SMP  vacuum pumping down is stopped. SMP and TM4 venting to atmosphere will be started soon.

TM2 HS line helium leak check is done. leak detector base LR 1.8xE-8atm.cc/sec.  helium pressure 70 psi. 5 minutes test. no change on LD leak rate.    I spray lots helium to gas line adaptor and fittings. No leak.has been found  at this base leak rate level.  Since the TCS MP1 has some  issue ,this time the base leak rate on LD only can get to 1.8Xe-8 atm.cc/sec at this moment instead of 0.0xE-9.  The low E-8  level is not perfect, but  i  have no concern on it.

TCS MP1 is replaced due to poor performance( system shows unstable and high reading on TCSCG1A and high TP1,TP2 current draw) . The pump is edward 15i scroll pump. Since vacuum group has no same spare pump, i have to use SMP roughing pump SMP:MP1 which is a  same pump to replace it.. After the replacement ,the TCS:CG1A and TP1, TP2 current draw are back to normal. The original TCSMP1 was surveyed. Swipes on intake and exhaust port are 300 counts and 1000counts. RAM contact field measurement are from 0.2 to 0.5 usv/hr. It is stored in TH. We will try to refurbish this pump first and use as for SMP:MP1. If we can not refurbish it, a new 15i pump will be purchased for SMP:MP1.

2023-05-31: Opened pump tip seal chamber and swiped chamber inside. The contamination level :1200 counts on 44-2.  The tip seal and tip seal chamber o ring need to be replaced . Checked gas ballast knob. The O-ring inside knob is in good condition. Checked exhaust port o-ring. it is in good condition. spare part PO will be issued soon.

2023-06-14:Tip seals and o-ring have been replaced on original TCS:MP1. After, it was tested at TCS for 48 hours. The pump is much quiet on operation, and the pump body temperature is mild. The final  inlet pressure this pump could get with TCS PV1 closed is about 23 mtorr.  The result is good. I installed it back to TCS vacuum station and reinstalled SMP:MP1 back to SMP vacuum station.  

ITW water signal interlock check is done. All ITW water signals including HS, EE, Coil , Ta, Tu, MSP, C-window, HVC1, HVC2, 2A-dump, 2A -shielding plug, 2A-tank, 2A-window, and 2A-collimator are checked. All  water signal interlock work fine.

MAA ASU test have been done following document 154779. All three tests in document are passed. DCR Jas has all test documents.

This test includes the functional test on TH emergency roof hatch which is located at the west end of TH roof. The hatch could be opened and closed properly from TH inside.

Plant group changed TCS water filters last Friday. 4 filters on resin can inet /outlet sides and filters(4 in one cartridge house)on pump return line have been changed. Triumf maintenance tags on filters have been updated. No water leak after job. The TCS TK2 water level dropped  from 20" to 16" because of the job. I will refill the level to 28" today. 

TCS:TK2 is refilled to 28".

ITE water signal interlock check including HS,EE, TA, TU, MSP. Coil1 , C-window ,2a-window, 2A tank, 2A shielding plug , 2A dump, 2A collimator  are done. All things work.

TM2 SiC#6 has been disconnected in ITW. See check list

TM2 TiC#6 post run electrical check has been done at TCS. See attachment

Nb#10 has been installed on TM2 . electrical and leak check on HS line are good. See attachment.

TM2 Nb#10 has been connect at TCS. TCS water system and vacuum system have been started. Everything looks ok so far. TCS Faraday cage is secured for TM2 conditioning at TCS.

HALCW system O2 sensor service and calibration were done in Sep 26th. electrolyte and membrane on rose mount sensor 499ADO were refilled and replaced. Sensor was zero and full scale calibrated. The sensor works fine after the job.

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.