The T1 and T2 cooling packages were drained to the BL1A holding tank on Jan 8 2016.  The volumes were 100L and 80L respectively.  Before starting there was 350L of water in the holding tank from the 500MeV system which Steve Sapriken drained in September 2015.  The T1 and T2 systems were sampled and delivered to RPG.  After receiving permission from RPG to release all 3 portions of water it was pumped into the city sewer on Jan 18, 2016.

The following tasks have been performed at T1:

- T1 monolith painted using grey two part epoxy paint
- Video inspection taken while package running. Small leak from both valves on H.E. secondary side (video on Isaac's PC, too large to upload)
- Cooling package sampled and drained, drain valve closed
- All reservoir o-rings changed
- All Hansen fitting o-rings changed (4x #6 size, 2x #4 size)
- All three cuno filters and filter housing o-rings changed (used filters 2mSv/hr on contact, temporarily stored on blocks by T1 package)
- Failed T1 P1 (inlet) pressure transducer replaced
- Supply and return valves for T1 CuALCW closed in tunnel to allow leaking valves to be replaced

- New resin can installed at T1 (this note added oct 15 2015 - was previously undocumented)
 

The following tasks have been performed at T2:

- Video inspection taken while package running. Documented leaks mentioned in E-Log #133 (video on Isaac's PC, too large to upload)
- Cooling package sampled and drained, drain valve closed

RPG has analyzed the water samples and given approval for water from both packages to be released.

 An end-to-end test was performed on the new T1 and T2 high temperature safety switches yesterday during the maintenance day.  The switch set points were lowered below the current temperature and it was confirmed that all warning messages and XTPAGE status changes occurred as expected.

 The following work was performed on the T1 cooling package:

- New filter housing installed for Col. A filter.  The new housing has a drain valve to prevent water spills during future filter changes.
- Ball valve installed upstream of Col. A filter to allow proper isolation of filter during filter changes.

The following work was performed on the T2 cooling package:

- After further investigation it was confirmed that the air-line noise discovered last week was being caused by a fault check valve.  A new valve will be ordered and installed.
- The M20BB air supply Asco valve was rebuilt to fix an air leak.
- The backing plate, paddle-wheel, shaft, and o-ring for Q2 Proteus meter were replaced.  (fixed fluctuating read-out)
- Replaced 90 micron Nupro filter on the demin. line to address low flow issue (flow increased from 1.15gpm to 2.50gpm)
- Replaced Inlet Pressure Transducer (P1) in BL1A tunnel  (fixed fluctuating read-out)

 

The following work was performed at the T2 monolith:

- Signals were checked to confirm proper micro-switch actuation for M9 and M20 beam blockers (all ok)
* When M20BB is actuated a slight creaking or squeaking noise is heard during one part of the travel.  The main shaft and air cylinder shafts were lubricated, but there was no change.   (this is not thought to be a serious issue, and won't be addressed at this time)
- Replaced o-rings on the upper 1-way metering valve for the profile monitor air supply (fixed air leak)
- Replaced all sections of pneumatic hose for top and bottom supply lines to the profile monitor (old line was cracking)
- Checked actuation of profile monitor by powering 4-way Asco valve at cooling package (traveled smoothly)
* Control room was unable actuate the profile monitor remotely, Brian Minato will be notified of this issue
* The "monitor out" display does not show in the control room when the profile monitor is in the out position.  The micro switches were checked and seem fine.

 Mike Mouat and Juan Pon have modified the control system so that the control room will receive a message when the warning or trip level sensors for the T1 & T2 expansion tanks read "NOT OK".  The message also displays the current water height in the tank.  This will help with earlier detection of water leaks from the cooling package or from the target ladder in the vacuum volume when the vacuum interlock has been defeated.

All sensors were checked by depressing the level sensor float and the correct warnings came up on the message reader.

Mike Mouat enabled recording for T1 and T2 expansion tank warning and trip level sensors on XTPAGE/XSTRIP.

XSTRIP output is in discreet integers as follows:
2 = Both sensors OK
1 = Warning level NOT OK
0 = Trip level NOT OK

Mike is now working on having a warning message show up in the control room when the sensors read NOT OK.

- 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)

Water was drained from the T1 and T2 cooling packages, samples taken, and delivered to RPG.

All filters on the T1 and T2 cooling packages were changed except for the T1 demin. line filter which is hard to access and could not be properly drained.  This filter will be changed next shutdown when the area is more accessible while the resin cans are being changed.

The field from each filter was measured after removal:

T1 Target Water Filter:  180μSv/hr @ 0.5m, 8.26mSv/hr on contact
T1 Collimator A Filter:   0.86μSv/hr @ 0.5m, 0.61μSv/hr on contact  (same as background)
T2 Target Water Filter:   185μSv/hr @ 0.5m, 10.5mSv/hr on contact
T2 Demineralizer Water Filter:   2.10μSv/hr @ 0.5m, 30.0μSv/hr on contact

9000cpm were measured on Isaac's coveralls after completing this work, most likely from laying on the concrete blocks next to the cooling packages to access the filters.  Keith's coveralls had 300cpm.  Both pairs were bagged and taken to active laundry.  The filter cartridges on Isaac's respirator had 700cpm.  RPG was notified and Danka will do a gamma spec on the respirator filters.

The T1 and T2 cooling package water will be released after approval from RPG.

Manufacturing of a new batch of T1 and T2 beryllium targets has been completed.

The job was completed under Machine Shop Work Order #41527.  Eleven 12mm T1 targets (TBP1683) and seven 10cm T2 targets (TBP1691) were completed (exhausting all stock of the leftover EDM'd target housings).  The target window profiles (TBP1695) were laser cut at an outside shop for greater precision and to save time.  The target window assemblies were electron beam welded to the target housings (TBP1687 & TBP1692) by Bob Welbourn.  The remainder of the tube welds were completed by George Sun.  Assembly of the Swagelok fittings, target inspections, hydrostatic testing, and final helium leak checks as specified on the assembly drawings were performed by Isaac Earle.  In addition to these tests, one spare target housing was pressure tested to 275psi (the max pressure of the regulator of target jig TBP1721).  The target windows bulged at this pressure, but did not rupture.

The attached spreadsheet has details on target measurements and test results.  The target serial numbers (listed in the spreadsheet) have been engraved on the 90 degree elbow of each target on both the entrance and exit side.  Detailed photographs were taken of each target which are stored on Isaac Earle's hard drive (too large to attach).

If the 2015 target replacement plan is followed (See E-Log #168), these targets should last for at least 10 years.

Drained T2 cooling package water, collected sample and delivered to RPG.  Swapped resin can, refilled, and restarted cooling package.

After 6 hours can inlet at 10.3MΩ *cm, can outlet at 10.5MΩ*cm electrical resistivity.

The suck tube vessel was drained, rinsed, and transported to the active sink area in the Meson Hall Hot Cell Lab.  There are no longer high fields from the suck tube and it is ready for future use.  The filter, tubing, and flange used for filtering the active water were removed and bagged and are currently stored in the south-east corner of the warm cell.  This bag measured up to 12mSv/hr on contact.  There are small black particles visible inside the bag.  The filtered water was sampled and will be released if approved by RPG.  The bucket with the active water is stored in the active sink boot-box area.

Photos attached.

 The recently removed resin can from the T2 target station was rinsed with city water and flushed with compressed air for 1 cycle. 

We will run it through a few more cycles before proceeding with drying under the fume extractor, at which point this ELOG will be updated. 

UPDATE (Feb 08, 2024): The T2 resin can underwent 3 more air cycles. Today it was moved under the fume extractor with the lid cracked open and will be left to dry till next shutdown. It is worth noting that some clumps of old resin was found in the secondary resin can which was previously under the fume extractor. This resin should be disposed of alongside the T2 can's resin once dried.

 The water in the South TNF Holding Tank was released today under work permit #C2018-08-28-3.  The tank contained approximately 100L from the T1 cooling package (drained Aug 16, 2018) and 350L from the 500MeV system (drained April 23, 2018 by Steve Sapriken).

 The following tasks were performed during the 2012 September Shutdown:

- Both targets moved to position 0 in preparation for testing of profile monitors (portable ladder control box was used for controlling ladder motors)
- T2 monitor OK; T1 monitor would not hit 'IN' limit
- The T2 branch of the amplified air system was closed, now the T1 monitor hits the 'IN' limit properly  (conclusion: a known leak in T2 section of amplified air is causing a drop in pressure of the system which prevents the T1 profile monitor from actuating properly)

- Both cooling packages were inspected and photographed (nothing abnormal observed)
- Both cooling packages drained, and water samples delivered to RPG
- Expansion tank level sensors tested at both packages: All OK
- All Hansen quick connect o-rings replaced at T1 package
- 90 micron filter on demin line replaced at T1 (caused ~0.2gpm increase of Q2 flow)
- Both packages refilled and restarted (operating normally)
- Q2 flow on both packages adjusted to ~1.45gpm

- The cause of the amplified air leak was discovered to be a cracked air dryer located in the BL1A service tunnel (photo attached)
- The air dryer was replaced which stopped the leak, resulting in a significant decrease in air amplifier cycle period and an increase in air amplifier output pressure from ~110 to 120psi

- Movement of the T1 ladder caused a spike in beam line vacuum;  After further testing it was concluded that the T1 target was leaking water
- T1-MK2 target was transferred from the beam line to the hot cell; T1-MK1 target was transferred from the storage pit to the beam line
- T1-MK1 profile and protect monitor electronics checked by Bill Rawnsley: Both OK
- Initially a leak was suspected at T1, but it was later discovered that the volume was just pumping down slowly due to water in the beam line from the T1-MK2 leak
- T1 profile monitor was not actuating properly;  It was found to be caused by a short to ground on one of the profile monitor limit switch wires.  The faulty wire was replaced by Probes Group
- T1 and T2 profile monitors tested.  Both actuating properly.
- New target ladder information sheet delivered to ops

- The leak in T1-MK2 was found to be coming from the center of the beam spot on the entry side of the position 3 target (photo attached, but not great quality).  This is a 12mm Be target, and has been running in beam position since initial start-up this spring.

 The second (and final) 55 gallon drum containing active items from the Meson Hall East Hot Cell was transported today from the Warm Cell to the Cyclotron East Vault Tunnel.   The updated form is attached.

A safety walkaround for July 2024 was completed by A. Kong.

Results can be found in the master spreadsheet

Major deficiencies:

• Identified a 1/2 ton chain hoist missing an inspection tag. Mechanical Services will need to be informed about this.

A safety walkaround was completed for the Meson Hall Hot/Warm Cells.

The resulting spreadsheet can be found on DocuShare as Document-242733.

Main deficiencies identified:

• Hot Cells:
  • Pressure gauge reading is suspect
  • Operator station phone not working (resolved now)
• General:
  • Lifting equipment has overdue inspection

Action has been taken on all deficiencies.

Replaced T1-MK1 target ladder with the new ladder design which has an integrated upper slide plate (2 less sealing locations) and no c-seal grooves.  C-seals replaced with aliuminum delta seals.Transfered all target cassettes to new ladder in the same positions.  Performed helium leak check at interface with bellows flanges and all cassette locations.  No leaks detected.

Target still requires installation of new protect monitor.  Beam-spot and elevations procedure must still be performed.

 Replaced M20 beam blocker vacuum seal o-rings.  Old o-rings were noticeably harder, but not brittle or cracked.  Applied "Haskel Dry Air Seal" lubricant to air cylinder shafts and "Apiezon M Grease" to vacuum seal o-rings and main shaft.  Took approximately 1 full days work.  Total dose: 0.08mSv.

I have refilled the water package on T1 with DI water. The Expansion Tank is at 37cm. This may change when pump is turned on.