Today: Restored filler shielding in T2 M9 Q1Q2 hole.

- Blocks marked with beam direction on this installation. Active faces point toward target monument.

- Checked spring eye spacing after installation under vacuum overnight, appears to be equal on both sides. 1/16" spacing.

- Remote handling equipment has been removed from work area and restoration of shelding around T2 has begun as of 15:00.

Today:

Disconnected and removed 4VVR1 gate valve and removed from beamline.

- Pin drives removed and stored in bags near by

- Hook collar removed and stored in separate bags. The hook collar used at CM1 was marked with an "X".

- Indium rings also removed and stored in separate bags. Indium appeared to not stick on to the flange during removal on the tank side flange. A closer inspection will be needed at a more convenient date.

- Craning out the valve proved difficult as the shiv block was interfering with the motor lift. Lifting the valve on to the combination magnet, adjusting the sling length shorter and then final craning was the procedure used.

Cyclotron tank flange entrance at combination magnet has been covered with plastic bag and taped off. Valve was then transported to the north tunnel alcove for intermediate storage as per instructions from RPG.

Note that during cart transport, the valve tipped and fell off the cart. No visible damage could be seen on initial inspection.

Returned work permit C2016-01-27-2 due to tank lid being raised and elevated fields make the work area un-favourable to work in. Work will resume to blank off the combination magnet flange when the tank lid is closed in March.

Tasks remaining:

- Inspect combination magnet flange, document valve stand

- Clean indium off of flange (if necessary)

- Install indium blank off and helium leak check

Disconnected all 4V beamline joints. Parts for indium joints removed except for the Q1 to downstream monitor box and monitor upstream to Q2 due to access issues (no space for ingress). Removed pin drive and collars currently piled on top of the beam line stands near the concrete shielding block on the north side of the vault. These need to be sorted for storage as waste or spares. Indium ring carriers were all bagged and left in the area waiting for a storage location.

Continued with work blanking off CM1 flange.

- Placed lead shot on left and right side of the CM1 flange to lower fields. No significant change, went from 2.8 mSv to 1.9-2 mSv.

- Inspected indium flange, some residue on 3 and 9 (left and right) clock sides of knife flange. No significant indium stuck on, some small cleanup done.

- Spare blank off test fitted, did not fit: rocking felt from side to side. CM1 flange seems to be ovalized. Test fitted an aluminum carrier ring (B-3471), fit. Difference in OD sizes is 5.560 vs 5.550 (indium carrier ring is smaller). Will skim blanking plate to 5.550" and reassemble blank off.

Work to continue next week.

Rolled indium into new blanking plate turned down to 5.550". Dry fit with no indium ok. Assembled hook eyes from the previous blank off plate (removed from the slits box?). Used the same 20.5 mm spring compression (1.5 turns of the nut from finger tight). Hooks did not move 100% completely freely, but seemed ok.

Blanked off CM1: Reused CM1 pin drive (was written on the pin drive) Pin drive was 500 uSv/h on contact. Working at beam plane level seemed to have lower dose rate. Drove down to 1/8" just before shoulder on taper. Intended to use WD-40 but can was empty. Vacuum leak check will have to wait until a later date.

2016 02 23: Attached scanned inspection report of as installed blanking plate.

Attempted to remove RH parts between Q1, 2 and monitor vacuum box. Removed Q1 to monitor box parts, could not remove monitor to Q2 parts, pin drive and indium ring are stuck in place. Indium joint is severed however. Collar was removed.

East leg of pin drive was bent trying to remove the stuck indium ring, it is stuck to the monitor box.

Recommend to proceed with removal of magnet regarless of the current state of the indium ring.

Pails with RH parts marked 1384, 1385, 1386 and stored in north end of vault tunnel on grey shelf. RPG storage book updated to reflect this.

Re-installed indium vacuum joint for 1VQ4, routing installation. R. Kuramoto sprayed silicone grease on to the threads and bushings on pin drive. Drove down tapererd pins and stopped 1/16" short of old marker markings.  RK. Commented on the drive screw bending under load, reversed drive 1/2 turn to relieve the stress on the screw.

Contacted E. Dalla Valle to continue assembling beam line down stream and pump when ready.

Week of Jan 23 to 27:

- Uncovered shielding around T2 M9 area.

- Initially set up remote handling bridge thing but stopped because of the stacked 12 x 2 x 3 blocks, looks precariously tall, wobbly. Suggested to postpone leak checking work and configure bridge to a more usual setup for safety.

 - Moved some bridges around, put some lights in cable tray area.

- Beamlines tied in M9 floor markings to the meson hall grid on the 18th

- Beamlines tied in B1 alignment to meson hall grid on 26th

- He leak checked around T2 area with Dimo and Edi, nothing found. Suspicious leak at M20 scraper area but cannot rule out drift toward the collimator joint. Will need to reassess later on in the shutdown when we go to that area.

- Doug and electricians looked around the cable tray feeding to M9, via tunnel and mezzanine.

Finished setting up work area around T2 M9 front end.

Removed temporary shielding blocks from M9 hole and placed in temporary bunker. Capped with 18' shielding block. Blank off ready to be removed and target jigs ready to be installed, weather permitting.

Raw leak check results from vacuum group attached as pdf.

 - Removed blank off from t2 m9 port, had to pry off with screw driver via spring ears. Clean removal it seems.

- Blank off is 200 uSv @ .5 m, 5000 CPM above bg.

- looks like 2 knife steps all around with oozing on the left and right, 0 and 180 deg positions. 0 and 180 look like 2.5 steps. Looks like it took one turn to remove/loosen blank off.

- Junk indium at bottom of exit port still present, indium knife edge seems clean. Ribbon stayed in blank off.

Prepared m9 and b1 flanges for accepting their target jigs. The target jigs need to be reset by alignment group, 15" was bumped and 8" lost 2 of the target balls into the beam line. Reflector balls were recovered with a magnet on a stick, contaminated with 250 CPM, need alignment group to decontaminate and clean them before use and reset the two jigs.

Syd installed two springs on the 8" target jig and only one spring is needed.

Installed all jigs and Alignment group did their shoots successfully. Used individual pins on the 15" target jig and worked ok. 8" target jig has some previously undiscovered issues from the previous shoot from 2015 but did not affect this shoot.

Attached a quick comparison of M9 exit port flanges WRT indium remnants: looks roughly the same. Will attempt to install blanking plate tomorrow morning.

Installed the blank off on the T2 M9 exit port:

Blank off 2013 installation procedure: 2.5 turns of the preload nut, after pins are engaged and springs are at free length.

Blank off 2015 installation procedure: 1.5 turns of the preload nut, after pins are engaged and springs are at free length. (one less turn for insurance?)

2017 (this year) installed blanking plate via hammering/tapping pins into place:

1. Spring eyes were set at spring free length and then placed down
2. Pins did not slide through eyes as was expected.
3. Nuts were then backed off roughly 1 turn, then pins were lightly tapped down into place
4. Nuts then turned back to zero/starting position
5. Then alternating east west by .5 turn tightened to 1.5 turns, 1/2 turn indicated by half bar pen marking.

This year different than prior years due to tapping pins into place rather than backing off eyelet nuts and sliding pins into place *then* tightening to zero point and then tightening to preload.

Blank off installed at 11:15, vacuum group not able to pump on T2 until tomorrow.

Leak checked the blank off at T2 M9 exit port with Dimo Y. and Edi D.V. (Vac Group) and they confirm it is leak tight. Blank off installed on the 15th, pumping started on morning of the 16th and leak checked today in the morning on the 17th.

Starting to clean up work area.

Restored shielding to T2 M9 void, blocks seem more crooked compared to previous years.

Started uncovering the area above the T2 to Q13 joint:

On Monday found leaking joint was the ring directly downstream of T2. Vacuum group has been spraying Vacseal (http://www.vacseal.net/Pages/default.aspx) sealant over the last 3 days attempting to get it in between the flanges and have partial vacuum to draw in the fluid. Seven sprays have been completed as of March 16th.

Tomorrow, 2 more applications will be made and then Vacuum group will pump the T2 volume over the weekend.