with nomex paper to isolate wire/connector. See photo.

Reconnected thermocouple from 2012 and jammed thermocouple head between water lines. See photo.

Wires were moved again to see if the resistance had changed after applying fixes. Resistance to ground stayed at 4.8 kOhm.

Triplet booster pump turned back on by R. Kuramoto and D. Preddy. No problems.

Q15 power supply was reconnected and tested to 800 A. Regulator voltage at 9 A, load voltage at 60 V.

- Ground fault interlock re-enabled by C. Yee in Q15 power supply.

- Ground current measured at 20 mV (through power supply ground shunt).

D. Preddy feels power supply is okay to operate. Power supply currently off and locked out, booster pump left on. Will prepare to restore service chase shielding and uncover triplet magnets to remove asymmetric steering wires.

Restored shielding over 1A triplet chase.

Uncovered Q16 and set up RH bridge with lead blankets over Q16. 

Cut Q14 and 16 asymmetric steering leads off north side pyrotenax connector block.

C. Ballard unbolted Q16 asymmetric steering lead from Q16 working through RH bridge floor opening.

- Rad levels through RH bridge were 2 mSv/h.

- Vacuumed tops of 1A triplet blocks and T2 area.

- Total time for jobs: 1.5 min, accumulated dose 0.04 mSv.

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 glass insulation, see photo.

- J. Mckinnon severed cables and removed unused sections. Accumulated dose for job: 0.27 mSv.

- Respirator cartridge dropped into beam line trench, see photo (on top right corner of Q14 magnet photo).

- Rad fields were the same as before. See previous survey maps for levels. Q14 rad levels, Q15 rad levels, Q16 rad levels.

Photos of Q15 before and after cable removed, note bus bars at top of photo.

D. Preddy performed power test, ground fault persists at same resistance (magnets now at 250 Ohm Q14, 3.5 kOhm Q15). Doug deems it okay to run triplet in this state.

No water was found on magnets during final inspection. All three magnets were uncovered and visually checked for water before replacing dust covers.

- Booster pump was running.

- Q15 & 16 shield blocks back in place.

- Q14 left uncovered at this time, remote handling bridge still present in area. Shielding still needs to be fully restored.

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.

Additional photos are on the remote handling group drive.

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.

- Job done through RH bridge through floor tile and 6' tongs.

- Cable end pictured in center of photo toward left of magnet.

- Replaced cover plate, checked for water leaks, none found.

2. Restored Q14 shield block.

- J. McKinnon performed power test on triplet (Q14, 15, 16). Tested okay.

3. Restored triplet shielding. See photos.

- 1st layer restored.

- 2nd layer restored.

- Photo of temporary bunker for triplet shielding. Bunker was located East of T2.

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.

Tomorrow: B. Gasbarri and J. McKinnon want to take measurements of the T2 monolith to verify its position and compare with past data, no crane activities are to occur while this is being done.

Beam lines took measurements of top of T2 using Leica Total Station. Required no crane activities over 1A blocks.

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).

1. Covered T2 cooling package and top of monolith with plastic sheeting.

- In addition covered 1A triplet shielding as well.

- Installed 1AS1 18' shield block after sheeting was laid down.

2. Discovered 1A Q14 indium ring thermocouple (TW# B1-378) & thermocouple coil circuit #1 (TW# B1-379) had cable insulation damage. Damage was down to bare wire.

- Wires located under east side of cooling package. See photo.

- Wires repaired with black electrical tape.

3. Vacuum started on T2 volume @ 10:47, roughing pump only.

- @ 11:15 vacuum pressure leveled off at 1.5 T (1ACG4 reading). 11:15.

- @ 13:30 the roughing pump blower package was turned on.

- @14:45 vacuum level steady at 250 mT (1ACG4 reading) .

4. Uncovered and partially set up over T2 M9, Q1 Q2.

- This setup is similar to 2011 and 2012 setups.

- 1A Q12 and 13 were uncovered during setup and a visual check for water leaks was done. None were found.

- Setup uses two 12' x 6' x 4' blocks with 18' x 6' x 4' resting on top, spanning the joint; See photo.

- Will continue with set up next day.

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.

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.

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.

Bagging bunker was setup west of the T2 M9 work area, see photos.

Began disconnecting M9 Q1 Q2 services: Electrical and thermal switch connectors disconnected from service stand, water service lines for Q1 and Q2 remain to be disconnected.

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

Water connections at service stand partially disconnected.

- Q2 water lines disconnected, 1 Q1 water line is disconnected but stuck on hansen fitting. with continue on Monday.

- Photo showing stuck fitting shown below (fitting on the right).

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.

Completed disconnecting water services from services stand to Q2.

- Supply connector (the connector that did not come off last week) came off with some effort, return connector came off with no effort.

- Appears to be a slow leak from the male hansen fitting supply side; leaking @ one drop every 11 sec. Also observed a very slow leak (> 2 min) on Q1 return side on magnet stand.

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.

Inspected M9 Q1 joint bottom bellows bolt lug and spring eye gaps.

- Bottom bolt is in tension, tried to move with tool and did not move.

- Observed spring eye gaps: 1/32" or less on West spring eye, 0.200" on East spring eye.

Cleaned up RH setup in preparation for moving bridge setup tomorrow.

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.

M9 Q1 joint disassembled, blank off and pins removed.

- M9 Q2 joint pin drive retracted but was not removed. Pin drive did not contain the roll pin that aids extraction of the drive.