Post Irradiation Examination

October 9, 2024 - Aaron Tam 

Goal: Training (First PIE by Aaron), Characterize any anomalies 

Notes:

• Overall the target looks exceedingly clean with only some discolouration on the copper behind the target tube, and multipin cable insulation. 

 Resolution comment / Commentaire de résolution:

     Fixed issue by changing patch cord that was connected to the switch from patch panel.

Emile V

November 5, 2024 - Aaron Tam

TiC#9 HP-SIS removed from TM4

• Top left fixing bolt shows signs of heating on it (Comparison photos attached Bolt_profile.jfif  & Bolt_Tops.jfif)
• Location and orientation of darker bolt (Darker_bolt.jfif)

Parasitic Targets Removed

• Left target has residue left from ablation 

See photos attached for detail 

November 6, 2024 - Aaron Tam 

UCx#46 Target handover from TPO 

Target insertion: successful 

Parasitic Install: All Parasitic targets left off target

• Left side In-beam array type parasitic install attempt #1 
  • Parasitic assembly is too thin/studs too tall for the socket nut to fasten onto target. Stud protrudes through the length of socket section, not allowing tool to insert 
  • previously a 3/4 spacer was used to give space for thermal couple to enter 
  • Install of 3/4 spacer was difficult because it does not hold its shape when handled (pivots around 1/2 ad 1/4 portions) 
  • With spacer installed, parasitic assembly is too thick for socket nuts to fasten onto studs. 
    • It may have been possible to back out studs to use, but left off in the interest of time UCx is exposed. 

• Right side In-beam window type parasitic install
  • Similarly to Left side, studs were too short for install, studs could be backed out, but was left off in the interest of time UCx exposed

• PEEK seal parasitic targets were left off as per schedule, and will be leak checked at another date (after tong cable has been repaired) 
  • Order of PEEK seal locations preserved and follows order as seen with target installed (Photo attached)

Target install: successful 

Leak Check: Successful 

Electrical Check: Successful 

• Initially failed due to wiring diagram being different between production wiring diagram and electrical test sheet

Containment box panel closed 

 Nov. 8, 2024 - Aaron Tam 

Tong cable snapped when attempting to remove multipin connector bracket 

Assistance from Chad required for the rest of procedure 

Tic#9 was loaded into Pail#299 

• Along with fixing and conductor bolts (no other material was loaded)

 November 14, 2024 - Aaron Tam w/ Chad Fisher 

Following ID: 2716   
"Nov. 8, 2024 - Aaron Tam 
Tong cable snapped when attempting to remove multipin connector bracket"

Repair went as follows:

• weighted clip attached to tong return side to tension/keep tapes on pulleys
• Manipulator was pinned from both sides (Pinning from master side first makes it easier to position slave side)
• clamps were used to suspend all tapes and cables near the relay bracket 
• extension tube limit clamps were moved to the top to stop it from dropping when Z motion tapes disconnected
• Z motion tapes/tension adjusting screws taken off master carriage and suspended with equalizing weight ~10+ lbs)
• Extension tube limit clamps and extension tube lowered give space to expose multiplier later 
• Wrist joint and handle removed as a unit 
• extension tube to multiplier screws taken out
• Extension tube raised to expose multiplier - using extension tube to wrist joint positioning clamp to keep it in place 
• Old cable removed
• new cable installed

installation in reverse with spare master handle 

Notes:

Spare master wrist joint was missing gears that connect wrist drums 

• this had to be disassembled and installed with gears from old wrist joint

Handle ratcheting pawl spring was not oriented properly, so this had to be disassembled and reinstalled properly (in the process one spring was lost Part#: A-5800)
 

 November 26, 2024 - Aaron Tam 

Handover from TPO and inspection

• Completed
• Some modification to the center Inner-Outer conductor had to be made (hole enlarged as tab was slightly short)

Target Insertion:

• Successful 

Target Mounting:

•  Upon fully seating UC#47 on service tray locating pins, the gas line VCR gasket came off 
  • Operator doesn't have line-of-sight to this area, so there has to be healthy clearance (Foreshadowing) 
  • Gas line VCR gasket reinstalled using manipulators  

• 2nd seating of UC#47 on service tray locating pins, the gas line VCR gasket came off again
  • Some alignment interference with the gas line coupling is the cause of the gasket falling off during placement (photo attached)
  • Gas line on service tray was loosened, raised to highest position and fastened (Photo attached)
  • Failed to re-install VCR gasket (Plastic separated from gasket material)
• Target removed from Hot cell to reinstall gaskets and make modifications to the gas-line coupling
  • Gas line coil plastically deformed to give less of a spring action so the coupling can stay down under friction until it is time to couple
  • Target carefully inserted into hot cell without disturbing spring/friction of gas-line coupling. 
    • This had to be repeated several times. Once for the waterline gaskets coming off, and a few other times to insert the target/tray without disturbing sprung coupling
• Target mounted without issue after the above steps successfully 

Gas and Water Services:

• VCR connections coupled 
• Leak test passed
  • leak test faster today because module had been left in silo for a long time to dry out. 
• Gas line no-longer needed, so was not checked

Electrical Services:

• Conductor bolts installed
• All bolts (including mounting bolts) checked for fit with mirror
• Coil conductor bolts torqued to at least 130inch-lbs 
• Electrical test completed 

Containment box panel reinstalled 

Cleared area around module for craning out. 

 November 27th, 2024 - Aaron Tam with Farran & David 

Parasitic Assembly Leak Check (Aaron, Farran, David)

-Note that the furthest upstream (right of the target) parasitic top cap screws had been loosened and retightened in error when attempting to remove it off TiC#9

-This puts this data point into question 

-Leak check starting from upstream to down stream 

-First parasitic had no leak 

-Second parasitic had some leak 

-Third parasitic was not pumping down at all

-First parasitic checked on test hose again with same success

Parasitic Dis-assembly (Aaron) 

-First parasitic had good tension in all 3 screws

-second parasitic had 2 screws with a perceptible breaking-loose of the screws, but one was imperceptible 

-Third parasitic had lower (than first parasitic), but okay tension in all 3 screws 

In an attempt to move the PEEK seal into a safe spot with tweezers, this one was accidentally sprung across the hotcell in the direction of the tool port 

A lengthy attempt to find it was conducted, but no PEEK seal was recovered 

This may effect our ability to do work during hot cell entries coming up. 

PEEK Seal extraction (Aaron, Farran) 

-A labeled bag was inserted into the hotcell via the tool port and onto an existing tray in the Hotcell

-PEEK seal placed inside bag, placed back on tray, and moved back to the tool port for extraction

-With tool port open, the draft was able to push the bag across the lift table. Changing the cross section exposed to the draft works to keep the bag from moving

-Farran used picker to extract the bag into the tool port where he wiped and placed into separate bag.

-This process was repeated for the second PEEK seal 

-Bags were wiped and swiped, put in another bag, swiped and brought over to Hot cell Service area Lab 

  Note: Ta#68 had a difficult install. See E-log ID# 2698 for more info 

First look:

• Containment box cover looks the same as previous (See:ID: 2697)
• Target shows large amount of soot-like deposits (See photos for locations)
• Deposits seem to have been left on parts of the service tray as well ie.: Multipin connector 

Removal:

• Removal was smooth
• Water-line bracket fixing bolts seemed loose even before I put a tool to them 

Eyes of sides:

• Better photos of where deposits are 
• Everything else seems normal 

 Abstract:
This target has seen some irregular beam patterns 
Possibility that the beam hit the walls of the target tube or even the cooling fins
This PIE we want to investigate how the irregular beam physically affected the target 

Related ELOGS: 
ID: 2728
ID: 2698

PIE was performed by Aaron Tam, Directed by Aurelia Laxdal, Observed by Lucas Backes, Special help from Chad Fisher 

External views:

• Windows are clear of any irregularities 
• More pictures of this can be found in RH-ISAC E-log 2728

Internal Views:

• Heatshield internal
  
  • Some discolouration from heat and soot deposits.
  • This seems to be fairly clean to normal amounts - not concerning 
• Target tube
  • tube is bent with the middle higher than the sides
  • Target tube was not removed 9/64ths allen wrench could not be located for this operation 
• Target tube Exit
  • Heatshield windows were punctured to reveal the target tube entraces/exits
  • Entrance is waterline side (ITE)
• Extraction electrode parts were removed from the back off the target
  • These parts look normal
  • some of the extraction electrode would not pull out due to tight fitting parts and the investigation stopped here.

Conclusion: Target physical condition is normal as far as we could investigate 

December 5, 2024 - Aaron Tam w/ help from Chad, Peter and Adam at the Crane  

Hot Cell Prep:

• Tools organized, working space cleared, spot for clean tool to sit placed, Air tool is open and spinning clockwise for tightening 

Loading:

• Ta#68 was loaded into pail# 300
• PEEK seal parasitic assemblies loaded (PEEK seals were removed in ID: 2724)
• Farran had some old samples that also went in (More details to come when Farran sends the info)

Lid/latching:

• This went smoothly

Bail attachment:

• Some difficulty in attaching the Lifting Bail, but went on smoothly with the help of Chad

Notes:

• One of the PEEK seal parasitic Target assembly lids was missed in the loading. This will have to be loaded next time. 
• All parasitic type targets remain in the yellow container shown in photos below. 

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. 

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.