The T2-MK2 target was moved from the beamline to the hot cell on January 8th.  The field at 0.5m was 130mSv/hr.  Photographs of the beam spot of the Position 4 target are attached below.  This is a 12mm beryllium target (ID: "JUL.06#4).  This is the only target on the T2 ladder that has seen beam since it was installed on October 10, 2017.  A shielding plug was installed on the T2 flange.  A new 5cm target will be installed on the T2-MK2 ladder after fabrication is complete.  Regular testing and maintenance of the target assembly will also be performed before it is returned to the beamline.

The M20 beam blocker was also moved from the beamline to Hole #7 in the storage pit.  The field at 0.5m was 22mSv/hr.  A blank-off plate was installed on the M20BB flange (no o-ring).  Seal replacement and general inspection/testing will be performed before it is returned to the beamline.

 The RH Lab active sump level reached the high limit yesterday due to an overflow of the ultrasonic cleaner in the Rad Waste Area.  The sump was sampled by RPG, and after analysis the water was approved for release.  The water was pumped out today.  Local and MCR alarms functioned as expected.

 Five 5 gallon metal pails with active waste were moved from the Warm Cell to the Cyclotron East Vault Tunnel today for long term storage.  The pails were labeled with radioactive item tags and storage item numbers (1442 through 1446).  The pails contain used resin from T1, T2, and STF, as well as one pail with active metal parts.

The following is a summary of MRO work done on the T2-MK2 target during the 2018 shutdown:

Jan 8:
- Target moved from beamline to hot cell;  130mSv/hr at 0.5m

Jan 10:
- Position 4 (12mm Be) beam spots photographed.  Spot is slightly high and left (from beam's eye view), also smaller and rounder (less eliptical) than usual - See E-Log #232

Jan 11:
- Flushed position 0,1,2,3,4 with water, then 4,2,1,0 with air
- Left with 10psi air running overnight in Position 0

Jan 12:
- Moved to position 4, 10psi air running through over the weekend to dry cooling lines

Jan 15:
- Pumped out water lines with leak detector
- Frist pump down blanked off tubing and new vac hose (no LN2): ~15 mins to get to 0.0E-10 TorrL/s
- Pumped out target w/ cold trap:  ~7 mins to get to 0.0E-10 TorrL/s (left pumping for 2 hours)

April 2:
- Removed plugs at position 3 and 5
- Pressure tested, leak tested, and recorded alignment dimensions for first batch of new 5cm targets (#301, 307, and 309) - Records stored with targets in RH lab office
- Installed new 5cm beryllium target #309 at Position 3, and target #307 at Position 5 
- Helium leak check on target water system:  Baseline 0.0E-10 TorrL/s leak rate, 1.0E-3Torr, half second helium applications @ 4psi
      Positions 1, 2, 3: no response
      Positions 4, 5: up to 5.0E-10 after delay (appears to be drift)
      Lower 'C' seals: no response
      Upper-left 'C' seal: up to 1.2E-9
      Upper-right 'C' seal: up to 2.4E-9
      Left bellows: up to 6.0E-9
      Right bellows: up to 3.0E-9
- Deemed water leak tight and ready for use (based on previous leak check results and operating experience)
- Tested all target position micro switches: all OK
- Tested profile monitor limits: both OK
- Tested profile monitor actuation: off down limit @ 5psi, on up limit at 35psi
- Tested potentiometer: slightly noisy signal from position 0 to 2 (no change from before)
- Measured Position 3 and 5 elevations

April 3:
- Measured Position 3 and 5 horizontal alignment wrt ladder
- Quick repeat of leak check:  no change

April 6:
- Target returned to beamline
- Vacuum pulled on T2 area (1ACG4 down to 5mTorr in ~2.5hrs, was 4mTorr before venting yesterday)
- T2 cooling package started with target at Position 0 - no change to T2 vacuum
- Target information sheet and elevations data delivered to Ops
- XTPAGE 7L information updated
 

 The water in the South TNF Holding Tank was released today under work permit #C2018-08-28-3.  The tank contained approximately 100L from the T1 cooling package (drained Aug 16, 2018) and 350L from the 500MeV system (drained April 23, 2018 by Steve Sapriken).

The following items were moved today from the Warm Cell to the Rad Waste Pit for long term storage:

1. A 55 gallon drum containing various active components from the East Hot Cell.  The drum was labelled on the body and lid with the identification number RWC-55-01-2019.

2. The old M9 Q1Q2 service stand, which was removed from the beamline in the 2019 winter shutdown

Photos taken during the move are attached, as well as a copy of the loading record form for the drum.  The form has also been given to RPG.

A second drum (RWC-55-02-2019) remains in the Warm Cell, and will later be moved to the cyclotron vault tunnel for storage.  It was resurveyed after the first drum was removed and deemed too low-level for storage in the pit (300uSv/hr at 0.5m)

The M9 beam blocker was returned to the beamline today using the RH shielded transport flask.  The top flange o-ring was replaced before installation.

After installation the "Lift T" assembly was removed, and electrical cable and air supply connected.  Correct functionality of the limit switches was confirmed with the control room.  Actuation of the beam blocker could not be tested at this time because control takes place through the M9 area ASU.

 The following work on the T2-MK1 target was completed sporadically over the last few months:

Sept 22:
- T2-MK1 target moved from storage pit to hot cell (new camera view to check flask doors and latch engagement works great)
- Rubber pad from storage pit standoffs was stuck under flange - removed and cleaned base of flange
- Preliminary leak check: target positions and  delta seals no response, left bellows (facing ladder) had tiny response up to 3.0E-8 with recovery in ~5s, right bellows no response
- Removed plugs at Position #1 and #3

Oct 14:
- Installed 12mm Be target #106 at Position 1 (confirmed with Yuri that it may be useful to have a short Be target on the T2 ladder)
- Installed 5cm target #301 at Position 3
- Leak checked target positions: no response, only mild delayed drift
- Position 4 plugs removed

Nov 10:
- Installed 5cm target #302 at Position 4
- Repeated leak check: no response at all target positions
- Took vertical and horizontal measurements for all new targets
- Position limit switches and potentiometer confirmed working ok

Nov 24:
- Moved to Storage Pit Hole #4
 

 March 29 Monday

- moved T1-MK1 target from beamline to hotcell  (field from target 15mSv/hr @ 0.5m)

- flushed water through position 4

- flushed air through all positions

- left air running @ 5psi overnight through position 5

- potentiometer reading "O/L" at position 3, all other positions OK

- all micro switches OK

- removed the left plug (when facing ladder) at position 1 , but after reading elogs it was found that the right plug at position 1 was having issues. Will have to replug left with new plug

March 30 Tuesday

- pumped down with cold trap, started at 10:00

- test port 2.0 E-1 Torr after 1 hour

- cold trap removed, cleared, dried, refilled

- 11:10, started pumping, found leak at lab vac tubing joint. Fixed.

- 11:16, started pump again

- 11:24, 1.0 E-3 Torr TPP, 1.4 E-9 L/s leak rate

- preformed leak check, no response at all locations

- position 4 Be target removed (required hammering). Damaged spot, potential start of hole observed at center of beam spot (see attached photos)

- position 5 graphite target removed (required hammering)

- New 12 mm Be target #108 installed at position 4

- New 12 mm Be target #109 installed at position 5

- leaving position 3 plugged as the potentiometer is reading "O/L" as indicated from the multimeter 

- New plug installed on left side of position 1

- 15:47, stated leak check pump down

- 15:57, 2.0 E-3 Torr 

leak check results

All positions were no response (NR) except

Position 1, Right side plug) 5.9 E-8 Torr

Position 3, Left side fitting) 5.3 E-9 Torr

Position 4, Left side fitting) 4.2 E-9 Torr

All locations should be H2O tight

March 31 Wednesday

- took vertical and horizontal measurements of the new position of 4 and 5 targets (updated elevations PDF sheet included)

tested profile monitor activation

- started moving at 15 psi 

- reached limit at 35 psi

- both limit switches OK

- Cleaned base of vacuum flange and top of support ring

- prepared target ready for transport with flask (ladder in position 0)

- contacted MCR to update XTPAGE 7L target details

- emailed Tony Tateyama to have PLC lookup tables updated with new target info

 The RH Lab Active Sump reached the high level sensor at some point overnight before the April 8th work day.  Maico Dalla Valle noticed the alarm in the morning and notified RPG and myself.  I also received a notification by e-mail from Vicky Hannemayer who had been contacted by Ops because of the RCR alarm.

After sampling and testing by RPG the sump contents were released under work permit C2021-04-08-5 as per the procedure in Document-64834.  The approximate volume of the full sump is 7270L.

 The T1/T2 water packages were drained into the B1AAWHT (280L), the water was sampled and tested by RPG, results included in elog.

Once given the all clear myself and Maico released the water from the B1AAWHT (300L). 

It was discovered that the solenoid valve SV1 which is located in the RH lab beside the sump, is broken and will need replacing, picture included in elog.

Having the solenoid broken caused the draining to go slower then normal.

The T2-MK2 target was moved from the target station to the storage area (position 3). Upon removal, it was measured with a pole monitor at 0.5 m to be 960 mSv/h.

The T2-MK1 target was moved from the storage area (formerly position 4) to the target station. Services were reconnected in order to prepare for normal operation.

The beam blockers for M9 and M20 were actuated, and vacuum was monitored to ensure no disruptions. Both actuation tests were successful. Motion was observed and no abnormalities noted. Cabling and air connections checked: OK.

Note: there was a safety interlock issue with M9 which prevented actuation - a relay or fuse was temporarily removed from the safety system ~10 years ago but it was not replaced. It was replaced for the purpose of this test, and then removed again.

The profile monitor actuation tests were completed for T1 and T2. No abnormalities were noticed in vacuum during either test.

Note: an issue was observed with T2-MK1 - see e-log 290. The issue was resolved.

The T1-MK2 target was moved from the hot cell to the storage area, in position 5. Note: manual nudging of the flask was required to get it to align with guide pins properly.

Target T2-MK2 was moved from the storage location (formerly position 3) to the hot cell in preparation for replacement of end of life targets.

On Aug. 18, 2022, Operations informed RH group that an alarm activated for the full status of the MHESA B1 RCR1 Lab holding tank. Additionally another alarm was reported in the RH control room regarding the RH sump full (Southwest Meson Hall Extension - Remote Handling area). However, there is an alarm signal for the RH sump that was seen as OK at the MHESA Lab HMI.

Upon examining the RH active sump it was clear that the water level was in fact quite high, and the red warning light on the local control box was on.

After sampling and testing by RPG the sump contents were released under work permit C2022-08-19-3 as per the procedure in Document-64834. The approximate volume of the full sump is 7270L.

When the water level was below the warning threshold (i.e. red warning light came off, and green light indicating "sump good" came on), a request was made to the control room to reset the alarm. Operations cleared the alarm at the RCR Lab controls and retired the signal defeat that was in place in the DCR (“RCRL warn” signal was defeated).

Edit (2022-08-23): BL1A holding tank water level was checked - it is empty.

The water level inside the BL1A active water holding tank was checked today (Aug. 23, 2022). The tank is essentially empty at this time.

The target elevations measurement and beam spot checks were completed on Sept. 15, 2022. This was done after a July 2022 target exchange for target positions 3 and 5.

Updated target elevation drawing can be found in DocuShare (Collection-33652)