Myself and Isaac removed the boot from the left hot manipulator.

- opened the hatch in the TH to get access to the top of the boot

- released the latch on the boot and loosened the boot from above

- closed TH hatch

- with the right manipulator we were able to detach the rest of boot

This test proved that we can remove a boot from the manipulator without having to enter into the hotcell.

Due to the physical restraints that the boot causes for the operator, we have decided to not reattach the boot with its current design.

A new design will be investigated to allow the boot to be fixed without twisting, which is the source of the problems.

Removed ITW HS and COIL flow rate monitors installed at the beginning of this year. They were installed on these two circuits for testing.They are broken during last run in ITW due to radioactive field.

Travis and I removed 4 shielding blocks located on top of pre-seperator  in TH. This is a job for ITE harp 9 re-installation after it  is repaired . The blocks move are successful.

Pail 237 only has 200u sv/hr field at 0.5 meter. On contact measurement: 0.9 to 1.6 m sv/hr.and less than 80 count contamination outside the pail.   It is moved to mini storage. We will transfer this pail to cyclotron vault and store it there later.

TM4 has been moved from TCS to SW silo. The move is fine.

TM4 has been moved from SHC to TCS. No target on module. The move is successful.

Frank and I removed TM2 from SMP to SHC. The move is successful.

Remotely remove TM2 from ITW to SHC. The move is good.  Shielding plug is put back to ITW.

The stand was used for transferring UCX11 targte from TH to SHC. The stand wit target was craned down from TH into SHC last week and stayed there over weekend. Chad and I removed the stand out of SHC yesterday. It was heavily contaminated. RPG and I spent more than 3 hours to clean this stand. See the emails I pasted below for  detail information.

Thanks, David, for letting me know about this. Here are survey results after my afternoon in Target Hall:

I spent 1.5 hours on additional decon of the stand, crane hook, and area around where David was doing the decon, finding up to 10k cpm (44-2) on some parts at first. Danka came to help after a bit (THANK YOU, DANKA) and we left the items covered in plastic and surveyed the area. Contamination survey results are as follows, numbers are units of cpm on the 44-2/RM14:

Tacky mats inside TMH door: 6000/2000

Tacky mats in hall before TMH door: 200/0

Tacky mats at boot box: 8000/4000

My booties: 50/0

Air sample at the decon area: 50/60 (also 100 cpm on alpha probe)

Floor swipes post-decon of floor: 0/0

Early results from a 10 min assay of the tacky mats shows predominantly Kr-85, Be-7, Sr-85, Rb-83, and Sr-82. A longer assay is underway.

The following measurements were made using the checking cave at the boot box (units of cpm):

David's respirator cartridges: 160

David's respirator: 0

Davids tank suit and booties: 1200

My suit: 100

My respirator: 0

The rags used for the decon work were contained in a bag and left behind the silos by the DST. This bag measured 240 uSv/h OC and 2 uSv/h at 0.5m

Thanks,

Andrew

Hi all, The UCx#11 target transferring stand is moved back from SHC to TH. However, the stand was heavily contaminated. On the first Windex clean up towel, the counts directly shoot over the 500K counts which is the maximum scales on both RM14 and 44-2. After almost 2 hours, more than 20 times cleaning up with Windex spray and paper towel wipe , the counts dropped below 300 now. It is extremely difficult to clean up this stand.  I dont think we should move the target this way again unless we have a solution on the contamination clean up. The stand is still hanging  on the crane, and waiting for RPG checking.                        Thanks    David

TM2 with UCx#37 P2N target  was removed from ITE to NHC yesterday morning. The move is good.

Remotely remove TM4(Ta#63) from TCS to ITE. The move is smooth and successful.

Remotely remove TM4 (ta# 62) from SHC to TCS.  The moving is smooth.

Remotely remove tm4 from silo to shc. The moving is smooth.

On 2021-04-19, Frank and I remotely removed Tm3 from SHC to silo . The moving is successful.

Remotely removed Tm2 from silo to SHC. The moving is smooth.

TM4 was moved from the conditioning station to the East target station.

TM4 was moved from the South Hot Cell to the Conditioning Station.

Tong cable on remote arm 9**4 has be relocated onto its pulleys and tong opening adjusted at the tong cable drum by changing the position of the tong cable screws by two positions (tightened/closed) such that the air tool will fit in the tong and some of the slack in the tong system has been taking up.

An attempt was made to also adjust the elevation twist pulley block which would also aid in taking up slack in the tong system however, the elevation twist pulley block was already and the end of its adjustment. Elevation twist cables are measuring 10 in lbs, the nominal value that they should be at is 15.

Tong system has been cycled multiple times and the tong cable itself looks good. This arm should be good for service however, I recommend a new pulley block be ordered and the new one dimensional compared to the existing. If they are the same we may consider shortening the new pulley block to achieve a window for tensioning, after which I would recommend the pulley blocks be swapped...swapping should only take place after 9342 has had the tong cable replaced and we can be more confident in its operational state, or in the 2026 shutdown in allowed.

ESC was called out again to inspect the chiller as it was showing the same problem as before. This time when started one fan came on (this is not what happened last time) but the fan controlled by the VFD did not. It was eventually traced to a relay that has been replaced. The system was tested as best it could without a load and appears to be working. It will be difficult to tell until a heat load is in place if the fix has solved everything. 

High active water system is refilled. Air are drained out of  system before pump to be started. Following sequence are used to bring the whole system back to operation:

1. close ITE , open ITW. Switch on the pump. Only 2A beam line related 5 water circuits are in loop in ITW.  Switch off pump when system pressure is stable above 100 psi.

2. Close ITW, open ITE. Switch on the pump. Only 2A beam line related 5 water circuits are in loop in ITE. Switch off pump when system pressure is stable above 100psi.

3. Open ITW, Open ITE. Switch on pump. both ITW and ITE beam line related water circuits are in loop.  Switch  off pump when system pressure is stable above 100psi.

4. Close ITE open ITW.  Bring ITW  target module water circuits back to loop by connecting bypass fittings on to circuits. Only bring one circuit back to system at first. Switch on pump. Wait for system pressure stabilized. Then Close ITW. bring next circuit back  to system.  Open ITW .  wait for pressure stabilized.  repeat the process until all water circuit and connected with bypass fittings in ITW.

5. Check possible leak on valves, fittings, and flow sensors in ITW pit.

6. Go to electrical room, check all ITW water signal status.

7. Close ITW, Open ITE. Repeat same procedure as step 4 on ITE target module water circuits.

8. Check possible leak on valves, fittings and flow sensors in ITE pit.

9. Go to electrical room, check all ITE water signal status.

10. Open ITW.  At this stage, full ITE station and half of ITW station water circuits are in operation.  Check possible leak on pumps, valves, fittings, gauges on water station at TH west end.

11. Keep system in operation. Watch on - tank level , system pressure, and conductivity on resin circuit and whole system.