Two changes have been made to the control system to the South Hot Cell:

1. Addition of two emergency stop buttons: one located in the Target Hall on the wall adjacent to the hot cell, and one located on the control panel adjacent the operator station.
2. Addition of limit switches to the turntable's vertical drive system to prevent over-travel at both the upper and lower limits.

The emergency stops will both stop all turntable motion: vertical and rotational.

An update to operating procedures: in order for the vertical motion system to function, the limit switch cable must be plugged in. When plugging in the vertical drive motor to the wall outlet as per normal operating procedure, it is now required to also connect the limit switch (which is mounted near the motor on the driveshaft) to the cable coming from the appropriately labelled junction box on the South wall (M12 connector).

These changes are based on electrical drawings IRH2083 - IRH2085 and mechanical assembly drawing ITA6739. The changes have been commissioned according to commissioning plan Document-218490. The commissioning report will be uploaded to DocuShare. The work permit for this upgrade was I2022-02-15--3.

Dan lubricated components on the target storage vault (This was an outstand task from annual inspection). No issues on the main storage vault but we were not able to lubricate the mini storage vault because the position of the grease nipple on the fittings makes them inaccessible, see attached pictures. All four should be replaced with 90 deg fittings. 

September 18th

The wiring harness was completed by Maico and Travis today (see pics) and was installed into the target module. During installation the bracket went on with ease. The junction box appeared to be hung up on something but did engage eventually. The plug for the collimator is not quite long enough for the manipulators to install completely. I was only able to get it to just engage by sneaking the manipulator in from the shutter side and then pushing on it with a long rod. The wiring for the collimator is several inches too long but does not interfere with anything. The remote installation of the wiring to the IMG gauge was easy but there at least 1 foot of extra wire and with the thicker gauge it has a mind of its own. I was eventually able to wrap the wire under the table before so it will not interfere with anything. The module side junction box bracket was not clamped to the table I was able to do up one bolt but other one was blocked by the new steerer strain relief. There is no requirement for both to be done up.

September 19th

Travis completed and electrical test this morning and it was found that coil 1 touches coil 2 touch each other very slightly. By inserting a piece of cardboard between the closest water block and the lines we no longer in contact and passed the test. Once the cardboard was removed the lines remained separated but if touched slightly they would spring back into place and make contact. There was some debate as to if we should make a custom part to separate the line or if we should attempt to tweak the lines. I decided that it is known that a very small change in the position of the module will cause separation between the lines, that we should attempt to tweak the lines. I braced the lines with one manipulator to prevent loading the ceramic while Maico "tweaked" the line. The line was successfully moved to cause separation. Maico and I then completed a visual inspection of the remaining water blocks and noticed that the ground electrode cooling lines are estimated 1/8" away from one of the module side coil lines. All other places that can easily be inspected appear to have enough clearance.

Travis and Don then completed an electrical check again (https://elog.triumf.ca/TIS/RH-ISAC/457). This module still failed the test but as noted not due to continuity rather lower than infinite resistance from the coil to coil and positive coil to 60kV common. This indicates that there is dirty or failing insulation that is either from the fiber glass wrap or something within the service tray. From inspection from outside the hot cell the best guess as to where this is happening is just before to after the exit of the water lines from the service tray but there is no way to confirm this.

Although the module may be able to run for a period of time with these resistances the insulation may continue to break down and there is the risk that during a module move the lines may shift and touch again. This combined with the known HV issues of TM3 paints a dark picture of the service tray.

Friedhelm and Lia have been advised of these recent results and have decided to continue with the installation of the target and conditioning of the target. Should the module be able to operate and extract beam it will be installed in ITE. Friedhelm also came for a visual inspection of the module and agreed that the issue is on the module side and that the lines are too close to tell exactly where the issue may lie. The possibility of separating the the blocks with further insulation was discussed but there is limited area that this can be completed remotely. In addition to this there is no indication that further insulation/bracing will improve the problem and there is considerable risk that it could make the issue worse.

Installation of the containment box started this afternoon and is completed other than the tightening of the window VCR joints. 

September 24

 After the manipulator repair Maico installed the NiO#2 onto the target module. Once connected I completed a leak test on the HS line with Isaac. The leak testing cart would not pump down originally (something wrong with the cart) but eventually it did start to work. The cart pumped to its lower limits and did not respond even with the module was flooded with helium. A electrical test was then conducted by myself and and Don Jackson (see attached). During the standard test the Target to Anode and to 60kV common read lower than expected at ~47Momh @ 1kV. Also of note during the conductance check the measurement from c-d was low at 1.82 mohm.

3  additional tests were completed 2 of which were coil to common (both sides). The resisance was measure at 47 ohm with the megger and 1.32 Kohm with the uohmmeter. The coil lines lines were also measured to get and indication of the resistance of a copper line. These lines were measured while they were not jumpered both the coil + and coil - measured 5.73 mohm.

A meeting with Lia and Friedhelm was held and and the decision was to move the module and test it in the conditioning station. Fingers crossed that the module will still work.

Sept 25th

Maico finished installing the cover today for the module to be moved. Other elogs cover the other activities for today.

Bevan Moss wrote:

September 24  After the manipulator repair Maico installed the NiO#2 onto the target module. Once connected I completed a leak test on the HS line with Isaac. The leak testing cart would not pump down originally (something wrong with the cart) but eventually it did start to work. The cart pumped to its lower limits and did not respond even with the module was flooded with helium. A electrical test was then conducted by myself and and Don Jackson (see attached). During the standard test the Target to Anode and to 60kV common read lower than expected at ~47Momh @ 1kV. Also of note during the conductance check the measurement from c-d was low at 1.82 mohm. 3  additional tests were completed 2 of which were coil to common (both sides). The resisance was measure at 47 ohm with the megger and 1.32 Kohm with the uohmmeter. The coil lines lines were also measured to get and indication of the resistance of a copper line. These lines were measured while they were not jumpered both the coil + and coil - measured 5.73 mohm. A meeting with Lia and Friedhelm was held and and the decision was to move the module and test it in the conditioning station. Fingers crossed that the module will still work. Sept 25th Maico finished installing the cover today for the module to be moved. Other elogs cover the other activities for today.

 Also of note the turbo pumps were started on the conditioning station around 1:30. Don and Travis completed and electrical test, see other elogs. When attempting to start IG1 the controller indicated there was no filament, this gauge only has 1 to start. It will have to be replaced when the module is next vented. In addition to this it appear the PNG1 controller has failed again. I have emailed Dimo to see if we can get one to test. The img100 is new and different cables have been used. All 4 options for connections were also tested in case of a wiring mistake.

 September 20th

Today was a trying day. When attempting to make the water line connections for the window the VCR seal fell off several times. Each time this happens the seal becomes stuck at the bottom of the containment box. While trying to replace the seal the nut slipped down the line to the bottom of the containment box. When trying to recover said nut with the pick tool it too fell to the bottom of the containment box. Due to the design of the containment box the only way to recover the pick is to remove the containment box (several other attempts were made with no luck). Before anyone asks no the pick cannot be left in the containment box. When attempting to remove the containment box one of the bolts for the shutter panel stripped. I then found the stud removing tool and have successfully removed the bolt. Isaac is now going to finish removing the containment box and that will be as far as we can get today. 

September 22nd 

- containment box removed
- dropped tool and seals removed from box
- containment box reinstalled
- window water lines done up
- target installed (with difficulties detailed below)

The threads for the middle tube heater connection (circuit D) appear to be damaged and the bolt in that location cannot be fully screwed in.  The bolt was removed and showed damage to the threads.

September 23rd

A leak check of the window line was completed (https://elog.triumf.ca/TIS/RH-ISAC/459) and several electrical checks of the coil with and without the target in place. The values for the electrical checks continued to fail the open circuit criteria, an elog on the testing will be reported tomorrow. Isaac and Maico removed the target so that the helicoil could be repaired. The helicoil was repaired by chasing the threads with a modified tap but it was noted during the repair that the bolt holding the line in place and come loose and was no longer clamping the tube heater and ceramic tight. The target was also checked electrically to confirm that the coil was not shorted to common. It showed a open circuit resistance with a ohmmeter.

It was then attempted to re-install the target but as the target was being lifted a cable for the tong motion schematic broke (A-11682). 

Currently the target is sitting in the hot cell with the manipulator still broken. We are attempting to find parts and instructions as to how to replace the cable.

Hello all,

Access was required this morning to the TCS TK2 Expansion Tank to open a valve and re-fill the tank.

As the access path to this tank lacked any form of Fall Protection, Fall Arrest was employed.

Worksafe BC Part 11 Section 11.2 requires fall protection to be employed at elevations greater than 3 meters.  The expansion tank is located at an elevation far exceeding this regulation.
http://www2.worksafebc.com/publications/ohsregulation/part11.asp

The worker, Allon Messenberg, was fitted with a harness, personal self-retracting lifeline / lanyard with shock-pack, and carried two steel rope ring-ended slings with him to tie off to the structural beams overhead.  All products used were DBI-Sala safety products, which are kept in the Remote Handling machine shop Fall Protection Equipment lockers.  Several RH group members have keys to this locker, including me.

Three configurations were required to gain access to the tank (photo attached):
Configuration 1: Traversing the section between the 2nd floor offices and the ventilation duct.
Configuration 2: Traversing the section between the ventilation duct and the "cross point" of the structural beams.
Configuration 3: Tied-off to the "cross point" of the structural beams and working within the reach limits of the personal SRL and shock-pack.

Transitions between the three configurations required brief moments of un-clipping from the harnesses.  This will be solved in the future via the use of additional carabiners and lanyards.

Operations has advised me that they have observed either TRIUMF workers or contractors working in this area without wearing Fall Arrest equipment.  My request is for staff and operations to stay vigilant in observing access to this area. 

Any work performed in this area without the usage of fall arrest must be reported in an NCR.

I welcome any comments from those who have ideas for improving the safe method of access to this tank.

The cooling package is described in the TCS operating manual, Document-103881.  Page 8 states clearly that Fall Arrest is required to access this valve.

Regards,

Grant

During TM3 roughing down yesterday afternoon,The vacuum gauges CG1 and CG1S stopped at 1.20 torr and refused to drop down. Leak detector was used to found where the problem was. LD was in rough detecting mode and showed 2.7xE-6 atm.cc/sec as base leak rate.  Spray medium amount of helium to TM3 service top, and found this leak was on round panel of TM3 side wall. LR climbed to E-4 atm.cc/sec range on helium spraying. In my vie,One 10# socket head screw was not tightened properly after cameras job and caused this.  The TCS was vented. The panel was took off and reinstalled. O-ring on the panel  was replaced by a new one as well. Then TCS was pumped down again. The leak disappeared .  All turbo pumps on TCS and TM3 were started successfully later.

17-Oct-2022 Comment by David Wang: On OCt 14th, Replaced a flexible hose on MP1S pump exhaust port,but did not solve the issue. High frequency vibration was sensed by hand on MP1S pump inlet and outlet ports. Pump height and position in pit are adjusted slightly in pit to reduce vibration. After, ITHCG2 and ITW CG4SA got a huge improvement in past 3 days. All back up line pressure are stabilized at normal operation status. Still, close watching on this issue is needed to ensure the present status is stabilized in long term.

The issue was returned after shielding block installation Monday morning at 8:30am. Investigated further,  I temporarily installed a turbopump used cooling fan on MP1s to improve pump heat dissipation. And a room fan is put outside on shielding blocks opening hole to increase air circulation into pit. Since then,  everything is perfect. All secondary turbo pumps current draw is around 0.5 to 0.6A which is the best.  I guess that short duo 10 pump life we observed in past could be related to high pump operation temperature in pit as well. We may increase the pump life if air circulation around the pump could be improved. A permanent solution is needed for it.

A silo and blue steel frame are removed out of TH this morning. They are transferred  through ante room, and moved to experimental hall TM assembly area for a long term storage. Swipes are done on the silo and frame before and during move. No contamination has been found .

A new SST gas line with swagelock tube fittings and VCR fit is using for ITW febiad gas staion in pit. Gas line is leak checked on bench. No leak . it is installed on TM4 in ITW now,

With the aid of nic new manipulator snap fingers made by Maico the peek cable ties restraining the 9 pin connector wiring to the gas lines have been cut.

1 Jumpers between 60KV common and FEBIAD lines were connected in an unusual way.  This should of had no impact on the ZrC run but would have to be corrected for any future FEBIAD runs.

2 Feedthrough U was mislabeled (label has been removed)

I did a 5KV mega test on TM3.  Only5Mohm @5kV between coli line PQ and chassis(ground). It confirmed the close gap between P,Q and GE. Other lines are ok. See attachment.

David Wang wrote:

I did a 5KV mega test on TM3.  Only5Mohm @5kV between coli line PQ and chassis(ground). It confirmed the close gap between P,Q and GE. Other lines are ok. See attachment.

See attachment for sparking signs of the water lines mentioned  above (Coil and Ground Electrode lines) in TM3 Source Tray.

Aurelia Laxdal wrote:

David Wang wrote: I did a 5KV mega test on TM3.  Only5Mohm @5kV between coli line PQ and chassis(ground). It confirmed the close gap between P,Q and GE. Other lines are ok. See attachment. See attachment for sparking signs of the water lines mentioned  above (Coil and Ground Electrode lines) in TM3 Source Tray.

PLEASE NOTE: the resistance values for A and B on David's attachment are not correct since these measurements were done after Chad removed the target and the heat-shield bracket was moved, so consequently the water lines were not at their nominal locations. Once they were back in plac,e David took another measurement and the resistance values for A and B showed also 3,000 MOhm (as it was for most of the lines). The only lines that still showed a low resistance were the Coil lines. 

Travis and I removed the 55 pin connector from the service cap today. The feed through was left in place as a new design for the replacement has yet to be designed. It was not possible to test if the cables could be pulled easily as I believe there is still 1 cable tie in the containment box. The wires were cut flush with the top of the copper tube in case Chad cannot remove them via the hot cell. Other items removed include several cable ties and a clamp used to hold a cable tie. The side panels on the service cap we difficult to remove so copper never sieze was added when they were re-installed.  I have attached some pictures from before and after a complete record can be found in the TM3 docushare folder.

The ITW is configured to take proton beam.

I moved 5 shielding blocks to ITW this morning .I checked the water signals in electrical room before the moving, and everything is fine. The argon venting systemin ITW and electrical room is ready also.

5 SHIELDING BLOCKS HAD BEEN MOVED OUT OF ITE.AIR SAMPLE AND SWIPED FIRST BLOCK AND ITE PIT.NOTHING HAD BEEN FOUND ON ALPHA MONITOR AND OTHER TWO MONITORS.