ITH:MP1 is replaced this morning due to its poor performance started yesterday afternoon. The general field in pit is about 260usv/hr. the contact field on pump is 2.0 msv/hr. New pump works good. Lubricant in pump will be drained next week. then motor will be removed. The pump body will be bagged and stored in silo area.

TM2 has been disconnected in ITW. All water lines are nitrogen purged. Filled 60 psi argon to all Tm2 water lines for module storage in winter shut down.

ITW primary and secondary vacuum vessel leak check and TM2 water lines helium pressure test are done today. No major concern. see attachment for small air to vacuum leak we found.  TM2 water lines helium pressure test is fine.   HS and window line leak rate are 1.4Xe-8 atm.cc/sec. all other water lines are below 3.0XE-9atm.cc/sec.

After Tm3 service tray and service cap installation, TM3 service cap air to vacuum seals leak check has been done at TCS. TCS:IG1 and IG1S are at low E-7 torr range.  leak detector base  0.0XE-9 atm.cc/sec,  base pressure0.0X E-4 torr.  I sprayed helium to all new air to vacuum seals on service cap. No leak on seals. The leak check has been repeated  2 times with same result.   

ITW entrance module has been disconnected per document190510. It will be moved to SHC for diagnostic group tomorrow.

ITW entrance module has been moved from ITW to SHC. The move is smooth.  I cleaned entrance module tank flange and o r-ing slot.  entrance module tank flange o ring  is replaced .

Ta#66 post operation electrical check was done at SHC this Monday. See attachment.

ITW entrance module has been moved from SHC to ITW. A slightly bump on module shielding block bottom side corner to tank vessel side when lowed module into tank. No big concern on this slight  bumping. Otherwise the move is perfect.

Entrance module has been connected in ITW pit per document 190510 " entrance module disconnection and removal procedure".

Tm4 waterlines helium pressure test and TM service cap helium leak check was done last Friday. All water lines were pressurized with 70psi helium for 3 minutes each. The 3 minutes stable leak rate on all lines are less than 4.0 X E-9atm.cc/sec. some of lines had surging leak rate to 2xE-8 atm.cc/sec at the first 10 seconds of pressurization which should be a gas hammer result at the beginning. Based on the numbers, I would say all water lines are leak free still.  I did helium spray on TM4 service cap. There could be a small leak in high E-9 atm. cc/sec on ion gauge and steer service panel o-ring.  I will replace this o-ring when module is moved out of ITE. Other seals are leak free or less than 2.5X E-9 atm.cc/sec leak rate which are good. I am pretty confirm there is a small leak on ITE entrance module top. The leak rate and location will be confirmed when the rest of leak checks in ITE pit are done.

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 2024. 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 for year 2024. 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.

Chad and I did window line VCRs leak check after containment box removal/installation.  The first  pair of  VCRs have leak. Chad changed VCRs. Both VCr fittings on window lines are completely leak free to 0.0 XE-9 atm.cc/sec now.

TM4 has been moved to SMP. The move is smooth. I started SMP vacuum pump. The TM4 and SMP vessel is under vacuum now.

TM4 coil1, 2 and HS are all OL at 250V at SMP after module move. This week, Chad and Carl fixed short issue on coil1, 2 and HS by insert dropped ultem ring back to position at SHC.

ITE primary and secondary vacuum vessel leak check has been done. SST bellow for 2A3M19  wire scanner on entrance module top has a big leak to E-5 atm.cc/sec on tiny helium spray. The bellow will be replaced in March by probe group. The LD base leak rate is affected by this big leak so i cant keep the LD scale at 0.0Xe-9 atm.cc/sec during the leak check. Other seal are leak free to 8XE-9 atm.cc/sec. I have no big concern on ITE vacuum seals status by the result.

ITW exit 1 module was disconnected  for Exit module flange o -ring replacement yesterday. After oring replacement, the module has been reconnected.

ITW exit 1 module tank flange o ring has been replaced. the old o r-ing was completely flat in slot without elastic property.  tank flange, module flange, and o ring slot were clean by acetone and canister vacuumed. Raised up module 3 feet and pulled new o-ring over module top so new o ring could be  installed without moving module out. after new o ring installation, craned down module to flange and raised up module 2 feet again to confirm the o ring is properly sit in slot.

 ITW entrance module and exit 1 module leak check on module service cap/top air to vacuum seals and module to tank flange  o-rings have been done. all seals and o rings are leak free to 0.0 xE-9atm.cc/sec except one leak ( to low E-6 atm.cc/sec) on ITW RV4 KF50 o-ring was found. It caused by a cross o ring surface scratch on KF 50 flange. the scratch was sanded and polished out. on second time leak check, it is leak free.

100 liters of high active water from HALCW system( mostly from s-tank and pipe lines closing to pumps) are transferred to holding tank in 2A tunnel. Transfer is smooth.  it is a preparation job for ITC:MP1/MP2 refurbishment.  water sample is passed to RPG for assay.