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.

TM2 has been moved from ITW to the South Hot Cell.

Reading at ITW: 114 mSv/hr

Reading at SHC: 85 mSv/hr

TM2 has been moved from the Conditioning Station to ITW. 

TM3 has been moved from the Silo to the South Hot Cell.

TM3 has been moved from the South Hot Cell to the Conditioning Station. No containment box.

TM3 was remotely moved from the conditioning station to the South Hot Cell. No containment box.

The Target Hall Crane has been shut down in preparation for the power outage tomorrow (Dec 22). Power will be restored on Dec 23.

Dec 23 update: power has been restored. The crane appears to be in working condition as there is no fault indicator on the PLC.

24/Noc/2020

USB was discovered to be in the reverse direction and will need to be change around to become operational

01/Dec/2020

USB was pulled from conduit

While attempting to re-pull the USB in the correction direction, the ethernet cable was damaged and need to be replaced,

(thanks to the Hubert's team for the wire help) 

It was decided that it was too problematic to re-pull the wires with all other wires in the way. Therefore all the wires were removed from the operator control panel, and pulled so that the USB, USB power cord, and ethernet could be re-pulled all together.

However, even once all the wires were re-pulled and reconnected it was discovered that the USB had become damaged, and was removed again.

23/Dec/2020

- A new conduit was added through to the NHC, for only the USB

- USB was fed through, reconnected, and tested

- Putty will need to be added around the conduit to ensure a good seal into NHC