Logbooks Lab Maintenance Evaporator_1 Evaporator_2 Laser cutter Target Production Test-Stand RH-ISAC RH-Cyclotron RH-Meson Hall RH-Beamlines RH-ARIEL
  RH-ISAC, Page 140 of 140  Not logged in ELOG logo
ID Date Author Category Type Module Target/Numberdown Subject
  2785   Tuesday, March 18, 2025, 13:54 David WangITEStandard Operation  ITE water signals interlock annual check

ITE water signals interlock annual check is done today. all interlocks work . No issue.

  2786   Thursday, March 20, 2025, 13:10 David WangConditioning StationStandard Operation  TCS water system filters annual replacement has been done.

TCS water system filters annual replacement has been done. Plant group Dan Tower finished the job and updated the inspection tags .

  2787   Tuesday, April 01, 2025, 09:47 Frank SongNorth Hot-CellRepair  Two NHC light bulbs replacement

2 broken lights of NHC were replaced in Target Hall. see pics attached.

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  2788   Friday, April 04, 2025, 09:35 David WangCraneDevelopment  spent target pail and its lifting jigs load test

Adam and I did  spent target pail and its lifting jigs load test this morning.  The load for full pail test is 263 lbs and for empty pail is 69 lbs. pail and all jigs passed the test.

  2789   Friday, April 11, 2025, 13:34 chad fisherNorth Hot-CellRepair  remote end 9342 installed

On March 27 remote end 9342 was installed on the west position (right hand as viewed by operator) and arm 9**4 removed and moved to anteroom.

Previous to this installation, arm 9342 received tensioning of the elevation twist pulley block and tightening of the tong cable opening via the tong cable drum. Tong opening was reduced to roughly 2" to achieve tension in the tong cable such that slack upon release of the system was reduced and tong cable didn't hop pulley in elevation/twist pulley block (this 2"opening is not enough to grasp the air ratchet but is suff. for holding a target...right manip will have to hold the air tool for now. It is also notable when dealing with the tong cable system that slack can cause the tong cable to hop off the secondary pulley in the wrist joint (where two cables run through a secondary pulley that has no retention feature).

Notable during this repair was the fact the the lock-down set screws on the elevation/twist pulley block were missing. These lock down the tensioning screws once the block has been tensioned. New set screws were installed after elevation twist cables were tensioned to their nominal value of 15 in lbs.

It is my recommendation that, when the spare remote arm is fixed and there is a window that this arm come back out and the tong cable be replaced (we have 6 on hand).

  2790   Friday, April 11, 2025, 13:46 chad fisherNorth Hot-CellRepair  Remote end 9**4 repair

Tong cable on remote arm 9**4 has be relocated onto its pulleys and tong opening adjusted at the tong cable drum by changing the position of the tong cable screws by two positions (tightened/closed) such that the air tool will fit in the tong and some of the slack in the tong system has been taking up.

An attempt was made to also adjust the elevation twist pulley block which would also aid in taking up slack in the tong system however, the elevation twist pulley block was already and the end of its adjustment. Elevation twist cables are measuring 10 in lbs, the nominal value that they should be at is 15.

Tong system has been cycled multiple times and the tong cable itself looks good. This arm should be good for service however, I recommend a new pulley block be ordered and the new one dimensional compared to the existing. If they are the same we may consider shortening the new pulley block to achieve a window for tensioning, after which I would recommend the pulley blocks be swapped...swapping should only take place after 9342 has had the tong cable replaced and we can be more confident in its operational state, or in the 2026 shutdown in allowed.

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