Roof blocks IRH1641, IRH1642, IRH1643, and IRH1644 have been fully assembled, labeled, and installed as per drawing IRH1652.  Fabrication of TCS shield block (IRH1646) and NHC module port block (IRH1645) is still in progress.

 The BIAS voltage was brought up to 70 kV today and held there for 1h. No sparking observed.

TM4 HS line leak checks are done, at SHC and TCS. SHC: Helium spray. TCS: Helium  pressurize 70psi.  LD base LR 0.0 X E-9 atm.cc/sec.  No leak has been found on both leak checks. 

TM4 has been connected at TCS. TCS water system has been started for TM4. TM4 and TCS vacuum pumping down is good so far.

Argon vent and disconnect TM4 at TCS.

TM3 is located at TCS and it is pumping down now. TCS water system has been started.  All TCS water lines for TM3 module internal cooling are bypassed and looped at TCS top ground plate. Water only supply to TCS high  current conductors.

Preparing vent the TCS/TM3. We will remove TM3 service tray cover plate  after venting.

TM3 service tray cover plate has been removed. It is bagged and placed to TH b2 level south wall beside the silo.

TCS and TM3 all vacuum pumps are started. Everything is fine.

Entered hot cell to preform replacement of slave tong cable. Existing cable shows no signs of wear so it has been re-installed. A spare tong cable has been loaded into a spare tong while in the hot cell in preparation for next time this cable needs to be replaced.

Broken insulators ITD0053 and ITD0054 have been uninstalled from TM2.

Insulators ITD0053 and 54 have been replaced. All fasteners torqued to 56 in lbs.

Chad and Anders inspected the Source Tray today using the camera in the hot cell. A dark spot was observed on one of the four insulators separating the Extraction Electrode from the Ground Electrode. This could potentially influence the high leakage current. Some discolored areas were also observed in the Service Tray, but these was present when the module was built. See attachment for details.

Two side panels on TM2 service cap were removed for TM2 service cap inside inspection. A piece of cable tie was found inside cap closing to service tray entrance area. All blue nylon insulators are inspected. They look good. The broken cable tie is moved out of service cap.

 Panels are installed back after the inspection.

See attachments

TM2 containment box has been removed. Found a piece of capton tape or tubing under table (see picture).

  I did helium pressure test on TM2 containment box window and HS line at TCS. @ 70psi helium  for 3 minutes, HS:2.2XE-7 atm.cc/sec., Window:1.2XE-7 atm.cc/sec. There is no change on HS. But LR on window is bigger than before that was in E -9atm.cc/sec range.  

 Due to problems with the regulating valve WPV1, the VFD (Variable Frequency Drive) for the pump has been programmed to do a slow (2 min) ramp up. WPV1 has been bypassed and left fully opened. Work was done by Dave Morris

David installed the new ball valve and connections for the SAS project module move ventilation. SASP0482. Drawing reference ISK5029B.

 The NHC module port shield block (IRH1645) and the TCS vessel shield block (IRH1646) were installed yesterday in the target hall according to assembly drawing IRH1652.  No issues were encountered during installation.  Vacuum was pulled on the TCS and a leak check was performed on the shield: no leaks found.

The 4" PVC drain line in the ISAC-1 active sump was modified so that the drain pipe terminates below the low level water line of the automatic pump-out system.  This will prevent backflow of sump gasses into the SHC, NHC, or TCS space if the air pressure in any of those rooms are lower than the sump air pressure.  The details of the modification were specified by Mechanical Services Group, and the work was done by Paul Jensen.  This system is defined in drawing IAM19183.