ITW - 2A2

o    2A2DSP-TC3 - not connected in El room

o    2A2COL-TC2 - does not work inside module

o    2A2COL-TC3 - does not work inside module

·         ITE - 2A3

o    2A3COL-TC3 - works, but plug needs repair in ITE pit

 Anders and I checked ITW and ITE thermocouple status. See result above.  Frank and I will fix the 2A3COL-TC3 loose cable to plug issue.

Dan and I did the SMP annual  maintenance service today. Lid open/close , vessel rotation and limit switch check, lubricate chains, tighten fasteners, and visual inspection.  Everything works fine.

An inspection was performed on drive systems for both storage vaults (main and mini) by Adam Newsome and Dan McDonald. The functionality was not tested. Overall, nothing concerning was discovered.

Main Storage Vault:

• Chain inspected (OK) and lubricated
• Gearbox inspected - OK
• All drive system set screws checked and tightened (note: chain drive screw slightly loose)
• Sprocket alignment checked - OK
• Limit switches checked - OK
• Emergency close mechanism cable checked - OK

Mini-Storage:

• Chain inspected - OK
• Set screw checked - OK
• Gearbox inspected - OK (need inventory/spare in stock)
• Roller wheels checked - OK

ITW TP1 can not be started yesterday. Also, TP1S was difficult to start , and had a high current draw after.  We changed both of them in pit today. TP1 and TP1S are started successfully after replacement.

Tested RF from RF driver into new IGLIS wires at ITE. Used 5V, 1MHz (2MHz setting because of internal halving issue).

As expected there was a very slight mismatch visible (original cable ~ 68 Ohms, new cable ~ 53 Ohms).

The matching resistor will be changed and it will be retested.

An electrical systems check was performed on the SMP by Adam Newsome and Travis Cave. Overall, there were no issues to note. The following is a summary of the inspection (Work Permit I2020-07-16-1):

- Checked condition of wiring for physical/radiation/UV damage
- Checked for cable tray debris or damage
- Checked inside control panel: components and wiring, labeling
- Verified camera views
- Checked connectors for damage
- Checked pendant for damage and verified labeling intact
- Checked limit switch wiring and condition

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

The test was successful.

 The West Entrance module has been moved from the west target station to the south hot cell for repairs.

Entrance module wire scanner has been replaced. Pictures to follow.

 The West Entrance module has been moved from the south hot cell back to the West Target Station.

A relay contact-based interface module was installed in between Safety Group's storage vault door enable junction box and Remote Handling's control module for the vault door.

The purpose of this module, which contains a diode bridge and relay, is to isolate the safety system from the control module to prevent back-voltage on the safety system which can damage the PLC's power supply.

In the new configuration, rather than receiving a 24 VDC signal from the safety PLC, this signal activates the relay, whose normally closed contacts supply 24 VDC (from internal) to the safety relay inside the control module. Wiring was modified inside the control module to account for this change.

In investing how to achieve the same functionality as before this change, it was determined that the control module's electrical schematic was not correct and did not reflect the actual wiring. A new schematic was created for this based on the actual wiring, including new changes.

The system was tested by locking out the target hall, and verifying that:
- No failure occurred on the power supply for the safety PLC
- This new relay actuated when the target hall was locked out (i.e. received signal from PLC)
- This new relay correctly supplied 24 VDC to the safety relay within the control module, allowing for the Opto-22 control unit to output control signals to the motors

Note: currently the soft limit switches for the vault door close/open have been bypassed. This is not a safety issue; the door can still be fully opened and closed remotely (but the open override and close override buttons are rendered useless). The bypass will be rectified in the coming weeks and this e-log will be updated accordingly.

Edit (Aug. 13, 2020): the issue regarding the limit switches has been resolved. The entire system is functioning as it was prior to the safety interface installation.

Tm2 and itw entrance module have been disconnected in ITW. I will attach disconnection checklist later.

TM2 was moved from ITW to the Conditioning Station.

ITW Entrance Module was moved from west station to South Hot Cell.

Entrance Module was moved from South Hot Cell to ITW Station.

Note: weight of entrance module, as shown via overhead crane's load cell, is 14,900 lbs.

Arthur installed a new Magna Power PS for the TGHT yesterday. The old power supply has been moved to Evaporator 2. The power supply was configured for remote operation and tested successfully with low current (30 A).

Left (short) is switched with bottom. So on module:

Frank and I removed the panel, disconnected the "Left"cable  inside panel,  and checked  cable to ground resistance. "Left "is dead short to ground on ohmmeter check still. So the short could be on cable or inside source tray.  Further investigation is planned to confirm the short  location.

The were issues with both left and right master ratcheting;

- the left handle was getting stuck in a close position when there was a higher ratcheting tension added

- the right ratcheting was not tightening preventing proper use of the manipulator

Chad and myself were able to identify a missing set screw for the tong cable.

Once this was added the issue with the left master ratcheting seems to be solved.

Lubricant was added to the left master ratchet and this seems to solve this problem as well.

There was also an observation of missing set screws on the spare manipulator for attaching the wrist to the ratcheting handle, which will need to be ordered and attached.

TM2 old source tray and TM4 optic tray are stored together in vault tray#9. The fielding measurement at SHC post 0.5 meter distance:
 

March 1st 2019, maximum 14.6msv/hr, minimum 4.78 msv/hr

Nov 2nd 2020, max 7.11m sv/hr, min 2.5msv/hr.