On January 15th, when attempting to move the T2 target from the beam line to the hot cell, the latch mechanism on the flask did not actuate and the target could not be lifted from the beam line.  

On January 16th the flask was placed on blocks (IMG_0818) (while remaining attached to the crane) in the RH hot cell lab for inspection.  The cause of the problem was found to be a damaged and disconnected military style connector (IMG_0824).  Damaged wiring was also found (IMG_0836).

On January 21st the connector and faulty wiring was replaced by Travis Cave, which fixed the problem (IMG_0838).  The new location of the connector is less exposed and should prevent it from getting damaged if the target swings within the flask.  Travis and Don Jackson also used the opportunity to check some wires on the flask that previously were not documented properly.  The flask was returned to its storage position in the lab and is ready for use.

 Five 5 gallon metal pails with active waste were moved from the Warm Cell to the Cyclotron East Vault Tunnel today for long term storage.  The pails were labeled with radioactive item tags and storage item numbers (1442 through 1446).  The pails contain used resin from T1, T2, and STF, as well as one pail with active metal parts.

All filters were replaced for the T2 cooling system: demineralizing resin circuit and target water system.

All filters were replaced for the T1 cooling system: demineralizing resin circuit, target water system, and M15.

A filter housing and filter were installed by Dan McDonald on November 14 in the piping section between the Remote Handling Hot Cell Lab active sump and the city sewer drain as shown in the attached picture.  The purpose of the new filter is to prevent pieces of active material from being released to the drain when the sump is pumped out.  If small pieces of active material enter the sump they may sink to the bottom, and not be captured in a water sample which is taken from the top of the sump.

The filter housing is a Waterite HP1034CLUR-KIT, and the installed filter is a 10" Cuno Microwynd 25micron filter.

This modification was approved by Curtis Ballard, Joe Mildenberg, and Grant Minor prior to installation.

The CUNO filters were changed 2023-01-17 for:

• BL1A Holding Tank drain output, adjacent to the pump
• RH Active Sump, adjacent to the V2 valve

Both of these filters are in-line with the drainage lines from the BL1A holding tank to the active sump. It was suspected that they have not been changed in many years, if ever. Prior to changing the filters, the maximum flow rate measured from the Proteus paddle wheel sensor during draining was around 0.85 gpm (the draining procedure document indicates it should be between 0.9 to 2.5 gpm). After replacing both filters, which each showed significant clogging of sediment, the flow rate significantly increased and the maximum of 2.5 gpm was achievable. Note that when the drain pump was initially turned on, it took some time to reach the desired flow rate due to air in the water lines - the flow rate was quite low until the lines were once again filled with water.

It is suggested that these filters should be replaced every ~3-5 years, depending on usage, or otherwise as-needed (it is possible to see through the clear walls and determine how dirty they are). This MRO item will be added to the checklist of routine T1/T2 related tasks performed to prevent flow rate issues in the future during draining.

Filters were bagged and discarded as active waste.

Attached photos show old filter in bucket, and newly replaced filter, for the RH Active Sump.

 The three failed T2 cooling system secondary side solenoid valves were tested yesterday to try to determine the problem.  The test steps are detailed below:

• New spare valve (NSV) produced audible "click" and valve was seen to physically open when 24V DC driving voltage was applied
• Failed valves of July 25, 2017 (J25), July 10, 2017 (J10), and November 2016 (N16) all did not click or open when driven
• The solenoid of NSV was removed from its valve and installed on each of the failed valves in turn.  The NSV solenoid succesfully opened each of J25, J10, and N16 (the valve bodies and pistons of the failed valves appear to be fine, and the solenoids all faulty)
• Each solenoid's coil resistance was measured: NSV = 187kOhm, J25 = 200kOhm, J10 = O/C, N16 = O/C

On the next maintenance day Tony Tateyama is planning on performing continuity tests on the T2CS:SVSEC control cable and comparing it to the control cable for identical solenoids in the system.

 An expansion tank high level warning has been added to the T1/T2 control system under Work Request #4011.  The purpose for this new warning is to alert staff of an unexpected water increase in the unlikely scenario that a leak develops in the heat exchanger between the two fluids and CuALCW on the secondary side enters the target water system.  The new thresholds for high level warn, low level warn, and low level trip have been set at 40cm, 30cm, and 25cm respectively.  The nominal water level is 35cm.  All thresholds were tested by adding water to the tank, or removing it.  All responded as expected.

This morning at 5:30am the T2 cooling package expansion tank switched to WARNING LEVEL NOT OK.  There was no change in BL1A vacuum at this time.  The change in level was confirmed by inspecting the water level visually.  Operators suggested it may have happened because the cyclotron was shut off and the temperature of all water systems dropped, however T1 did not experience a noticeable change in level, so I do not think this is the cause.  It is possible there is a leak on the cooling system somewhere, but the evidence does not suggest a leak into the vacuum volume.

At 11:55am the BL1A vacuum spiked tripping off both cooling packages.  Valve 1AV8 is closed.  There is no pumping on the T1 volume, so the pressure is slowly increasing.  T2 is at approximately 50mTorr.  Operators believe it may have been caused by work at M15 or M13.  

This appears to be unrelated to the water loss at T2, but proper diagnosis is not possible because Vacuum Group staff are away for the holidays.  The cooling packages will be left off until proper diagnosis can be performed in the new year.

 On September 9th in the morning Ron Kuramoto noticed that the T2 cooling package expansion tank level was reading NOT OK for the warning level.  Looking at XSTRIP showed that the warning level tripped at approximately 1:50am on September 8th.  The tank was refilled at 4pm on September 9th to the usual level (1/2" above the nut on the trip level float).  The expansion tank level will be checked tomorrow and periodically throughout the week to determine if there is a water leak, and if so what the leak rate is.  Note that there has been no significant change in BL1A vacuum, so a water leak into the vacuum volume is not suspected.

 Defeated T1 and T2 cooling package vacuum interlocks at 1-C panel on South mezzanine in Meson Hall to allow cooling packages to continue running after beamlines are vented.

Notified operations.

2018 Cyclotron lid up problem. Station #9 was  found to  have the motor wires along the beam plain had damaged wire insulation. There were bare wires in the conduit resulting in the wires shorting out. The wires were repaired with a quick short replacement. Lid went up for in tank work. After lid down the problem was investigated. We checked the radiation levels   at all  of the stations to come up with a plan to determine witch of the stations had the highest levels. We found that stations 1,3,5,7,9, and 11 had the highest levels. Station 1 was inspected and all wires were replaced to the T elbow. Station 3 all wires were replace to the T elbow. Station 5 all wires were replaced  to the T elbow. Station 7 all wires were inspected and were in good condition and put back into place. Station 9 all wires including syncro were replaced all the way to the junction box. Station 11 motor wires were good, but the jog wires and the syncro were replaced to the pull box. All of the jog switches on stations 1,3,5,7,9,and 11 were falling apart when wires were inspected.  New switches were ordered and assembled. At the start of 2019 shutdown all jog switches were replaced on stations 1,3,5,7,9, and 11. After all the jack work was finished the jog switches were check and were working well.

Pumping was restored to 1A today by Vacuum Group and the beam line returned to normal vacuum levels.  Both cooling packages were started with no change in vacuum (no water leaks inside the vacuum volume).  The T2 package was left on for approximately 1 minute, and then the expansion tank level was checked.  Approximately 1cm of water was lost.  The T2 package was turned off, and will remain off until the package can be inspected later this week after block removal.  The T1 package will be left running until T1 MRO work begins.

 The T1 and T2 expansion tanks were filled on Monday April 8th.  There was no change in the level when inspected today (April 12th).  Visual inspection of the packages also found no leaks.

Replaced all o-rings and filters on the T1 cooling package.  Replaced resin can.  Refilled package and restarted. 
Can inlet resistivity at 9.8MΩ *cm, outlet at 11.5MΩ*cm after approximately 3.5 hours.

(Collimator A filter and modified filter housing to be installed at a later date)

With the assistance of Maico we changed the paddle wheel, o ring, and shaft in the Collimator A flow meter (Q4) at the T2 package.

Flow meter was wiped clean to ensure o ring surface was clean.

Everything was changed without incident, and ops confirmed that the flow rate is now normal.

The paddle wheels, o-rings, and shafts were changed at the T2 cooling package for the following sensors:

• B1A:T2:FGCOLA
• T2CS:FGTGT
• T2CS:FGDEM
• T2CS:FGSEC
• T2:FGCOLB

No major issues were noted. Some residue was observed upon cleaning the sensors. No leaks observed when turning water isolation valves back on.

Two of the sensors, FGCOLA and FGTGT, experienced anomalies during the previous beam run which resulted in faults (#14656 and #14501, respectively). The system is not yet running in order to confirm whether the replacement has resolved the faults.

The schematic which contains these sensors is TBP0902.

The paddle wheels, o-rings, and shafts were changed at the T1 cooling package for the following sensors:

• B1A:T1:FGCOLA
• T1CS:FGTGT
• T1CS:FGDEM
• T1CS:FGSEC
• T1:FGCOLB

No major issues were noted. Some residue was observed upon cleaning the sensors. No leaks observed when turning water isolation valves back on.

The schematic which contains these sensors is TBP0902.

 The 10-pin thermal switch wire, 2-pin steering wire for Q2, and a 1/4" copper tube for remote helium leak check were installed through the service chase with the power cables and connected to the M9 service stand.  Approximately 10m of extra cable (2-pin and 10-pin) was coiled and left in the cooler section of the service chase after the first sharp bend.  The cables and the tubing are currently run as far as the vertical cable tray "waterfall" located near the M11 area.

 While wrapping up vacuum seal bearing replacement on the M20 beam blocker I found a piece of hard black material approximately 3x1x1cm on top of the hot cell turntable.   Checked for contamination and found 480,000cpm on the Ludlum 44-2 probe, and off scale on the pancake monitor.  This piece fell from the transport flask when it was opened above the hot cell after picking up the M20 beam blocker.  Upon further inspection, more pieces were found inside the hot cell on the table.  RPG was notified and currently has the sample for further testing.