The following instructions were provided by Graham Waters:

From diag5pc bootup

Password: cfzx29mkdr

Bring up a terminal (click on "terminal icon" left side of screen)
> su
> xpfk34yzjc
> chmod o+rw /dev/ttyS0
> chmod o+rw /dev/ttys1

Bring up terminal emulator GTKTerm
   From booton left of screen
  Click on Applications->Accessories->GTKTerm 

 The T2 protect monitor cassette removed in April 2015 (see E-log #154) was surveyed today.  It was approximately 3mSv/hr at 0.5m and 15mSv/hr on contact.  It is unlikely that this monitor will ever be cool enough for hands-on elevation adjustment that it requires, therefore it has been bagged, labeled, and transferred to the east hot cell for storage.  

Today the T1MK2 target was moved from Position 4 to Position 0 to lower the Rad fields for the 1AM7 repair in the 1A Tunnel. The Rad levels were still to high only dropping by 1000uSv/Hr to 5000uSv/Hr, so the 1AM7 repair is planned for next Tuesday's maintenance day on Oct 6th.  1A will be off till then giving a longer cool down. 

The target was then moved moved back to Position 4 with the Pot ratio reading 0.699. The target was moved using the portable Control box.  The "power on light" on the Control box needs to be replaced.

Note: The MS connector on the 1AT2 cable needs to be tighten before using.  It became loose when swapping the portable Control box cable to the 1AT1 cable.

The cooling package turned on ok after the vacuum was established.

Don Jackson assisted me with this operation and was appriciated....

 The stepper motor that drives the target ladder on T2-MK2 has failed.  This is the cause of the difficulty moving the target ladder yesterday afternoon (see previous e-log).  This was confirmed this morning by attempting to move the T1-MK1 target ladder in the storage pit using the portable control box - the ladder moved with no issues.

The motor is scheduled for replacement during the 2016 winter shutdown unless it is needed more urgently.  Operations have been informed that T2 ladder movement will not be possible until this motor is replaced.

The T1 and T2 targets were moved to position zero, then back to the target position today so that beam profile could be checked using the profile monitors.  Movement for both targets was done with the portable control box.

The T1 target was moved from Position 4 to Position 0, then back to Position 4 (after checking the profile) with no issues.

While moving the T2 target from Position 4 to Position 0 the ladder stopped moving part way through travel.  By toggling the control box "RUN / OFF" switch the motion could be restarted.  This had to be done 2 or 3 times to reach Position 0.  When returning to Position 4 after checking the profile the problem became more severe.  It took over 20 minutes to move from Position 0 to 4 because the ladder only moved slightly or not at all each time the switch was toggled.  This is either due to a failed motor on the target, or failure of the portable control box.

The next step will be to try moving the ladder of one of the target assemblies in the storage pit to determine which is at fault.  In the mean time neither the T1 nor T2 target ladder should be moved.

The warm cell water window tanks were filled on September 17 after 2 weeks of curing time.  A water leak was found coming from the seals of a plastic pipe joining the two tanks near the top.  This was repaired using rubber gaskets and quick cure caulking.  The tank was refilled on September 18 and no longer leaked from that location.  The sand filter was backflushed with the water exhausted to the grass area outside the hot cell lab until the water ran clear.  The pump was then started with the water circulating normally through the filter.  Small water leaks were observed coming from 3 of the 4 plastic ball valves on the filter loop piping.  These leaks stopped after approximately 3 days of continuous running, and are still leak tight now.

During this repair job it was observed that the support wheels for the warm cell manipulators are crumbling and should be replaced before the next time the manipulators are used.

 The RH hot cell lab active sump high level sensor was tested as part of the yearly scheduled inspection.  High water level was simulated by tilting the sensor sideways with a long pole sample scoop.  The Main Control Room and Hua Yang from Nuclear Medicine were notified before the test.  The alarm sounded as expected, and a message was received in the main control room.  This is a latching signal, so a Control Room operator will go to the MHESA RCR lab to reset the alarm.  The water level was approximately 12" below the high level sensor, so the sump may need to be sampled and emptied soon.

Since the previous E-Log the following tasks have been completed:

- Panel spacer rods installed at 4 locations in each tank (two top, two bottom at approximately 1/3 and 2/3 the way across)
- Spacer rods expanded only slightly to begin compressing the rubber window spacers while still leaving at least a 8mm gap between window and frame
- Window and frame around seal area masked off with masking tape
- Sealant was applied from the outside using a plastic cone tip with a copper tube attachment to allow sealant injection to the bottom of the sealant cavity.  The process involved having one person inside the tank to make sure the sealant cavity was completely filled with no voids. A total of 42 of the 20oz. sausages were required.  Two spare unopened sausages remain.

The sealant will now be left for 2 weeks to cure before water is added to the tank.

The following tasks were completed over the past 2 weeks:

- Aquarium Technology Ltd. (UK) was contacted regarding best method for replacing window seal.  A detailed procedure was provided (attached below)
- The warm cell windows were determined to be acrylic, not glass.  Estimated weight: 450lb per panel

- All water in the warm cell windows was released to grassy area outside the lab after approval from Gord Wood (OH&S) and Joe Mildenberger (RPG)
- Warm cell was cleaned up and blocks were configured to make fields as low as possible in the work area around the windows (~2micro Sv/hr max field around windows).  No contamination found on warm cell floor.
- The old seal around each window was cut mechanically with a thin blade
- The panel spacer rods were removed  (most were constructed of SS and Al, however a couple were mild steel and were badly corroded)
- The window panels were separated from the frame using a rubber mallet and moved to the center of the tank (the panels were not removed from the tanks for this repair)
- The old seal material was removed from the panels and the aluminum frame using WD40 or mineral spirits to help break it down (this was a very tedious and unpleasant task)
- Pitting due to corrosion was found in various places on the aluminum frame.  It appeared to be worst where mild steel spacer rods were used, and also worse at weld locations (see attached photo).  Max depth of pits ~1/8"
- The corrosion was cleaned as much as possible using a wire brush then rags with mineral spirits
- A final clean of sealing surfaces was done with isopropyl alcohol
- A deep pit (~1/4" deep) was found on the inside of the inside of the aluminum frame on the west tank, south window (see attached photo)
- This pit, as well as some other smaller ones on the same side were filled with Dow Corning 791 sealant material

- Rubber stand-offs (Digi-Key #SJ5009-0-ND) were installed on the frame side in the center of the sealing faces (3 top, 3 bottom)
- The panels were moved back into place resting on 3/8" thick aluminum spacers (see attached photo).  These replaced spacers of the same size and material that were slightly corroded

The following tasks remain to be completed:

- Install panel spacer rods (mild steel rods to be replaced with SS or Al)
- Apply sealant to all panels from outside the tank as detailed in the procedure using 20oz pneumatic applicator caulk gun (PO: TR206556)
- Install corrosion inhibiting pads inside tank.  Will use 6 pads per tank, (4x McMaster 3609K2 & 2x McMaster 3590K2 per tank)
- Perform final clean of inside of windows and tank
- After 14 days cure time fill tanks with city water and allow to sit to check for leaks
- If leak tight, use water in tanks to back-flush the sand filter
- Refill tanks and start pump with filter in normal mode
- Occasionally check for water leaks and check status of pitting inside tank over the coming months/years
- Also monitor corrosion inhibiting pads and replace or change materials if necessary

Summarized Seal Replacement Procedure provided by Aquarium Technology Ltd:

1) Cut out the viewing panel entirely and mechanically clean all sealant traces from both the panel and the frame bearing faces of the tank structure

2) Degrease all sealing surfaces with something like pure petroleum spirit (mineral spirit) which won't harm the acrylic

3) Reinstall the clean viewing panel spacing it off the frame bearing face by around 10mm using self adhesive rubber stand-offs  (depending on panel flatness likely no more than 3 needed along the top and bottom)

4) Brace the panel in place, mask off the frame and panel, and then inject Dow Corning 791 sealant from the outside.  Ensure that the sealant goes in under pressure, fully wets both surfaces, and completely fills the void.

5) Allow the sealant to cure for 10-14 days before filling the tanks

The 4" Marman flange clamp (IRH0001) labeled "Clamp A",  as used in the testing detailed in Document-114623 Release 1, has been disassembled.  The parts were used to build a TRH1257 clamp which uses the new TRH1259 jaw with 0.480" jaw root width.  This new clamp has been labeled "TRH1257-#01", and will be tested with Helicoflex H-303654 seals in the near future.

T1 and T2 beryllium target failure history was investigated back to 2000 (as far as XSTRIP records were readily available).  For each target cassette the following were noted: length of time the target was subject to direct beam, length of time the target was on the ladder w/o direct beam, and method of failure.  The purpose of the study was to devise a target replacement strategy so that T1 and T2 beryllium targets are preemptively retired from service to reduce the occurrence of failure while running which causes loss of beam time, extra dose to personnel, and damage to equipment.

The following recommendations are the result of the study:
- T1 beryllium targets should be retired after 9.0 months of running time
- T2 beryllium targets should be retired after 12.0 months of running time
- Multiple targets should be installed on each target ladder (at least 2, possibly 3) so that targets may be switched during a running period if required and less target assembly moves are required

A PDF copy of the Excel spreadsheet is attached which includes target use history, failure history, summary of results, and more specific recommendations for each target assembly.  This study and the replacement plan recommendations were reviewed and endorsed by Grant Minor and Yuri Bylinski.  This spreadsheet should be reviewed and updated every shutdown period (including Fall mini-shutdowns), as well as anytime there is a target failure.

- All T1 and T2 values on XTPAGE were stripped back to April 1, 2015:  All systems appear to be functioning normally, nothing unusual observed

- Expansion tank levels checked visually:  T1 level at 1/2" above top sensor nut, T2 level at 1/4" below top sensor nut --> filled to 1/2" above

- Lower air amplifier in use; cool to touch; approximately 25s between each cycle (when air is exhausted from device)

An order for new T1 and T2  beryllium targets was submitted to the TRIUMF machine shop today.  A total of seven T2 targets and twleve T1 targets were ordered to match existing stock of wire EDM target shells.  All required materials were supplied.  Completion by October 30, 2015 was requested.
 

A complete set of new drawings for both targets were released in June 2015 (TBP1683 for 12mm T1 Be target; TBP1691 for 10cm T2 Be target)

Current target stock for T1 (12mm Be) includes: 1 target on the shelf, 1 target on the MK1 target assembly (position 4, has not seen beam), 1 target on the MK2 target assembly (position 4, currently in use).

Current target stock for T2 (10cm Be) includes: 1 target on the shelf, 2 targets on the MK1 target assembly (position 3, has seen beam;  position 2 has not seen beam), 1 target on the MK2 target assembly (position 4, currently in use).

 A 5lb roll of 347SS sheet was received today.  This alloy is to be used for the target windows of the new T1 and T2 beryllium target cassettes that will be manufactured in the near future.  The material was ordered from Alloys International (PO# TR206407).  A mill spec report was included with the material, a scanned copy is attached in PDF format.  The roll will be stored in the meson hall RH hot cell lab office on the shelving above the work bench.

 The water in the BL1A holding tank was released to the city sewer.  This water was sampled, tested, and approved for release by RPG two weeks ago.  The total volume was 510L, a combination of water from the T2 and TNF systems.  The total time required to pump out the water with all valves fully open was 1hr2m.  Paperwork for the water release was completed and returned to RPG.

The new T1/T2 level sensors (Omega LVCN414) were hooked up to the PLC and the test performed on June 11 was repeated.

The water level above the base of the bucket was measured using a tape measure, as well as with the level sensor at various intervals as the bucket was filled and then drained:

Tape Measure Level (cm) --- Reading from Ultrasonic Level Sensor (cm)

Empty --- 0
3.3 --- 3.3
6.7 --- 6.7
12.2 --- 12.2
20.5 --- 20.3
29.2 --- 28.5
36.6 --- 36.3  (Last measurement on June 17, left overnight, see graph below)
36.6 --- 35.6 (First measurement on June 18)
31.3 --- 30.2
22.0 --- 21.9
13.1 --- 12.3
7.3 --- 6.5
Empty --- 0

Data was recorded while the sensor was left overnight (see attached plot).  After approximately 2 hours, the sensor stabilized and then fluctuated less than 0.1cm for the next 12 hours.  Overall these tests proved that this sensor will be suitable for the intended application and the parameters used for configuration are appropriate.

The new T1/T2 level sensors (Omega LVCN414) were tested in the RH HC lab today using the Omega software on a laptop and positioning the level sensor flange above a bucket of water with similar height as the expansion tank.
The level sensors behaved as expected with varying water level.

The level sensor was configured with the following parameters:

- Loop Fail-Safe: Empty
- Output at Empty: 4mA at Bottom
- Start-up condition: Empty
- Sensor Height: 50.1cm (Based on TBP1682)
- Fill Height: 45.0cm (Based on TBP1682)

This results in 4mA output at 0cm tank height, and 20mA output at 45.0cm tank height.

This test will be repeated next week with the sensor wired directly to the PLC.

At 9:15am this morning BL1A tripped off due to loss of the watchdog signals for the T1/T2 control system.  Graham Waters investigated and the problem was found to be a corrupted initialization file.  The error was corrected, and BL1A was started by 11:30am.
 

Grant moved the T1 and T2 targets from position 0 to position 4 this evening at around 9pm.

The position 4 selector button on the T1 rack was not working.  The manual control box had to be used with the adapter cable and military connectors for both T1 and T2 to achieve position 4 on both targets.

Replacement of the BL1A blocks was completed yesterday (May 8, 2015) in preparation for first beam down 1A on May 12th.  The attached PDF shows a photograph of the current arrangement, and also the block arrangement at the beginning of the 2014 running period for comparison.