 Wednesday, January 24, 2024, 08:34, chad fisher, South Hot-Cell, Repair, TM4, UCx#43, Plating and coating from UCx#43 failure 
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TM4 has seen significant coating of the main standoff insulators and various other components stemming from failure in UCx#43 target. See attached pictures
showing coating on containment box, support frame, main standoff insulators, standoff insulators high voltage shield etc. Note tracking marks on main standoff
insulators. |
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Wednesday, April 03, 2024, 10:48, chad fisher, South Hot-Cell, Maintenance, , , SE Manipulator wrist swap
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On April 2, 2024 the wrist on the SE manipulator of the SHC (Serial # 7986) was swapped with a rebuild unit originally from SW position (serial # 8106).
The "new" wrist was a wrist + tong assembled unit with the tong cable being routed if-front of the spacer A-14118 rather then behind as in all
previous replacements (see attached pictures). This change was a result of a discussion with Central Research's senior repair technician who informed us |
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Friday, May 24, 2024, 08:10, chad fisher, South Hot-Cell, Standard Operation, TM4, UCx#45, UCx#45 Installation
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On Wednesday, May 22, 2024 UCx#45 was installed on TM4 in the SHC. Installation was normal other then minor issue with the multipin connector drive screw
not engaging and/or driving properly. This was remedied by loosening the left guide bolt slightly (1/2 turn). After loosening the multipin drove in and
seated correctly (verified by camera). High current fasteners torqued to 130 in lbs. |
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Monday, September 16, 2024, 08:23, chad fisher, North Hot-Cell, Repair, , , Model N Remote end #9352 reapir
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On Friday, September 6, 2024 Model 'N' remote arm #9352 was removed from the NHC right side installed position to investigate an ongoing issue
with the tong motion circuit (no motion on the remote side when handle on operator side operated).
Inspection revealed that the tong cable on this arm have hopped its cable drum and rapped around the shaft of the cable drum. As well, the tong |
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Monday, September 16, 2024, 08:48, chad fisher, Manipulator Maintenance, Maintenance, , , CRL Technicain Manipulator Maitenance Trip
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Over the course of September 9th - September 13, 2024 a CRL manipulator technician carried out the following manipulator maintenance:
NHC operator side arm #9763 (right side installed position) - Inspection and re-tensioning of tong cable prior to re-installation (was a little
too tight). Operational. |
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Wednesday, January 08, 2025, 07:37, chad fisher, South Hot-Cell, Standard Operation, TM4, UCx#46, UCx#46 removal
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| UCx#46 removed from TM4 and placed into a pail back-filled with argon. Nothing visually unusual; no issues. |
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Wednesday, January 29, 2025, 11:10, chad fisher, South Hot-Cell, Standard Operation, , , Pre-entry field Check
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Fields in the hot cell were checked using a pole monitor. Field approximately in the area someone would stand to repair manip. is 3.8 mSv/h
Hot item found! Bag with extraction electrode and high current fasteners from an online target. |
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Wednesday, January 29, 2025, 11:39, chad fisher, North Hot-Cell, Repair, , , Model N Remote Arm #9342 Tong Cable
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Model N remote arm serial #9342 tong cable has been un-jammed from between pulley 3D (see picture) and casting (this is an ongoing issue with #9342 and
9352) and cable restrung and exercised to check motion. Tong system is now functional but exhibits excessive slack. Next step will be to check tension
of the elevation/twist cables and adjust the pulley block if required (this pulley block houses both the elevation twist cable pulleys and the tong cable |
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Tuesday, February 11, 2025, 10:36, chad fisher, South Hot-Cell, Repair, TM2, , Conductor Block Insulator Replacement
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Ceramic conductor blocks ITD0053 and ITD0054 were replaced on TM2. Initially, only ITD0053 was to be replaced but after removing it it was noticed that
ITD0054 (the larger conductor block behind it) was also broken, fractured through the helicoil that retained ITD0053 (see attached picture).
Both the old 53 and 54 fell into multiple pieces upon removal (see attached photo). |
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Thursday, February 20, 2025, 11:29, chad fisher, South Hot-Cell, Standard Operation, , , Field Check
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After removing the previously found extraction electrode and other suspect components the field at the manipulator tongs (in front of the window) in
still 3mSv\h.
I have been through every bin etc in the hc and even emptied the dust seperator canister of the vacuum. I will use the camera to look under the |
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Friday, April 11, 2025, 13:34, chad fisher, North Hot-Cell, Repair, , , remote end 9342 installed
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On March 27 remote end 9342 was installed on the west position (right hand as viewed by operator) and arm 9764 removed and moved to anteroom.
Previous to this installation, arm 9342 received tensioning of the elevation twist pulley block and tightening of the tong cable opening via the
tong cable drum. Tong opening was reduced to roughly 2" to achieve tension in the tong cable such that slack upon release of the system was reduced |
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Friday, April 11, 2025, 13:46, chad fisher, North Hot-Cell, Repair, , , Remote end 9**4 repair
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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 |
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Monday, May 05, 2025, 09:18, chad fisher, North Hot-Cell, Maintenance, , , Manipulator Remote End Replacement 9352 with 9764
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Remote end 9352 replaced with end 9764 due to signs of an issue with the tong cable (tong opening excessively large and slack in cable on one side).
Upon replacement tong opening on 9764 also opened larger then the remote end was set to. Everything is operational but this phenomenon indicates the handle
cable system on operator side must be where the excess is coming for. This is further indicted but the position of the locking screw on the handle cable |
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Friday, May 23, 2025, 13:12, chad fisher, Manipulator Maintenance, Repair, , , SHC West manipulator tong cable replacement
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Broken tong cable on West manipulator (serial #8106) replaced.
Wrist joint with broken cable was replaced with the spare wrist joint, pre-strung with a new tong cable. Tong cable is routed the "new"
way (as described in April 3, 2024 wrist replacement), over the interior spacer. |
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Tuesday, June 21, 2016, 13:47, Travis Cave/ Dan McDonald, Spent Target Vault, Repair, , , Spent Target Vault Door
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The spent target vault door does not open or close. The emergency door closing did have to be used to close the door as it was locked in an open position,
the door stopped just off the open override limit. The door was closed and the spent target that was being assayed was placed into the mini storage. The
problem with the door appears to be related to the motor itself, as all the controls to the motor appear to be in working order. Also it was noticed on |
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Tuesday, July 19, 2011, 11:17, Travis Cave, South Hot-Cell, Standard Operation, TM4, Ta#35, Move of TM#4 from East target station to south hot cell.
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| Move went well no problems readings at East Target Station were very high at 500mSv/hr. |
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Tuesday, July 19, 2011, 12:02, Travis Cave, South Hot-Cell, Standard Operation, TM4, Ta#36, Electrical check
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| See attached PDF for the details. |
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Wednesday, July 20, 2011, 09:55, Travis Cave, ITE, Standard Operation, TM4, Ta#36, Move of TM#4 from South Hot Cell to East Target Station.
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| Move completed, move went well. |
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Monday, July 25, 2011, 14:49, Travis Cave, Spent Target Vault, Standard Operation, , Ta#35, Spent target move
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Ta#35, in pail #88, has been place into spent target storage, in spot 6C. Upon removal from the South Hot Cell it was 411mSv/hr our hottest target to
be placed into storage to date. There are 8 free slots for targets left in the vault. |
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Wednesday, July 27, 2011, 14:34, Travis Cave, South Hot-Cell, Standard Operation, TM1, , Module move
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| TM#1 has been moved from the Conditioning Station to the South Hot Cell for the installation of Ta#37. |
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