The NHC right side monitor has been wired to display the signal from the in-cell camera.  This was tested using a snake camera on both of the CPC-4 connectors.

 Franco Mammarella was consulted regarding electrical grounding of the NHC design (RS103 of Document-131915).  After discussing the design, and having grounding inspected by Randy Boehm, Franco approved the design and advised that the grounding system should be inspected periodically.  This task has been added to the Remote Handling inspection index on an annual schedule.  A PDF copy of the e-mail correspondence with Franco is attached.

 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 North Hot Cell gas delivery lines (labeled 1, 2, and 3 on the hot and cold side panels) were leak checked today.  5psi helium gas was applied to each line in turn with the appropriate solenoid valve opened and a Staubli connector with plastic tubing and the leak check wand attached to the matching connector inside the cell.  The end of the wand was sealed using tape.  The Agilent G8601 leak detector was used on "sniffing" mode to check for escape of helium gas from all joints and connectors.  With the sniffing line attached the leak detector test port pressure was 3.9E-1 Torr and the baseline leak rate was 1.7E-6 Torr*L/s.  There was no response while testing all of the three lines.  For all three there was a leak detector response after disconnecting the Staubli fitting, which confirmed that the lines were properly charged with helium.

 The North Hot Cell ducting (IRH1617) has been sealed with a bead of Sikaflex 1a polyurethane construction sealant where the flanged connection bolts to the NHC/TCS partition wall.  When this sealant shows signs of aging it may be cut away and re-applied without unbolting the flange.

The fields in the NHC after removal of Ferran's graphite sample is 238 uSv/h. This again seems to emanate for the items in the 5 gal pail...the copper tubing from the beam window or, as I mentioned in my previous elog, the peek samples. I did ask about removing these during the graphite sample removal but was told they were not "hot".

NHC was entered on April 17, 2023 for inspection and maintenance. Summary :

Compressible and non-compressible waste was loaded into a 55 gal drum and removed from the NHC. This same drum will be inserted into the SHC at a later date to be sorted, compressible waste compressed, and drum filled more.

Manipulator remote end tong cables checked. Tong cables didn't show any wear but both east and west had tong cables had hopped off the third highest pulley (see detailed write up . This was fixed by tying the tongs in the closed position to provide slack in the cables then inserting a t-handle through the wrist and offering the cables back onto the pulleys. Cable hopping is most likely due to aggressive ratcheting and releasing of the tong during operation.

Manipulator booting flanges were removed from both manipulators as it was previously found that  the booting interferes with access to the inside of the containment box so it could not be used. Flanges were remove to provide even more clearance.

Containment box cover removal arm - linkage fasteners were removed one at a time and blue locktite added then reassembled and tightened appropriately to allow arm to swing freely (see detailed write up) . Lack of locktite during initial assembly was allowing fasteners that pass through bushings into the linkage arms to loosen over time/cycling.

Exhaust pre-filter changed.

Target insertion jig - The target insertion jig was rumored to had a missing fastener. A loose nut was found that appeared to belong to it but after much inspection a location for it could not be found...i.e. all parts appeared to be counted for. During this inspection it was noted that some over the fasteners in the main hinge were loose. Again these were removed one at a time, blue locktite added and fasteners tightened to allow proper movement (see detailed write up).

Window inspected for leak. No sign of any leakage from the "hot" side.

 The new ducting section connecting the existing duct termination in the TCS space to the NHC partition wall has been installed by Smith Sheet Metal contractors.  The installation drawing is IRH1618.  There was not enough clearance between the duct pipe and the TCS vessel to butt weld the new ductwork as originally intended.  Instead a flange was welded to the existing pipe and also to the new section and the two were bolted together.  Drawings of the modifications have been provided by the contractor, and as-built drawings will be completed at a later date.  There was not time for the contractor to fabricate a gasket for the flanged joint, so one will be installed by TRIUMF at a later date and included in the as-built drawing package.

 The NHC drain line was tested by pouring approximately 10 gallons of water through the drain grate at the base of the NHC partition wall.  Water was seen a few minutes later pouring into the sump labeled "ACTIVE SUMP" from the light coloured pipe on the west side of the inside of the sump.  Rob Walker had previously said that the hot cells drain into the sump next to this one which is labeled "SANITARY SUMP", which appears to be incorrect.

 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.

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

To satisfy RS 101 from the NHC requirements specification (Document-131915) Tomislav Hurskovec was consulted regarding high voltage safety.  After a verbal discussion on various aspects of the NHC design he confirmed that the design satisfies high voltage safety concerns.

A copy of his confirmation e-mail is attached in PDF format.

The NHC module support flange cameras (4 total) as well as the NHCSA camera were tested today and confirmed to be working properly.  All cameras were angled and focused properly, and displaying clearly on the monitors in the ISAC RH Control Room.  Photos of the control room monitors are attached below.

 Installation of new flow sensors and transmitters for the NHC and SHC duct lines was completed in the target hall today.  The sensors are Dwyer DS-300-8 in-line sensors for 8" pipe; The transmitters are Dwyer MS0121 magnesense differential transmitters with 4-20mA output.  The transmitters will be wired to the new PLC control system when the upgrade is done.

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).

 Measurements were taken today of the NHC north/south wall gap at the location where the NHC/TCS partition wall will be installed (43.375" from the NHC west wall).  A HILTI PD40 laser range meter was used for the measurements.  They were taken at 10", 34", 62", 90", 118", and 142" from the floor which matches the top of each cross-beam.  The results are below:

10" from floor:  102.44"
34" from floor:  102.40"
62" from floor:  102.48"
90"  from floor:  102.63"
118" from floor:  102.28"
142" from floor:  102.24"

Based on these results a partition wall plate width of 102.00" will be used for the bottom two plates, and 102.25" for the upper three plates in order to keep the gap on each side approximately 1/8"

The sheet metal panel covering the NHC/SHC feedthrough port was removed today using a slide-hammer to pull out the concrete anchors (this oversized panel would have interfered with the NHC partition wall).  50cpm was found on the inside of the panel, 100cpm on the NHC side lip of the feedthrough, and 350cpm on the face of the shielding bricks in the feedthrough.  Various dimensional measurements of the feedthrough were taken which will be added to the partition wall Solidworks model (IRH1609).  The panel was bagged for disposal and a temporary 20"x20" panel was put over the feedthrough and secured with duct tape.  A permanent panel with anchored supports that is compatible with the NHC partition wall will be designed and installed at a later date.  A swipe of the NHC walls and floor picked up 30cpm after completion of the job.  

The pin on TM4 has become loose again, making it very difficult to remove the multipin connector with the last target, C#4. For the installation of the next target, UCx#41, we will drill out the hole on the target side bracket so that it doesn't contact the multipin pin. Will try to remove this pin by force in January, or if needed change out the whole multipin bracket.

Well the first of this year's lucky winners to win a fabulous one way trip to Chalk River are as follows. UC#1, UC#2, Ta#25, Ta#26, and Ta#37. First these lucky winners will get to stay several days and night in the lovely all inclusive mini vault before being loaded in to their very own private F-308 flasks to be whisked away off to fabulous Chalk River.

Five targets were moved to the mini storage today in preparation for transfer of the targets to the F308s later next week. The moves went well. See the attached files for the vault and mini storage details.