hot items have been moved and shielded as much as possible. Field at left manipulator has been reduced from 560 uSv/h to 85 uSv/h.

Tuesday, June 26 the broken tong cable was replaced on the west manipulator in the south hot cell. Wednesday the tong cable was preemptively replaced on the east manipulator of the south hot cell.

At the end of manipulator repair Thursday the ventilation pre-filter in the hot cell was changed. Old filter remains in the hot cell until such time as it can be removed.

Annual ITW water signals interlock check are done. Everything works good.

Installation of the diagnostic connections between the NHC hot and cold sides has been completed.  The cable bundle was prepared by Travis Cave in the electronics workshop with connectors attached at one end only.  Metal fish tape was first ran through the conduit from the cold side to hot side, the non-terminated end of the cable bundle was attached to the fish tape inside the cell, cable pulling lubricant was applied, then the cable bundle was pulled through the conduit to the cold side, and the cold side terminations were then made.  For future replacement of the cables and connectors the same method should be used, and a minimum of 6m of cable length.  Connector details can be found on drawings IRH1765 (hot side) and IRH1767 (cold side).  Conduit is 1" trade size PVC type (PO#3041531). Wiring details for each connector are attached below:

9 pin CPC connector:

Pin 1: Brown
Pin 2: Red
Pin 3: Orange
Pin 4: Yellow
Pin 5: Green
Pin 6: Blue
Pin 7: Violet
Pin 8: Black
Pin 9: No connection

All wires 14 gauge. 
Connector PN: Amp 211768-1
Cap PN: 208652-1

4 pin CPC connectors:

Pin 1: Coax RG-179
Pin 2: Red (18 gauge)
Pin 3: Black (18 gauge)
Pin 4: No connection

Connector PN: Amp 206430-1
Cap PN: 208800-1

SHV:

Connector: IRH1769 (customized "Kings 1709-1" connector)

USB:

5m long powered USB 3.0 cable
Connector: IRH1770 (customized "TE Connectivity PC4B0100-15NY-1-C" connector)
Cap PN: USBFTV 2 N

Ethernet:

Wires installed in the following order when viewing the back side of connector with PN lettering right-side-up:

Connector PN: Tyco 1546877
Cap PN: 208652-1

 Yesterday the spent UC#22 target was moved from the south hot cell to the spent target vault. It was placed in pail #167 and placed in spot 4A see attached PDF for details.

 On July 30th the NHC diagnostic signals were tested:

- 9 pin CPC: a shorting plug was installed on the hot side - continuity check results were as expected

- 4 pin CPCs:  snake camera installed in both hot side connectors with portable monitor on cold side - both connectors worked as expected

- USB: laptop connected on hot side, USB mouse connected on cold side - worked as expected

- Ethernet: laptop connected on hot side, cold side connected to building ethernet port - connection to network worked as expected

- SHV: a shunt was installed on the hot side - a short circuit was measured from the cold side as expected
            with no shunt installed the line was Megger tested: 1.63 G-ohms recorded @ 1000V

The control panel switches for the in-cell receptacles were also tested.  Each switch (a - d) worked as expected.

On July 31st the gas supply solenoid valves were tested.  60psi air was hooked to each solenoid inlet.  With the valve closed there was no air flow.  When each push-button or switch was activated air flow was observed through the correct solenoid.

I did a helium pressure test on TM2 HS line at TCS. At 70psi helium, the leak rate is 2.5 xE-7 atm.cc/sec. I think this is the number that close to result before which is 1.7xE-9 atm.cc/sec. WE know there is a small leak on this water block seal. Chad  and I did helium  spray check yesterday at SHC. It was good at bottom scale.  No much worry on this low E-7 range leak.

 The spent Nb#8 target was moved from the south hot cell to the spent target vault. It was placed in pail #168 and place in spot 2A in the vault. See the attached pdf for vault details.

 The west entrance module has been moved from the west target station to the south hot cell, for a bellows replacement.

 Ta#56 has been moved from the south hot cell to the storage vault. It was placed in pail#169 and place in slot 2C of the vault. Also the vault is now full with 24 spent targets and can no longer accept any new targets. See the attached PDF for further details.

 Targets SiC#34 , Ta#45,46,47,50 have been moved from the spent target vault to the mini vault.

Testing was completed today on the NHC air and gas supply lines.  For each line a Staubli plug was installed on the fitting inside the hot cell, the line was charged with compressed air (50psi for gas lines #1, #2, and #3;  100psi for the air lines #4 and #5).  All connections inside and outside the cell were checked for leaks using Snoop including connections for the solenoid valves.  No leaks were found.  Correct operation of the solenoids was confirmed as well as correct plumbing (no lines crossed).

 Installation of of operator-level lighting in the NHC was completed today according to drawing IRH1801.  2" x 2" Panduit was mounted to the wall on aluminum brackets to support the power cables.  These lights can be replaced remotely by unplugging the power cords using the manipulators, lifting the cable out of the Panduit with a hooked pole tool through the manipulator slave end removal roof hatch, lifting the light fixture off the support bracket with the pole tool, then installing a new fixture in the opposite order.  This RH procedure will be tested at a later date as part of NHC commissioning.

 The following equipment has been connected to the building ground located in the Target Hall by the TCS using 1/2" flat bonding strap:

• NHC roof structure
• NHC/TCS partition wall
• NHC work table

The following equipment has been connected to the building ground by connecting to the work table inside the NHC using 1/2" flat bonding strap:

• Air and gas supply line mounting bracket inside NHC
• Receptacle box mounting bracket inside NHC
• Diagnostic signal box mounting bracket inside NHC

The resistance between the following locations and the copper grounding plate located at the base of the NHCSA north wall were measured.  The resistance of the wire used was 258.10mΩ, and has been subtracted from the following results.

Measurements taken in NHCSA:

• Control panel below viewing window (base plate of box): 4.67mΩ
• Oil window frame (bare metal drain valve): 55.34mΩ
• Left manipulator (ground plate near e-stop button): 73.46mΩ
• Right manipulator (ground plate near e-stop button): 202.58mΩ
• Air and gas supply line mounting bracket: 40.68mΩ
• Diagnostic connector box: 12.15mΩ
• Steel conduit for 110V supply to hot cell interior: 4.81mΩ

Measurements taken inside NHC:

• Work table: 4.51mΩ
• Pre-filter bolted to partition wall: 4.84mΩ
• Table hatch lid: open load
• Left manipulator thru tube: 515.8mΩ
• Right manipulator thru tube: 342.0mΩ
• Left manipulator (slave boot plate bolt): 885.9mΩ
• Right manipulator (slave boot plate bolt): 1444.0mΩ
• Grounding strap for air/gas plate: 4.84mΩ
• Outside of SHV connector on diagnostic signal box: 4.56mΩ
• Exterior of 110V electrical conduit: 3.88mΩ
• Male Staubli connector for 1st gas line: 53.7mΩ
• Welded stud for window cover panel: 6.06mΩ
• Grounding strap for partition wall: 4.39mΩ
• Roof structure (measured inside un-painted bolt hole): ~0mΩ
• Stainless steel module flange: ~0mΩ

Dedicated grounding will be added in the near future for the oil window frame and the manipulator thru-tubes.  Testing will then be repeated for those items.

Dec 18, 2018 update:

The oil window frame and both manipulators (where they bolt to the thru-tubes) were connected to the building ground using 1/2" flat bonding strap connected at the cold side of each piece of equipment, and running to the grounded copper sheet located in the NHC service area at floor level.  The connection is made inside the electrical racks located directly west of the NHC operator area on the cold side.  This work was done by Travis Cave in October 2018.

Mili-ohm testing for these items has not yet been repeated.

Jan 14, 2019 update:

Grounding was added from the metal plate near the e-stop button on the master arm of both manipulators.  The same 1/2" flat bonding strap was used which was tied into other bonding strap which runns to the grounded copper sheet in the NHCSA.

Mili-ohm testing was repeated for the following items:

• Oil window frame (bare metal drain valve):  13.6mΩ
• Left manipulator (ground plate near e-stop button):  16.1mΩ
• Right manipulator (ground plate near e-stop button):  16.5mΩ

 The spent UC#23 target has been moved from the south hot cell to the spent target storage. It was placed in pail #170 and place in spot #4B in the vault.

The south hot cell window has been found to be leaking oil. Upon inspection yesterday I found that the bolts compressing the gasket on the cold side were "loose". I have re-torqued them to the specification provided by the manufacturer in the attached procedure.

 UC#24 has been moved from the south hot cell to the spent target vault. The target is in pail #171 and placed in spot 4C. See attached PDF for details.

 ITW Exit #2 has been moved from the west station to the south hot cell for a bellows repair.

Cover 1 was removed from the exit module. Confirmed with David that the actuator rod that needed to be disconnected was the far left )as viewed by the hot cell operator). The fastener for this rod was un-accessible from this side. Cover 1 was re-installed (two bolts left loose) and cover 2 was removed. fastener holding the actuator together was removed and luckily it does have a remote start.