ITE clean up is done.  HV cage inside is wiped.

Rust on S/W silo and cover plate stored at silo area are cleaned up.

A small leak has been found on TM4 Ta(-) which is marked as "B" on terminal blocks. The LD base Leak rate is 1.2XE-8 atm.cc/sec. 70psi helium has been applied to Ta(-) water line for 3minutes. The leak rate went up to 2.5xE-6 atm.cc/sec and stabilized there. Anders found a helium response on RGA helium reading during the same time. This confirms the leak is real. Other lines are leak checked today also. They are good still. All TM4 water lines were leak checked in ITE in 2017 January. They  were all good at 0.0 X E-9 atm.cc/sec. See attachment e-log.

Leak check on TM4 Ta(-) water lines in service cap is done. LD base LR after 50minutes pumping down:0.0xE-9 atm.cc/sec. base pressure: 0.0XE-4 torr. I sprayed lots helium on welding stems on Ta(-) line in service cap including stems in blue nylon insulator and stems to service tray.  no any response has been foun on LD. The Ta(-) line in service cap is leak free.

 Totally panel open and leak check time is about 12minutes. Argon vented TCS before leak check this morning. 

This morning, The helium pressure leak check on TM4 Ta(-) is done after TM4 finished conditioning yesterday.  LD base LR:8.0XE-9 atm.cc/sec, base pressure: 0.0XE-4 torr. Applied 70 psi helium to TM4 TA(-) water line. The LR slowly climbed to 2.2XE-7 atm.cc/sec, and stopped there. Waited for 5 minutes and change at 2.2 X E-7 atm.cc/sec.

 Argon vented TCS and TM4 after pumps are stopped.

Today, I checked TH crane main hoist  when shielding plug is installed into ITE pit. I did  some jogging actions on main hoist during the operation. Everything looks fine. No burning smell, no strange noise. An outside crane expert suggest that jogging is the worst working situation for crane. We have to use jogging actions during our crane operation. But, we could try to use less jogging when operate the crane.

all turbo-pumps are started. Everything looks fine so far.

ITE target module tank flange o-ring was replaced yesterday before TM4 moving. ITE: IG1S reading looks fine so far. 

I started two turbo-pumps on TM1 and one small TP on TCS. They are work fine. 

TM1 inside service cap surface and shielding plug surface are visually inspected yesterday. No rust has been found. I cleaned all rust on top of TM1  today.  Rust on TM1 silo  top plate are cleaned as well.

Chad and I did leak check on TM1 HS line at SHC. 0.0XE-9 atm.cc/sec.  No leak.

Roughing down overnight. Turbo pumps are started this morning. Everything looks good so far.

 We have a ram installed on SHC pole which is 0.5 meter to  module shielding block surface. the readings we got today during TM3 move:
at containment box center (highest reading): 3.14 msv/hr.
at bottom  of shielding blocks: 960 usv/hr.
at 1/4  of  shielding blocks height from  bottom :700usv/hr.
at 1/2 of shielding blocks height from bottom: 340usv/hr.
at 3/4 of shielding blocks height from bottom:140u/sv/hr.
   The Ram is behind the pole and measured the surface which is 90 degree right side of that opened service tray side. 

LD  BLR :0.0 X E-9 atm.cc/sec. BP:0.0XE-4 torr. helium 70 psi. 3 minutes on each circuit

There is a smallleak HS which we did not see before. The HS is checked in SHC  with helium spray yesterday. We did not see the leak . We checked this HS line every time when new target was installed. So mostly, this small leak is from VCRs connected to new target. But, we can not confirm it.  Still this line will be checked on next new target. We should have a better understanding when checking next time.  Other line are almost same as we checked in last year November. I did not see essential change.

Gordon Crane technician Tom Kauss finished the replacement of the east side main hoist brake assembly. A new set up is installed. he adjusted gap too close during first time try. So, the smell appeared when operate the brake. He increased the gap to a proper distance then. It looks like everything works fine now. Still, The brake need to be tested with 10K lBS load on it. We will do the load test on next Thursday when he come here to replace west side brake assembly.  Before that, No module move or other heavy lifting action should be fulfilled on TH crane.

2017-04-20. Tom Kauss finished the replacement of west side main hoist brake assembly. The old set up will be rebuilt, and stored as spare for the future. The load test is done.  10k lbs load was used for testing. Brakes work fine. No strange noise and smell has been found during the test. 

Update schedule to show job process in TH. See attachment 1,2.

Anders and I found a low frequency issue(13hz only) on TCS TGHT flow sensor when doing TM4 conditioning. By trouble shooting, We found the module water lines are good. the restriction cause this problem in on TCS supply or return water lines to TGHT.  I switched TGHT lines with MSP water lines. The wheel frequency on TGHT is 67.0hz which is pretty high. Now, MSP is using the original TGHT water line(flow sensor frequency 13hz). Flow sensors and thermocouples are switched as well so no control system change is needed on epic page. Everything are re-labeled in TH.  With less brazing joints closing to heater source, the MSP line should be ok. By further troubleshooting this issue, I think the problem on this low flow sensor frequency problem is on those 1/2" Parker gray water lines inside that big  6" white pipe.  See attachments. The lines are are twisted, and could be squeezed in my view. Since everything is enclosed in that big pipe, It is hard to tell where the lines are squeezed and cause this restriction. Comparing to an open guide chase, this round pipe makes everything  difficult. Hard to trouble shooting , hard to remove lines or add new lines. It only looks beautiful. I tried all I can do, But, I have no quick solution to solve this problem permanently.  Maybe, Rob walker and his technicians has better skill or more strength on removing old lines, or adding new lines to solve the problem. 

The TCS bias was turn off before that. The TM2 and TCS are still under vacuum now.

 When lifting up TM2 (20000lbs) this afternoon, TH crane has a strange noise on main hoist. The module was lift up less than 1 feet.when strange sound was noticed.  The module move was stopped right away,and module  was lowed back to SHC. The strange noise was confirmed later with SEG block six inches lifting up. Gordon crane technician will be here to tomorrow morning to investigate the problem.