C. Fisher, A. Schmidt, A. Tam

UC#48 Handover satisfactory

• Target taken out of glovebox and tested for fit
• The left most triplet conductor leg was seen to be slightly misaligned, but the test fit showed that the bolt still threads on with some flexing from the suspect target leg.

Target inserted into NHC successfully

•  tight fit with IGLIS means some rubbing of the two conductor legs did occur with the tool port tunnel
• NHC target tray used, so tray from transportation was left in anteroom 
• HVAC vacuum pressure dropped below threshold for a minute while toolport door was open.
  • Operations chained off SHC doors and RPG got involved to ensure the safety of everyone in the area

Target Install successful

• A moment of rough handling of the target occurred when tilting the target towards operator in preparation for install
• The suspected misaligned conductor leg did not initially accept a screw, but the use of a T-handled allen key and using a different screw from the package worked
• Leak checks successful
• Electrical checks successful

Replacements of NHC tool cart has been built, but some modifications may be made before it is inserted into the hotcell

Findings

• During April 2025 safety walk ID: 2796 , it was noted that the oil level in NHC window oil expansion tank was below the indicator range.
• previous safety walks from July, October, Jan 2024 did not show any issues, but this was not a recorded item, only to check for leaks 
• No visible leaks from the exterior can be seen. 
• No air gap can be seen inside the window, so it is completely filled
• Last fill date September 28, 2022, no notes of finding a leak prior to, or after the fill
  •  ID: 2369 Entry time: Wednesday, September 28, 2022, 13:15

NHC Window Oil Filling

• Oil used was from a separate pail labeled Hot Cell Window Oil, believed to have come from the 55gal mother pail containing Penreco Drakeol 10 B LT Mineral Oil NF
• Nitrogen supply needle valve was closed to prevent oil from blocking this line
• Oil was filled from the removed pressure relief valve position which deviates from the procedure previously used ( ID: 2369 )
  
  • This was done to avoid oil from entering nitrogen supply line and limit oil from entering pressure gauge 
  • Valve from previous fill location (alleged old accumulator location) was also open to encourage better breathing
• ~1,775mL added via squeeze bottle before oil was seen in the indicator tube. Another ~1100mL was added via squeeze bottle to bring oil fill indicator to the previous 2022 fill mark that is about halfway up the tube. 2,875mL Total
  • This is considerably more oil added than in 2022 (1.5L)
  • Location of oil level and fill date marked on indicator tube and on reservoir  with blue Sharpie 
• Accumulator valve closed, Pressure relieve valve re-installed, nitrogen supply line valve opened 
  • 1.8 inH2O reached in ~10 minutes. 2.2inH2O was indicated the next morning 

Notes

• Oil level check on quarterly safety walks will be added
• Increased checking interval during the first quarter will be performed 
• Unrelated NHC entries in 2024 did not note any oil leaks, so not sure where 2.5L+ of oil has gone in 2.5 years
• SHC window oil level has remained about halfway up the indicator tube. 

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May 12, 2025 - Aaron Tam 

Oil fill check 

• Two observations were made on the oil level. Once on May 6th with ~0.5cm below mark and may 12th ~1cm below mark
  • Photos uploaded 
• Nitrogen pressure is higher than last recorded at 3.1 inH2O
• I have a suspicion that a large gas bubble exists above the window in a separate holding tank. More observations to come 

May 7th, 2025 - Aaron Schmidt, Aaron Tam 

UC#49 Handover - good

• April 30th - Initial fit check was performed
  
  • This is a new procedure that allows time for any potential modifications to be made. 
• May 7th ~9:00am Target taken out of glovebox and tested for fit
• Target legs and mounting bolts all thread in nicely. Bottom 2 conductor leg mounting holes have slightest misalignment.
• Target bagged, and brought to ISAC Hot-cells anteroom

Target inserted into NHC - successful

•  Target loaded onto cart without issue

Target Install - Complicated 

• Gas line gasket dislodged upon fully inserting target onto source-tray guide-pins
• During the attempt to remove target from source-tray, East manipulator tong cable hopped off a pully
  • This is the same slave manip that was recently replaced ID: 2799 
• Attempts to reinstall the gasket proved unsuccessful, and gasket was ultimately lost under the source-tray
• 3 more gaskets were inserted into the Hot cells, with the same unsuccessful outcome
  • gaskets lost underneath source-tray
• One attempt to install a side loading gasket was tried
  
  • stopped after the first try as the tool is liable to fling the gasket to a critical area 
• Aaron Schmidt made a new tool to install a male-side gasket
  • This proved to be successful (photo shown)
• The rest of the install procedure was successful 
  
  • without the East manipulator functional, west manipulator was used
  • west manipulator has a smaller tong opening to avoid cable hopping 
  • Finishing at 3:00pm UC target exposed to air for ~6 hours

Link to previous target information: https://elog.triumf.ca/TIS/RH-ISAC/1039

Monday, March 25, 2019, 10:00: Target electrical checks (See Attachment 1)

Tested for TM2 

Tom Kauss finished TH crane annual inspection yesterday. The crane woks fine. Tom has this inspection record in his file. The crane inspection tag has been issued for 2024.