A rotary limit switch was installed, attached to the shaft adjacent to the drive motor for the vertical drive system. This limit switch is not yet wired to the control system and operational - this will be done at a future date and the e-log will be updated.

Relevant electrical drawings: IRH2083 to IRH2085

Edit (2022-03-02): see e-log https://elog.triumf.ca/TIS/RH-ISAC/2309

An issue was observed in which the target hall crane was not functioning: the N-E-S-W and up/down motions did not work, however the rotation motion did work. These symptoms were similar to what was observed in the past under https://elog.triumf.ca/TIS/RH-ISAC/2039 and https://elog.triumf.ca/TIS/RH-ISAC/1845

The crane control console was not powered (i.e. pressing the ON/OFF buttons when the selector switch was set to remote mode, even when safety conditions were met, did not enable/disable remote functionality). The power supplies were checked and everything appeared to be powered as would be expected, except for items which depended on the main contactor (O-K1) being energized. This contactor needs the PLC to be in an operational state, fault-free. The PLC was checked and the red fault light was flashing. The battery light was not on (i.e. battery was OK).

The program was re-downloaded to the PLC. During an attempt to go online with the PLC, error code 0004h appeared (see attached image for description). This is an unfamiliar error code - typically the aforementioned symptoms arise due to a battery failure and the program being lost. In this case it is uncertain at this time what the cause of this fault is. It will be monitored in the future to determine if it occurs again, and further investigation will be performed.

After re-downloading the program and placing the PLC in RUN mode, the crane was fully restored to its operating state - the main contactor was able to be energized once again. The crane was put into remote mode and a brief functionality test on the motion axes was performed: OK.

TM4 was moved from ITE to SHC. Shield plug installed in ITE.

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

The spent UC#35 target has been moved from the south hot cell to the spent target vault. It was placed in pail #264 and put in spot 6A of the vault. See attached PDF for more details.

Two changes have been made to the control system to the South Hot Cell:

1. Addition of two emergency stop buttons: one located in the Target Hall on the wall adjacent to the hot cell, and one located on the control panel adjacent the operator station.
2. Addition of limit switches to the turntable's vertical drive system to prevent over-travel at both the upper and lower limits.

The emergency stops will both stop all turntable motion: vertical and rotational.

An update to operating procedures: in order for the vertical motion system to function, the limit switch cable must be plugged in. When plugging in the vertical drive motor to the wall outlet as per normal operating procedure, it is now required to also connect the limit switch (which is mounted near the motor on the driveshaft) to the cable coming from the appropriately labelled junction box on the South wall (M12 connector).

These changes are based on electrical drawings IRH2083 - IRH2085 and mechanical assembly drawing ITA6739. The changes have been commissioned according to commissioning plan Document-218490. The commissioning report will be uploaded to DocuShare. The work permit for this upgrade was I2022-02-15--3.

The annual inspection of the mini-storage vault was performed today. The following items were checked:

• Cabling and cable management
• Connectors
• Controls box - internal wiring and components, functionality
• Limit switches - functionality, wiring, mounting
• Motor
• Bearings
• Set screws
• Miscellaneous fasteners (some loose, but were tightened)

Everything appears to be in good working order.

Note: in the near future, the bearings should be greased. This is planned to take place during the next inspection of the main storage vault.

The motor cable for the storage vault was replaced as the old one was showing signs of wear. The U-track that the old cable ran through was also bent as a result of being hit.

In the process of replacing the cable, an e-chain was installed for cable management purposes. Mounting brackets were modified and a new U-track was installed as well. The new hardware is more robust than what was previously installed.

The vault door was opened and closed multiple times while observing the e-chain - everything behaved as expected. The system is operational.

Solidworks model IRH0189 is updated to show the changes

A modification was made to integrate the hot cell's lift table into the E-stop circuit. See work permit I2022-10-07-1

The E-stop mounted on the right side of the small enclosure adjacent to the operator station will now serve to stop the lift table's up and down motion, as well as the turntables up/down and CW/CCW motions. Functionality was checked by B. Webster (electrical services) and A. Newsome.

Note: it is recommended next time there is a hot cell entry to inspect whether or not the limit switch specified in the schematic is actually installed. The schematic should be updated to match the drawing.

Redlined electrical drawing photo attached to this e-log, and the paper drawing is left inside the lift table's control box. The schematic will be revised based on the redline updates, likes as part of work request #6342 (to integrate this drawing into the turntable controls drawing package).

TM4 was moved from ITE to NHC with C#4.

TM4 was moved from the North Hot Cell to the Target Conditioning Station with UCx#41.

C#4 spent target was moved to the storage vault, in pail 277. Dose rate at approximately 1 m when leaving the hot cell was 164 mSv/h. The pail has been placed in vault location 4C. See updated vault layout attached.

TM4 was moved from the Conditioning Station to the East Target Station with C#4.

The following five pails were moved to the mini-storage vault today under work permit I2022-12-16-1:

• #239 (formerly vault location 7A): 1.38 mSv/h @ 1m
• #245 (formerly vault location 6B): 1.56 mSv/h @ 1m
• #264 (formerly vault location 6A): 748 uSv/h @ 1 m
• #267 (formerly vault location 1C): 708 uSv/h @ 1 m
• #268 (vault location 7C): 809 uSv/h @ 1 m

The mini-storage vault is now full and ready for transfer to F-308 flasks.

The following measurements were made on other pails:

• #211 (vault location 3C): 4.21 mSv @ 1 m
• #217 (vault location 3A): 1.05 mSv/h @ 1 m
• #246 (vault location 6C): 1.98 mSv/h @ 1m
• #274 (vault location 1A): 4.78 mSv/h @ 1 m
• #228 (vault location 1B): 3.86 mSv/h @ 1 m
• #256 (vault location formerly 7A, now 7B): 3.60 mSv/h @ 1 m
• #260 (vault location 5B): 1.46 mSv/h @ 1 m

The target index spreadsheet has been updated to reflect these changes. See attached PDF print.

[edit 2023-01-03] The crane was powered back on this morning - there do not appear to be any faults and it seems that the crane was unaffected by the power outage.

The ISAC target hall overhead crane was powered off for the holidays. Note that this may result in the commonly observed PLC battery failure issue when the crane is powered back on in the new year.

The following three pails were moved from the main storage vault to the mini-storage vault:

1. #211, Ta#58 (formerly vault location 3C)
2. #217, ZrC#8 (formerly vault location 3A)
3. #228, UC#37 (formerly vault location 1B)

The target index spreadsheet has been updated.

The linear actuator used for the Y-motion motor assistance on the spare telemanipulator was replaced and tested. It was observed around September 2021 that the former one which was installed was causing fuses to blow for the main 120 VAC power supply in the control box. After some troubleshooting, it was determined that the linear actuator itself did not operate smoothly - it was suspected that this caused motor overload due to additional friction. This suspicion was confirmed by operating the linear actuator independently with a power supply and measuring current draw. The part has been replaced by Thomson PPA90-58B65-08NXXX. Note: this part took over 1 year to arrive since it was first ordered. The spare telemanipulator is confirmed operational.

Update 2024-09-11: noting that this was for serial number 9351

The spent target assaying turntable was repaired. It was tested today with a load exceeding the maximum it would need to handle during rotation (100 kg). It works as expected and is ready for operation.

The pail handling tool which is used to move 5 gallon pails around the target hall was inspected by A. Newsome, N. Jorgenson, and E. Lahe. The main tool as well as spare were checked for the following items. The tools are in good, working condition. It is noted that some fasteners on the hook assembly were slightly loose, but have been tightened.

• Inspect structural integrity of long tube - check for bending, warpage, dents, cracks, rust/corrosion
• Inspect structural integrity of hook assembly - check for bending, warpage, dents, cracks, rust/corrosion
• Inspect fasteners - check all fasteners installed as per drawings, fasteners are tight
• Inspect crane interface assembly - check for damage and wear where the tool connects to the crane
• Check alignment - verify the tool connects to the crane and hangs vertically with no major misalignment (this step was not done - alignment is regularly checked during operations, and there was no concern as the tube was straight)

 Note: these tools are being inspected monthly by D. Wang and F. Song.

 The emergency close mechanism for the Storage Vault door was tested by Travis Cave, Nadia Jorgenson, Adam Newsome, and Jason Zhang. The door was opened to its fully open limit, then closed with the emergency system. 

The test was successful.