It was recently noticed during safety walkaround checks that there is an air gap all along the top of the hot cell, which varies in size, which was previously covered with duct tape. In some sections, the duct tape was completely degraded or missing entirely. 

A foam tube was purchased (see specs below) and the duct tape was removed and replaced by the tube. See attached photo. Work permit: C2025-07-04-1. The entire perimeter of the hot cell was not covered - some air gaps remain, and some duct tape (still intact) remains. There seemed to be a marginal improvement in hot cell depression level (improvement of around 0.01 in H2O) after the foam was inserted. 

The following are recommendations:

1. Continue monitoring the condition of the duct tape on the side that still has it (hot cell personnel entry side). Replace with foam if needed.
2. Continue monitoring depression level during regular safety walkarounds.
3. In the future, consider inserting a custom-cut foam piece around the manipulator feedthrough areas, and any other area with large air gaps. Important note: this hot cell does not have a dedicated air inlet tube with filter - if all gaps are fully covered, there will be no airflow path into the cell. If major improvements are made to reduce air gaps, it is recommended to install a custom foam insert with an appropriate filter to act as an air inlet. 

Foam tube details:

McMaster-Carr part number 2029N19
Multipurpose Blended Neoprene Foam Tube
1-5/16" OD, 7/8" ID, 10 Feet Long

 June 3, 2025 - Albert Kong, Aaron Tam 

RPG finished analysis of the water sample and given approval for the contents of the holding tank to be released to city sewer

Procedure following Document-64834 Release No. 3 performed 

• Starting volume sighted at 98cm mark ~
• Approximately 100 minutes (9:05am-10:45am) pumping @ 1.70-1.80 USG/min 
• Pumping till dry (pump noise noticeably changed when dry) (Dry pumping time max 30 seconds)

BL1A Active Water Holding Tank ready again to receive water from T1/T2/TNF.

 Indium extruder Double acting cylinder repairs and service complete. Adjustments were made to relief valve setting on pump model P84 as PSI was too low in combination with old cylinder seals and pump was dumping to reservoir. Advance and retract stroke both acceptable, tested with mock indium gasket and extruder working as designed.

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:
  • Operator station phone not working (help ticket created)
  • Nuclear ventilation pressure delta - measured lower than last time

The uncovered VA8 section of beam pipe was surveyed in preparation for a visual inspection and some laser scanning.

Fields around the East and West elevated ledges of the beam pipe were around 100 uSv/hr. The pole monitor registered around 2mSv/hr on contact with the beam pipe indium joints.

------------------------

April 09:

We took recordings of the VA8 section using the remote pole camera () and took photos as well (attached).

The T1 cooling package was refilled to ~38cm and restarted. Shortly after restarting reservoir level dropped and settled to 37.8cm.

No visible leaks when viewed from the Meson Hall south walkway,level seems steady after ~1 hour of operation, water conductivity also returned to normal after a few minutes of flow.

All water PV green at EOD.

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UPDATE Feb 11:

At approximately 6.00pm yesterday, the water level in the expansion tank dropped to 36.4 cm, where it remained level overnight.

 All cooling system PVs stayed green overnight.

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UPDATE Feb 12:

Water level in the expansion tank remained level at 36.3 cm. Cooling package PVs all green.

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UPDATE Mar 27:

The T1-MK2 demin water flowrate was tuned to 1.1-1.2 gpm when in position 1 (12mm Be target). The profile monitor was actuated again in position 0 and confirmed to be working properly.

During this test, we found an odd 'stuck' state that the T1 system controls can enter where the control room operators became unable to turn off the cooling system. It turns out they don't have the ability to turn off single devices, like the pump, and can only turn off the whole system.

We likely arrived at this state by raising the ladder further, even though we were already at position 0 (manual jog button was used by the operator). As a result, flow was blocked and the water temperature ahead of the pump kept rising. This is actually quite a critical failure mode, in the future to prevent this problem, we should instruct control room operators to turn off the cooling system before driving the target ladder.

We solves this issue by asking Tony Tateyama to turn off the pump for us, likely his EPICS user account has the ability to turn off individual devices. With the cooling system turned off, we were able to complete the tests and tune the demin water flowrate.

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UPDATE Apr 3:

After the T2-MK2 target ladder was moved to the target station, the T2 cooling package was filled to 38.2cm and the cooling package was restarted after connecting services to the ladder. The water level in the expansion tank dropped to 32.8cm after restarting.

The level in the T1 cooling package dropped further to 34.9cm, which we assume is caused by trapped air that escaped the cooling system volume.

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UPDATE Apr 11:

T2 cooling package refilled to 38.3 cm, T1 cooling package refilled to 39.7cm.

The compressed air ASCO valves for the M9BB, M20BB, T1 Profile Monitor (2x 8342C1 [rebuild kit 306-191] + 1x 8320G216 [rebuild kit 314-949] respectively), and T2 Profile Monitor (8320G216) were serviced with their rebuild kits.

To service these valves, we isolated them from the compressed air source by shutting off the outlet valves on the air amplifiers and venting the compressed air through the shared inlet lines (see photo).

When reinstalling the T2 profile monitor valve, there was some difficulty turning one of the Swagelok nuts. It would be a good idea to prepare spare tube fittings to replace any that no longer seal properly.

We can re-energize the air amplifier and check for leaks in the valve in the coming days (tube of soap solution brought to red toolbox on blocks)

The actuation of the T1 profile monitor and T2 beam blockers (M9 & M20) can be checked shortly after the air amplifiers are re-energized.

When the T2 target is returned to the station, we can check the actuation of the T2 profile monitor.

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UPDATE Feb 19:

The air amplifiers were re-started, supply valves to the T1 and T2 valves were re-opened, and the T1 profile monitor solenoid valve was tested by actuating the profile monitor.

The T1 profile monitor moved 'in' and 'out' successfully without timing out, but the control room operator noted that there was some odd status on EPICS for the T1 'harp' and that it did not correspond to the limit switch status for the profile monitors.

At T2, the M20 blocker solenoid valve does not hold pressure when supplied with air (toggle on cooling package panel turned on) and vented through the open port.

• Troubleshooting results:
  • M20 solenoid, when connected to the M9/T2 blocker solenoid electrical connector, 'opens' successfully and does not leak, causing the M20 blocker to go up.
  • M9 solenoid does not 'vent' when disconnected from the connector, successfully holds pressure in the 'rest' state.

We believe we made a mistake when re-assembling the M20 solenoid valve, this will have to be troubleshooted at a later date and possibly review the 'harp position' status on EPICS for the T1 profile monitor.

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UPDATE Feb 24:

The cause of the 'leaky' M20 valve was identified: it was installed in the reverse orientation, small arrows were drawn on the M9 and M20 valve bodies to denote the direction of airflow to prevent future installation issues.

The air amplifier was venting through the muffler, which is not the way that it normally operated prior to being turned off. We will look at this issue at the end of shutdown when testing the beam blocker actuation.

DRAWINGS UPLOADED IN PDF, DOWNLOAD TO VIEW ALL DRAWINGS, PREVI

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Jan 27:

T1-MK1 was moved to the storage pit in position #4. M9BB was moved to the hot cell for shutdown maintenance (o-ring replacement, air cylinder servicing, etc.).

When M9BB work is done, it will be returned to the target station and replaced with T2-MK1 for servicing (target exchange, measurement target installation, etc.).

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Jan 29:

Maintenance operations on the M9BB were completed on the hot cell.

• The air cylinders actuated and lowered smoothly, and at 42 psi as indicated in the instructions document.
• The felt wiper on the shaft seal was replaced.
• 3 o-rings were replaced on the bronze shaft seal bracket and lubricated with vacuum grease
• upper limit switch actuation was confirmed after reassembly
• BB returned to the adapter plate on the turntable and reoriented for pickup

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Feb 03:

M9BB returned to target station:

• o-ring groove on monolith cleaned,
• replacement o-ring with vacuum grease placed
• during return, we noticed pieces of 'scrap metal' on the bottom of the beamblocker, it was removed and when scanned registered a count that exceeded the radiation cave monitor's dial, this will be stored/disposed as active waste.
• M9 ASU still disconnected, could not 'push-down' M9BB with gas line connected, gas line left disconnected for now.
• T handle plate removed, limit switch rod returned

T2-MK1 moved from target station to hot cell roof, north hook used for flask, south hook used to adjust the position of the alignment frame:

• section of hot cell roof railing had to be removed for the flask to clear when handled by the north hook, there is also a similar functioning cutout on the wall by the storage pits
• peak fields are 1100 uSv/hr at the hot cell opening by the target.

T2-MK1 servicing started on hot cell roof:

• T2-MK1 water flush completed, ~1 min air purge cycles completed for all target positions, left at position 5 (plugged) for longer term air purging (~3 hours).
• A broken ceramic cap was found on the top of the target vacuum flange.
• 4 quarter circle segments from what looks like the old-style graphite targets were found on the base of the target ladder.
• The coupling between the potentiometer gearbox and the ladder drive screw has a rubber section, we will have to inspect it and decide whether to replace it with a metal coupling during this shutdown, if so, we should also replace the plastic ferrules and update the bulkhead plate to be more servicable.

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Feb 05:

T2 station was surveyed, peak fields were found by the blanked off T2 opening: 4mSv/hr. Immediately at the cover fields were around 16 mSv/hr.

No fallen pieces of suspected graphite target segments were found on the monolith, it may be a good idea to check inside the monolith hole with a remote viewing camera to make sure nothing is obstructing the locating feature on the base of the target ladder (to be included in the T2 return work permit).

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Feb 10:

The T2-MK1 target ladder underwent a water rinse and several days of air purging. 

5 psi compressed air was run through each target position (including position 5 which is plugged) for several hours each. Then, the ladder was fully dried using the leak detector and  cold trap on Feb 07.

The leak detector was calibrated with Vacuum Group's external source to 8.7e-8 mbar-L/s prior to operation. The leak detector and vacuum line up to the target service panel connections were checked to be leak tight prior to testing (0 leak rate and <1e-3 Torr pressure).

A single pump-down cycle was sufficient to get vacuum to establish within reasonable time:

• Total pump-down duration was ~55 minutes
• 60 seconds to go into 'fine vacuum' mode.
• 2 min 13 seconds to get to ~1e-3 Torr vacuum in ladder
• leak rate was initially ~1e-8 Torr-L/s and slowly dropped to 0.0e-10 Torr-L/s over the course of the pumpdown (48 minutes to bottom out)
• the ladder was left at the bottomed out leak rate for around 5 minutes prior to venting. 
• approximately a 1cm thick, 10cm diameger puck of ice formed on the side of the LN2 vessel of the cold trap.

Upon closer inspection with Isaac Earle, the following were observed for graphite pieces on the T2-MK1 target ladder base:

• The surface finish on the chips strongly suggest that they are graphite target materials
• Curiously the graphite chips are all of different thicknesses, to our understanding, the graphite material used in the old targets are of consistent thickness.
• The rounded faces of the chips had no clear sign/evidence of brazing when compared to sample pieces that can be found in the Hot Cell Lab office.
• No clear signs of beam spots can be found on the flat faces of the chips, near the corner edge.
• No clear signs of brazing on the targets were observed.

The above observations suggest that the chips did not originate from an operational target that has seen beam.

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Mar 21:

The T2-MK1 target ladder was leak tested with 3psi x 0.5s doses of He.

The baseline initial leak rate of the ladder was ~1e-8 Torr-L/s but reached around 1e-10 Torr-L/s when allowed to pump down over ~1 hour. Fine test was reached after 30s of pumping down (with cold trap), ladder pressure was stable at ~1e-3 Torr throughout.

See attached image for detected leak rates, overall all joints performed well, with the highest leak rate of 4.2e-9 Torr-L/s registered by one of the joints on ladder position 1.

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April 02:

The T2-MK2 target ladder was moved to the target station from storage pit #3.

During the return procedure, from visual inspection of the target tube, there doesn't seem to be any dropped material in base of the tube.

We encountered some difficulty seating the o-ring on the monolith flange's groove because the o-ring was stored in a coil. Extra vacuum grease was used to keep the o-ring stuck flush in the groove.

When lowering the ladder onto the monolith flange, the chain hoist bottomed out just short and we had to lower the flask with the crane for the target ladder to make contact. Edi from vacuum group helped us pump down on the vacuum volume and at first glance it seems to be pumping down ok.

We will return in the coming days to re-do the service connections to the target ladder and do a final check of the system.

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April 03:

The plug in pos#5 and the 5cm target (SER# 301) in pos#3 on the T2-MK1 target ladder were removed in the hot cell and bagged and moved to the East hot cell. 

The loose graphite material on the base of T2-MK1 was also bagged and labelled and moved to the East cell. 

The measurement target bracket TRH1766 was installed in position 5 and a 5cm target cassette (SER # 308) was installed in position 3.

The target bracket was cleaned in an ultrasonic cleaner with simple green, then tap water before being dried. The tube screws were switched with DIY vented screws.

The pos 3 and 5 male Swagelok threads and conical sealing face were 'cleaned' with the conical scotch-brite tools (cone and cup) with the air ratchet and blown out with a compressed air can.

The Swagelok nuts on the new target cassette and bracket was first tightened till the Swagelok gap inspection gauge could not fit in the gap.

The ladder was then leak checked and initially only pumped down to 3e-3 Torr with 2.5e-8 T-L/s leak rate. After some tightening of the Swagelok nuts on pos 3 and pos 5, the pressure and baseline leak rate eventually bottomed out to 1e-3 Torr and 0.0e-10 T-L/s respectively.

With 3psi x 0.5s He, the highest leak rates were found in position 2b, 3b, and 5a, all being less than 3e-9 Torr-L/s.

Of note, there is a 'ding' on the 'right' side bellows (as viewed from hot cell widow with target ladder rotated closer toward the window), the highest leak rate was found when we sprayed He directly at this 'ding'.

 ---------------------------------------------

April 03 (Continued):

We moved the T2 flask alignment frame off from the T2 station, re-connected all target services to T2-MK2 and re-connected the compressed air line to the T2/M9 blocker.

The T2-MK2 profile monitor drives in/out properly without timing out.

The target ladder drives up and down smoothly between pos 0-3.

We tuned the demin flowrate to 1.1-1.2 gpm for the T2 target in position 3 (5cm Be), and for the T1 target in position 1 (12mm Be, actually done end of Mar).

After some time allowing the pump to flow, all process variables in the cooling package reached operational ('green') levels.

As normal though, the T2 target flowrate was relatively low and close to the lower warn limit of 3gpm. We should look into upgrading the pump on this cooling package or adjust the warn/trip limits according to some Engineering analysis.

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April 09:

• We attempted to open the needle valve on the T1 heat exchange further but it was already fully open. Flow through the heat exchange is still fluctuating around 6.3 GPM, occasionally dipping below 6 GPM. It may be possible that the heat exchange paddle wheel needs to be changed for the flow rate to increase again.

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April 11:

• After re-inspecing the supply and return lines for the T1 heat exchanger in the BL1A tunnels, no metering/flow adjusting valve was found (also true for the T2 line). The flow through the T1 heat exchange will have to hover around the 6gpm mark (flow changed likely because other upstream systems are receiving flow).
• The flow through the T2 target (12mm Be) hovers around 3GPM, for both position 3 and 5 so we will have to deal with it hovering around the warn limit for the coming operational period (pending thermal analysis to justify changes to the warn limit)
• The M9/T2 and M20 blocker movement was tested and confirmed.
• The profile monitor movement for both the T1 and T2 target ladders were confirmed.
• We also tested a method of powering off the cooling pump by disconnecting the PLC signal/control cable to the 480V power box on the mezzanine.After disconnecting the signal cable, the T2 pump successfully turns off and upon reconnecting, the control room successfully regains control over the pump.

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Jun 25:

• T2-MK1 target elevations was measured from Jun 20-24. 
• The target flange was levelled to within 0.2 degrees during the measurements.
• Generally, the target centres line up with past measurements from 2020. 
• The new completed form can be found here.
• The measurement jig centres was also measured (see hand written note). 
• During measuring there was a brief instance where the profile monitor made contact with the target in position 1, we were able to verify that the profile monitor centre did not change (measurement immediately before and after stayed the same). 
• We will re-verify that the electrical system of the profile monitor and that the vacuum of the target ladder is not compromised.

All rubber components on the T1 T2 water solenoid valves were exchanged on Jan 22, 2025.

To service the heat exchange water and all collimator solenoid valves, the low active copper supply line in the 1A tunnel had to be shut off (see pictures). Note that the shut off for the T2 secondary water did not work perfectly, it is possible that there either the valve was not shut off properly or there is another shutoff valve in the 1A tunnel that needed to be turned (see picture of 'T' on T2 supply). When exchanging the rubber seal and o-rings on the T2 parker heat exchanger solenoid, approximately 1-2L of active water flowed out from the valve opening onto the blocks. When returning into the 1A tunnel at the end of the valve servicing job, no dripping water or pools of water was found.

The solenoid bodies and connectors were not exchanged, but we will check that they are working properly after re-filling the systems near the end of shutdown.

All CUNO filters at T1 was exchanged on Jan 17.

At the time, access to the CUNO filters at T2 was obstructed by a shielding block, we will exchange these filters once the block is moved.

All Hansen fittings on the target station were inspected, all o-rings found to be in good condition.

No leaks identified in system.

The noisy T2FGSEC proteus paddle wheel flow sensor electronics was replaced.

While exchanging the sensor board, we decided to compared the wear on the paddle wheels of this sensor and another sensor (Q1, << sees less flow rate than T2FGSEC).

We found that both paddle wheels had similar levels of wear and decided to exchange both while we had the sensors taken apart.

UPDATE JAN 24:

The two CUNO filters on the T2 cooling package was serviced, all 5 spent filters transfered to MH RH HC lab for temporary storage, kept in boot box area by the hot cell tool port (attached photo only shows 4, 5th spent filter underneath rest).

It was noticed that the -235 O-ring beside T2 pump was no longer circular, new maintenance item added to checklist for all CUNO O-rings to be replaced, will be done in coming shutdown.

The T1 and T2 cooling packages were drained starting at 14:36, by 14:48 both expansion tanks had dried, meaning the draining rate for both tanks were ~80L/hr, generally it will only take 2 hours to fully drain the system.

Tritium samples were collected after allowing the system to drain for ~5 minutes to clear out water in the drain lines and actually collect samples from the reservoirs. The samples were passed onto RPG for analysis.

The drain valves on the cooling packages and in the BL1A tunnel is left open.

Update Jan 23: the drain valves in the 1A tunnel and the valves on the cooling packages were closed.

The following maintenance tasks were completed on 2024-11-29 by A. Newsome, A. Kong, A. Tam, M. Dalla Valle:

• Warm cell right window water level topup... the water level was a couple inches lower from the top. Using a tube connected to the nearby sink, the level was topped up fully. See attached before/after picture.
• Hot cell oil level checks:
  • Right side OK. See attached picture.
  • Left side very low compared to July 2022 measurement (suspect internal leak?). The oil was topped up. See attached before/after picture.
• Hot cell scissor table pump oil level check - M. Dalla Valle notes this was topped up approximately July 2022. The table was operated and functioned normally, did not sound concerning. The oil level was visible and acceptable.

Still to do, next maintenance check-up:

• Check HC atmospheric pressure differential gauge
• Lubricate HC turntable (planned for 2025 winter shutdown when target assembly not present)
• Lubricate all telemanipulators

T1-MK1 electrical checks were completed on the hot cell. Specifically the profile and protect monitors were checked (assistance from Micheal Donohoe and Holden Jones from 'probes group'/accelerator systems).

Reference WP C2024-10-30-3.

"WORK INSTRUCTIONS / REFERENCE DOCUMENTS: Perform blip test of target protect module by attaching HV oscillator to protect HV bias. Check that the oscillator signal is readable from U,D, L, R and HALO signal cables.

For profile monitor, connect PM cable assembly to 0518 MWC module in portable NIM crate. Connect 0518 "START" to ch2 of an oscilloscope and "ANALOG" to ch1. Set scope to trigger on Ch2. Connect HV oscillator to profile HV bias. Observe signals on all channel devisions, note any channels not responding."

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Test outcome (paraphrased from text discussion with Micheal Donohoe)

Profile monitor functioning properly from test, but right 'plate' on protect monitor yielded different results to other plates. May need to be re-checked, pending comparisons with results from previous tests (issues with this because "different oscillator was used"). We may have also not used couplings for cables that were correct for that particular protect monitor plate.

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In images attached, red cable used for profile monitor (connect to the vertical connector at the rear), the dark green wire is used to ground the system when the profile monitor is being checked. The grey cable bundle (with 'box') is used to check the protect monitor, with vertical pins located by the main lifting flange support bars in the front left of the target (see bottom right of first image).

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Micheal and Holden returned on the 31st with Thomas Manson, they performed direct testing on the leads of the protect monitor connector (directly hook up leads on protect monitor connector to oscilloscope/multi-meter). All direct checks went well, the waveform issue from yesterday's testing likely resulted from the testing cable having issues.

Electrical testing on T1-MK1 is now complete. Probes group will work to update their documentation and possibly develop a process change to fabricate new cables to make the testing happen fully on the hot cell roof and have it complete faster.

Note: it may be a good idea to perform preventative maintenance on the protect monitor @ T1-MK1 the next time it is on the hot cell. Probes group members noted that the protect monitor components are nearing their end-of-life and it would be good to replace old components to avoid the protect monitor failing in the target station.

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.

The active sump high level sensor was tested and correctly alarmed locally. However the alarm in the MHESA RCR lab did not make any sound and no notification was recieved at the main control room. After some investigation, it is believed that the RCR lab alarm 'had already produced a notification at the control room and so no new notification was produced by testing the remote handling sump. Alternatively, the RCR sump alarm may have been silenced in the control room and so the notification was not seen. 

We will look to modify the system so that our sump's alarm does not piggy-back off the RCR sump alarm when notifying the control room.

Secondary flow sensor B1A:T2CS:FGSEC:RDFLOW on the T2 cooling station suddenly became very noisy at around 11 pm, 01 September 2024.

The sensor reading would fluctuate from 0-150 gpm which is beyond typical noise levels for these sensors (~2gpm).

The noise spontaneously ended at around 4 am, 05 September 2024.

The noise likely originated from some stuck debris preventing the paddle wheel from turning normally that got spontaneously dislodged.

Alternatively, changes in the environment temperature could have broken some electrical contact that recovered when the temperature cooled over the weekend. We will make a note to look into this sensor in the coming shutdown and perform preventative replacement of components.

(UPDATE: see ELOG 359, FGSEC serviced)

During a replacement of the RCR1 active sump (mechanical services group), approximately 600L of non-active grey water was released into the RH active sump. At this time, this should be all of the water in the RH sump (approximately 600L total).

The RH active sump was drained (over Jul 31-Aug 01), in total approximately 5500 L of water was sent to city sewage.

We also tried to divert water from the BL1A holding tank to the active sump, and learned that we cannot run back-flow through the sump pump. The valving configuration used here was V10, V1, SV1, V6 open - V2, V3 closed. (Note solenoid valve SV1 does not serve a purpose and energizing/powering-down does not affect the observed flow.)

In order to divert water from the holding tank to the sump, we likely need to add a 'T' after V6 to send the flow through the opening port into the sump.

The BL1A holding tank was subsequently drained and is now ready again to receive water from T1/T2/TNF.

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.

The primary transfer flask was inspected on the 26th of June, 2024:

1. Electrical cabling and connections externally mounted on the flask + on the hook/latch were inspected for wear, damage, proper connections,etc.
   • It was learned that the controls+power cable that drives the latch also runs the height indicator pulley+lead weight system, this should be reworked in the future and replaced with proper load bearing rope/cable.
   • The cable connecting to the main control box was duct-taped heavily, it may be a good idea to replace it with proper reinforcement in the future.
   • The power cable connection to the grey junction box is not terminated properly and should be re-terminated (some other cables may need to be re-terminated properly).
2. Various markings on the exterior of the flask were checked:
   • Marks on the flask flange were still visible
   • Marks on the flask body for reference flask orientation were still visible
   • The weight of the flask (30,000 lbs) had faded and was written over with a sharpie (it may still be a good idea to paint a larger version of the weight so that it is visible by the crane operator)
3. Limit switches throughout the flask was inspected
   • The chain hoist limit switches were tested and both functioned properly, some wear was observed on the spring toggle for the upper limit switch but it does not need to be replaced yet.
   • The limit switches on the hook/latch were tested and functioned properly, with the exception of the 'unlatch' limit switch which we could not test because the unlatch indicator light on the control was broken (this should be re-tested in the future).
4. Rolling/rotating components (pulleys for the door and level indicator, guide wheels inside the flask,  door pin/hinge, main lifting eye, hook latch) were inspected
   • A retaining ring was missing from one of the level indicator pulleys which was promptly replaced
   • All other pins/shafts/rollers were in visually in good condition and rolled properly (despite some being rusty) and had proper retaining components (cotter pins, retaining rings, etc.).
   • Note that for future inspections, it may be a good idea to manually move the various rollers to check by hand if the pins/shafts need to be lubricated
   • Also, the lead weight driving the level indicator should be painted over, and a sacrificial contact pad should be used to prevent the load from wearing the outside of the flask
5. Electrical assemblies inside the control and grey junction boxes were inspected and found to be in good condition
   • *Except for a broken LED for the unlatch limit switch in the main control box (the broken LED issue was sourced to a broken relay that was promptly replaced, the unlatch status light shows up now)
   • All hook/latch actuating switches on the control box seemed to be working (note that the finger-related switches were not tested)
   • Note that there is an 'override' button on the control box whose purpose is unclear, we should investigate this to determine its purpose in the future
   • Note that to access the internals of the control box, only the two central screws along the white line need to be removed
6. The chain hoist and cable pulley system for flask door were inspected
   • The chain lubrication seemed dry, it would be a good idea to re-lubricate the chain properly and perform some form of maintenance on the hoist in the future
   • The chain length is retracted and dropped from a bucket and currently causes the chain to rub against a corner on top of the flask, in the future it may be a good idea to make some changes to avoid this
   • The flask door cables used duct tape to prevent the crimped cable loops from fraying and was still in good condition
   • In the future, we may want to look into the cables' channel to check for fraying or damage along their length.
7. Inspect main flask structure
   • Welds on and around the main lifting eye were in good condition without chipping paint
   • There was visible deformation on the lifting eye from contact with the hook, but this should be no cause for concern, and besides this, no signs of wear/damage was found on the lifting structure
   • The external welds on the main flask body were in good condition
   • The welds on the hook/latch that we could see were in good condition and still fully painted
   • There was some rusting on the platform
   • The welds on the ladder and platform were of lesser quality than the lifting structure but no cracks or broken welds were found
   • In the future, we should determine a weight limit for the platform based on some analysis
8. The aluminum tray was inspected and found to be in good condition, however we should replace the old rubber pieces with new ones at some point
9. The drive mechanism for the doors/hook/latch was tested and we were able to travel the full distance without abnormal sounds from the chain hoist.
10. Seismic clamps were inspected and the bolts + threaded inserts were re-tapped and greased for smoother disassembly/installation.

In addition to the items above, the four 'fingers'/actuators that are holstered by the base of the flask was inspected visually, we will confirm their function before determining whether they need regular inspection/maintenance.

Also, at some point we should inspect the target alignment frames, their camera systems, as well as hot cell flask controls systems.