On March 27 remote end 9342 was installed on the west position (right hand as viewed by operator) and arm 9764 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).

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.

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

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

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

To prevent TP bearings seize during shut down, ITW:TP3,TP4, TP1S TP4S have been started since March 06th. They work fine.  The plan is to switch them off this Thursday, and restart them in May before ITW in use.

Service of  Parker 1/4 quick connectors in ITW and ITE have been done.  all 28 female connectors were serviced. o- rings and valve stem in quick connectors were replaced. the serviced connectors have been installed back to ITW and ITE.  Visually inspected all connectors with flowing through them. No leak, and they function well. 

Chole and I finished ITW water signals interlock. No issue.

HALCW resin can loop two filters have been replaced. no water leak on after job check.

After waste transfer, I did a SHC field measurement from TH through top flange opening. The general field around manipulator maintenance working area is 550 to 650 usv/hr(0.4 to 0.5 meters above table). some area on work table where target fragile material stayed before have 1.0 to 1.3 m/sv (closing to contact measurement). The spreading of target material dusts deposited on table, and affected the whole cell field in my view. 

 Another pail of active trash was move to the spent target vault from the south hot cell. 800uSv/hr, place in spot 7A see attached PDF for vault status.

 ITW/ITE water system manual valves water small leak inspection and repairing job is done. Small water drippings have been found on ITE: manual supply and return(valve stems).  ITW: 2A window supply(valve stem), collimator supply(valve stem),EE return(valve stem), HS supply and return(valve stems), tube heater supply and return(valve stems). all small leaks are repaired. 

HALCW pump ITC:MP1 and MP2 phase current draw measurement result: water supplied to both station. MP1: Black 17.0A, blue 16.9A, red 16.7A.   MP2: black 17.3A, blue17.8A, red 17.3A.    The results are good.  No concern on both motors.

After removing the previously found extraction electrode and other suspect components the field at the manipulator tongs (in front of the window) in still 3mSv\h.

I have been through every bin etc in the hc and even emptied the dust seperator canister of the vacuum. I will use the camera to look under the table and inside the vacuum cleaner itself...these are really the only possibilities left.

TM2 has been moved from TCS to west-south silo. Travis and I did the job. The move is successful.

TM4 electrical check at SMP(vented) without target: PQ is dead short to RU. PQRU to 60kv bias,750Kohm at250V. other things are good. Notes: In attachment files all hand writing and circled TM2 should be TM4.  the results are measured on TM4 not TM2.

 Active trash was placed into an unmarked pail and place in spot 7C of the vault the pail measured 321uSv/hr when removed from the SHC. See attached PDF for details.

TM2 has been moved to TCS and under good vacuum. TP1/2 work fine.  Electrical check: A to PQ still dead short. B to C @250V 3.8M which is ok still . We knew these two things before. Other things are good. Vacuum: air to vacuum seals on TM2 service cap are good. Helium pressure test on all water lines are good. HS line no target so can't be tested. But We did helium pressure test on each target change so it's fine.

TM2 TP1/TP2 and TCS:TP1S have been started at TCS. The starting time and operation of turbo pumps are ok. TM2 had been stored in silo since last Oct.

TP1/TP2 work fine over long weekend and TCS vacuum is good. I switched off TCS vacuum system.