The following five pails were moved to the mini-storage vault today under work permit I2022-12-16-1:

• #239 (formerly vault location 7A): 1.38 mSv/h @ 1m
• #245 (formerly vault location 6B): 1.56 mSv/h @ 1m
• #264 (formerly vault location 6A): 748 uSv/h @ 1 m
• #267 (formerly vault location 1C): 708 uSv/h @ 1 m
• #268 (vault location 7C): 809 uSv/h @ 1 m

The mini-storage vault is now full and ready for transfer to F-308 flasks.

The following measurements were made on other pails:

• #211 (vault location 3C): 4.21 mSv @ 1 m
• #217 (vault location 3A): 1.05 mSv/h @ 1 m
• #246 (vault location 6C): 1.98 mSv/h @ 1m
• #274 (vault location 1A): 4.78 mSv/h @ 1 m
• #228 (vault location 1B): 3.86 mSv/h @ 1 m
• #256 (vault location formerly 7A, now 7B): 3.60 mSv/h @ 1 m
• #260 (vault location 5B): 1.46 mSv/h @ 1 m

The target index spreadsheet has been updated to reflect these changes. See attached PDF print.

[edit 2023-01-03] The crane was powered back on this morning - there do not appear to be any faults and it seems that the crane was unaffected by the power outage.

The ISAC target hall overhead crane was powered off for the holidays. Note that this may result in the commonly observed PLC battery failure issue when the crane is powered back on in the new year.

The following three pails were moved from the main storage vault to the mini-storage vault:

1. #211, Ta#58 (formerly vault location 3C)
2. #217, ZrC#8 (formerly vault location 3A)
3. #228, UC#37 (formerly vault location 1B)

The target index spreadsheet has been updated.

ITW and TM2 primary and secondary vacuum vessel leak check is done. Leak detector is connected to ITW TP1. Base leak rate on leak detector is 0.0 x E-9 atm.cc/sec.   See attachment for the result.  No big issue. Two old leaks we found last year at location D and E disappeared in this check. We did Vacseal resin spray on them last year.  It looks like the Vacseal spray works .  From the result , I can see the o-ring between exit 1 module and T - flange is closing to the end of the life.  There are two small leaks on this o-ring now at A and B location. We plan to change this o-ring next winter shut down. We do vacseal spray on them this year. The big O-ring between tank vessel and T -flange looks still ok. Two small leaks are found on location F and G on this O-ring. Not much we can do on them. The leak on location C and B were sprayed with resin yesterday after leak check. They are leak free after spray on check. I will double check them. Leak on location A will be resin sprayed after TM2 is removed and ITW is under vacuum.   All TM2 internal water-cooling lines are helium pressurized (70 psi) for 5 minutes each. HS shows 2.5 X E-9atm.cc/sec leak rate. The rest lines are 0.0 X E-9 atm.cc/sec.

 ITW  was cleaned with vacuum canister in Jan 10th. HV  cage inside and blue nylon insulators were wiped.  Garbage inside the pits were cleaned out.

Plant group and us  finished TH floor mopping and garbage collections last Wednesday. Th moping head had 800 count after using. all garbage were bagged , checked, tagged, and sent to radwaste area.

Tom Kauss inspected target hall crane yesterday. The crane works fine. Tom has this inspection record in his file. The inspection tag has been issued.

Tom Kauss  finished TH crane annual inspection yesterday. The crane woks fine. Tom has this inspection record in his file. The crane inspection tag has been issued for 2023.

Tom Gauss inspected  two target module lifting frames ITA0494-1997-01 and ITA0494-1997-02 yesterday. He certified the use of these two frames for 2023. Inspection tags have been issued and attached to frames. He has inspection record on them. 

Tom Kauss inspected target hall crane below hook attachment pins and plates ITA6550-01 yesterday. He certified the use of these pins and plates. The inspection of these pins and plates was in Target hall crane annual check list. It was issued as a calibration index by Isaac Earle in 2022-Feb-08.  After inspection, The inspection tag  was issued and attached to pin. Tom has an inspection record on this job

In past two weeks, ITW/ ITE primary vacuum back up lines and BVs in ITW/ITE pit have been leak checked.  ITW BV1 and BV2 on back up line side were leak. They are replaced with old leak free BVs.  ITE TP2 NW25 SST  flexible line right after pump were leak . It is replaced with new NW25 SST flexible line. Two leak were found on ITW side KF 50 O-rings connected to NW 50 SST flexible coupling. They were replaced with new KF50 o-rings. After job, both  stations primary back up lines in pit were leak checked .  They are good.

Five of used  internal leaked  TP BVs are serviced and repaired. Internal plunge  o-ring and case o-ring are replaced on all five BVs. Leak checked valves after  . They are ok to be used as spare parts.  The are active parts stored in TH now.

Feb. 16 2023: HV tests done on ITE station. Ramped up to 59kV but was not stable there, current draw was very unstable and was sparking every ~6mins. Ramped down to 58kV and it was stable there for 3 hours drawing 285uA.

Feb. 24 2023: HV tests done on ITW station. Ramped easily to 60kV with no sparking - suspicious. Has been stable at 60kV for 45mins with no sparks and current draw of 200uA. Cannot find any reason that things aren't connected properly...

Two filters on HALCW resin circuit have been replaced. O-ring 235# were changed on both filter cartridge houses.  25micron  10"x 2.5" 3M cartridge new filters  are used. Old filters are not very dirty. They are bagged and stored in vacuum pit. Residual water from cartridge houses are collected and stored in high active storage jug with sealed cap.  No leak on resin circuit before and after the job.

I visually inspected HALCW system including water station section, both target pits, and de-ionizer system.  No small leak and drip was found .  The inspection in both target pits will be repeated after flow sensors are replaced.

vacuum pit ventilation upgrade was done last week. The jobs include: installed two industrial cooling  fans.  One is placed in pit on resin tan cover. Other one is placed on and opening to pit by shielding blocks.  They are installed for better air circulation in pit. Also,  2x two small 20W cooling fans are installed on ITH MP1 and MP1S to low the pump  operation temperature.  The result is positive. The ventilation status in pit meets the pump operation requirement (good ventilation and 40 Celsuis below) .  ITH CG2S 0.0 mtorr.  ITH CG2 0.26mtorr.

The linear actuator used for the Y-motion motor assistance on the spare telemanipulator was replaced and tested. It was observed around September 2021 that the former one which was installed was causing fuses to blow for the main 120 VAC power supply in the control box. After some troubleshooting, it was determined that the linear actuator itself did not operate smoothly - it was suspected that this caused motor overload due to additional friction. This suspicion was confirmed by operating the linear actuator independently with a power supply and measuring current draw. The part has been replaced by Thomson PPA90-58B65-08NXXX. Note: this part took over 1 year to arrive since it was first ordered. The spare telemanipulator is confirmed operational.

Update 2024-09-11: noting that this was for serial number 9351

Adam Newsome wrote:

The linear actuator used for the Y-motion motor assistance on the spare telemanipulator was replaced and tested. It was observed around September 2021 that the former one which was installed was causing fuses to blow for the main 120 VAC power supply in the control box. After some troubleshooting, it was determined that the linear actuator itself did not operate smoothly - it was suspected that this caused motor overload due to additional friction. This suspicion was confirmed by operating the linear actuator independently with a power supply and measuring current draw. The part has been replaced by Thomson PPA90-58B65-08NXXX. Note: this part took over 1 year to arrive since it was first ordered. The spare telemanipulator is confirmed operational.

 During this repair it was noted that the Y-axis electrical translation is locked out when the Z-axis is in the fully retracted position (i.e. the Z-axis limit switch engaged). I have made a note of this in the operator manual (CRLD-1046-B Rev1 ) which can be found in docushare collection 26780

HALCW flow sensors replacement job is done. All ITE/ITW(except ITE HS) return line water flow sensors including paddle wheels and coils are replaced.  After job, water interlock signal have been checked in electrical room .  Everything works fine. Visually inspections for possible water leak on HCLCW system have been done as well. one valve on ITE dump return line has a very small water seeping through valve stem. I will watch on it.  Other than that,  No major concern.

2023-03-08: leak on 1/2" ITE dump return line valve is fixed.

HALCW ITC:MP1/MP2 motor phase current measurement is done by Joel from electrician group. MP1:17.1A/17.2A/16.7A.  MP2: 17.9A/17.9A/17.3A.   19.5A is manufacturer notified on full load phase current.on operating  instruction manual.