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.

Both helium spray and helium pressurize on TM4 HS line withUCx31 target are done at SHC and TCS. No leak.

 UC#30 has been placed into the spent target vault, it was placed in pail 238 and in spot 1A of the vault. It was 81.5 mSv/hr when removed from the south hot cell. 

UCx#30 has been removed from TM#4 and put in a can with argon. 5(10) pin connector had to have guide screws removed to be uninstalled.

UCx#31 P2N installed.

 TM#4 with UC#30 has been moved from ITE to the south hot cell.

 Both the west entrance module and TM#2 with Ta#60 have been moved back into ITW.

 The West Entrance module has been moved to the south hot cell for repairs.

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).

 Graphite #1 along with the broke 2A2M19 wire scanner have been placed in the spent target vault see attached PDF for deatails.

Refilled TCS:TK2 from 10 in to 22 in using the newly installed valve.

Helium pressurize on TM2 HS line at TCS is done.    Base LR is 0.0X E-9 atm.cc/sec.  70 psi helium 3 minutes.   No response.   Also, The TCS vacuum pumping down over night is good. 

Electrical check and leak check at SHC. NO leak. electrical check ok.   Before target on, A is short to PQ, RU is short to HS ( 60KV bias) as we measured before.

 TM#2 with Graphite #1 has been moved from the conditioning station to the 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.

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

TM2 was moved from ITW to the Conditioning Station.

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

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.

 TM#2 with Graphite #1 has been moved back to the west target station from the conditioning station.

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