On 8March2016, under W/P C2016-03-08-2, 4VQ3 was lifted out of BL4V with the vault orbit crane where it was first weighed then lifted onto the RH flat deck rail dolly.  It was then moved into the RH basement where it was surveyed before lifting it up onto the Red wagon cart in the RH loading bay.  It was then pulled to the Meson Hall loading bay by fork lift where and then over the Cycloton vault to the top of the E-Hall roof beams under the 10 Ton crane.  4VQ3 weighed 5900 Lbs. using Plants Groups "RON Load scale".  It was 60uSv/Hr @ 0.5 M on the upstream side with no contamination on the swipes.

The total accumulated dose received was 0.34mSv spread amongst 7 people.

See the attached photos.

 On 14March2016, 4VQ1&Q2 were removed from BL4V and lowered into the Vault basement B3 level where they were stored in the south west corner on their respective wood pallets.  The hot ends of both magnets were place against the west wall.  4VQ2 was lifted out first and moved temporarily downstream where it was separated from its magnet stand. Q2 was then craned into the basement where it was tipped 45^o to lay on the flat side of the magnet face.  Q2’s magnet  stand and it’s mounting brackets were then craned down onto another pallet and moved to the same storage area.

4VQ1 was pulled about 3-4 ft. downstream using a pair of ¾ Ton come-along winches to clear the overhead Elevating Jacks platform.   Q1 was then separated from its stand where both were lowered onto pallets like Q2 and moved to the storage area.  Four concrete shield blocks were postioned down stream of 4VCM1 to shield the beam exit port.

The total accumulated dose received was 0.46mSv spread amongst 5 people.  See W/P C2016-03-11-5 for Rad survey levels of Q1 & Q2.

See the attached photos.

Warm cell reconfigured for water leak repair at coil termination. Radiation surveys done. M20 Q1 ready for removal of insulators.

Attached photo of warm cell as of Tuesday morning.

Insulators # 6,7,8 removed from Q1 headers late afternoon by C Ballard. Ready for removal and re-brazing of #7 joint some time today.

Old #7 coil fitting removed, replaced and re-brazed today by M Good. Insulators ready to go back on to magnet coils to be pressure checked.

Image P1020013.JPG shows #7 coil fitting before removal. Heat shielding in the form of small aluminum sheets were installed to protect the magnet and electrical wiring.

Image P1020028.JPG shows new #7 fitting with all tools removed from area.

Reinstalled ceramic insulators #6 7 8 to Q1 magnet by C Ballard. #6 and 8 went on with no issues. The copper tubing on insulator #7 had to be bent to match the new position of the re-brazed #7 fitting. This may have been due to the removal of the inner and outer conductors (the two copper plates that clamp the two coils together) during yesterdays repair which shifted the position of the coil. See photos.

4" indium flanges at the 2C rad hard valve were cleaned of the remaining indium by C. Ballard. Both upstream and down stream flanges were done, ready for installation of new valve.

Today:

Bridge setup complete; Noticed 12 x 3 x 3 block when placed on top of several other blocks rocked when placed down.

Took initial photos of joint: west side approximately 0.05" to 0.06" gap, east side 0.20" to 0.220" gap. Joint appears to be the same as before. See photos.

Will do visual/video inspection and leak check tomorrow morning.

Joint repair continues.

Leak Check:

- Local leak check performed around area of T2, M9-Q1. All seals other than T2 Q1 were leak tight. Largest source of leak was the T2 Q1 joint area.

- Leak check done in quadrants around joint, response times were <2 sec of applying helium. Leak detector also responded when He probe was near joint (before actually applying He).

Video and Physical inspection:

- Bottom weld lug bolt found in tension/captive (ie. not free to move). Confirmed static by poking bolt. (Videos of this in RH group folder).

- Top weld lug had > 0.2" of gap.

- East and West pins seen leaning slightly toward North (toward Q1).

Loading Test:

At 13:30 a load test was performed to observe the effects of loading nearby blocks around T2 (see photo). Two 12 x 6 x 3 shield blocks were stacked one on top of the other and vacuum was observed, one then the other. There was no observable effect on the vacuum each time. Bottom weld lug bolt was still frozen when poked.

Blocks were replaced to their original locations once test was complete.

The T2 volume was vented at ~14:15 in preparation for disassembly to be performed on Monday.

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 RH group folder)

- One blank off prepared with indium ready for installation.

Will continue tomorrow with Q1 scrape and re inspection.

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.

- Before installing, an attempt was made to set the bellows in a position to correct for some of the misalignment. This was done by closing the joint with no ring and pinning the east flange ear and leaving it for ~1 hour.

- Blank off installation began at 12:30

- A universal joint installation tool was used to install the East pin. This was due to the very small gap available to install the pin on the East side. The east side of the flange was also pried upon in order to close the east side of the joint. As a result the pin leans North once installed. West pin was installed with no issues.

- Installation finished at 14:30 (roughly two hours, not including flange prep work)

- An inspection after installation revealed the lower lug to be in tension an hour after installation of the pins and blank off.

- Spring eye gaps on installation appeared to be 0.05" to 0.06" on the west side and ~0.2" on the east side.

Will be doing inspection and leak check later today.

Today:

Completed leak check of M9 T2 area: joint(s) are He leak tight. Remote He lines checked as well, see attached.

- Indium blank off ring was cut free from the string tethers.

- Removed extra tooling and equipment, West side pin threaded cap installed. East side needs new capping device since the lean of the pin is beyond installation parameters.

- Vacuum pressure still running higher than normal but stable (see previous e log).

- Water leak in the M9 Q2 magnet return header was discovered. Very slow leak (> 10 minutes per drop). See attached photo and videos on RH group drive.

Cleanup continues tomorrow.

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.

- Took photos of spring eye gaps and some video inspection, looks roughly the same as yesterday (see photos).

- Installed a dust cover over the east spring pin (see photos).

Looking at placement of indium rings loaded with EPDM and Buna N at joint for radiation exposure. Will install the test rig on Monday & clean up site for covering up.

Today;

Restoring shielding at M9 T2 area and cleaning up RH setup.

- RH workbench, pole tray and bridges removed from work site.

- 18' x 6' by 3' bridging block removed (at 14:25) to reveal the T2 monument. No apparent change in vacuum, will monitor as shielding is restored.

- Magnet power tests completed by beamlines group, no issues reported.

- Rubber testing ring installed between M9 Q1 and T2, see photo.

- Spring eye gaps appear to be the same as on Friday (after 48h), see photos and video.

Work continues re covering the M9 T2 site tomorrow.

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.

- A Small gap in shielding near T1 filled in by plant group in addition to the shielding restoration (neutron radiation).

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 for valve.

- undid the two captive RH bolts holding top half of valve body. valve body was then removed and bagged. note that gate assembly is free of valve body, body is light enough to lift out by hand.

- valve swiped, 300 to 700 CPM found on removed portion of valve. level inside valve at beam line was 6 mSv. fields at bridge not higher than 400 uSv, see survey map.

work will be continued by vacuum group.

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.

- started T1 roughing pump at 15:25, will pump over night.

- RH setup and tools still on beam line, valve area not yet covered.

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.

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.