 Thursday, March 30, 2017, 11:21, David Wang, Conditioning Station, Repair, TM4, , Leak check on TM4 Ta(-) water lines in service cap
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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. |
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Tuesday, April 04, 2017, 10:23, David Wang, Conditioning Station, Standard Operation, TM4, , Helium pressure leak check on TM4 Ta(-) water lines
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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. |
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Tuesday, April 04, 2017, 10:24, David Wang, Conditioning Station, Standard Operation, TM4, , Stopped TCS pumps this morning
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| Argon vented TCS and TM4 after pumps are stopped. |
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Tuesday, April 04, 2017, 14:39, David Wang, Crane, Standard Operation, , , Crane check main hoist on jogging with shielding plug lifted.
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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. |
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Tuesday, April 04, 2017, 14:40, David Wang, ITE, Standard Operation, TM4, , TM4 has been connected in ITE
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| all turbo-pumps are started. Everything looks fine so far. |
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Wednesday, April 05, 2017, 11:57, David Wang, ITE, Maintenance, , , ITE target module flange o-ring repalcement
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| ITE target module tank flange o-ring was replaced yesterday before TM4 moving. ITE: IG1S reading looks fine so far. |
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Wednesday, April 05, 2017, 14:13, David Wang, Conditioning Station, Maintenance, TM1, , TM1 and TCS vacuum system are connected together
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| I started two turbo-pumps on TM1 and one small TP on TCS. They are work fine. |
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Thursday, April 06, 2017, 12:33, David Wang, Conditioning Station, Repair, TM1, , TM1 rust inpsection and removal
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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. |
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Tuesday, April 11, 2017, 14:06, David Wang, Conditioning Station, Standard Operation, TM4, , SHC, TM2 leak check on HS line.
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| Chad and I did leak check on TM1 HS line at SHC. 0.0XE-9 atm.cc/sec. No leak. |
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Wednesday, April 12, 2017, 07:26, David Wang, Conditioning Station, Standard Operation, TM2, , TM2 and TCS vacuum system has been connected.
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| Roughing down overnight. Turbo pumps are started this morning. Everything looks good so far. |
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Wednesday, April 12, 2017, 12:51, David Wang, South Hot-Cell, Repair, TM3, , TM3 Ram readings @ SHC
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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. |
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Thursday, April 13, 2017, 11:33, David Wang, Conditioning Station, Standard Operation, TM2, , Helium pressure test on TM2 water llines at TCS.
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LD BLR :0.0 X E-9 atm.cc/sec. BP:0.0XE-4 torr. helium 70 psi. 3 minutes on each circuit
HS
1.8XE-7 ATM.CC/SEC
TA+
1.4 XE-7
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Thursday, April 13, 2017, 14:16, David Wang, Crane, Repair, , , TH crane: east side main hoist brake assembly is replaced.
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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 |
Wednesday, April 19, 2017, 08:29, David Wang, Conditioning Station, Standard Operation, , , TH schedule 132 update in first beam week 
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| Update schedule to show job process in TH. See attachment 1,2. |
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Friday, April 21, 2017, 08:19, David Wang, Conditioning Station, Repair, , , Low frequency on TCS TGHT flow sensor.
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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 |
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Monday, April 24, 2017, 09:52, David Wang, Conditioning Station, Standard Operation, TM2, , Switch off TCS water system and vacuums
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| The TCS bias was turn off before that. The TM2 and TCS are still under vacuum now. |
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Monday, April 24, 2017, 16:06, David Wang, South Hot-Cell, Repair, TM2, , Crane main hoist strane noise when lifting up TM2
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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. |
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Monday, April 24, 2017, 16:11, David Wang, Conditioning Station, Standard Operation, TM2, , TCS TP1s is restarted.
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TCS IG1S is switched on as well. The reason to start the pump is to prepare a possible extended TM2 conditioning at TCS caused by TH crane issue.
TCS:TP1 and TP2 are not switched on for this. |
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Wednesday, April 26, 2017, 10:24, David Wang, ITW, Standard Operation, TM2, , TM2 ITW
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TM2 was moved and connected in ITW yesterday afternoon. After roughing down, ITW turbo pumps are started. ITW TP4 can not be started to full speed. ISAC
ops kept it at low speed mode with less than 1.0A current draw on pump. ITW IG1s shows red as well. I will take a look on them today when beam is off.
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Monday, May 01, 2017, 12:32, David Wang, Crane, Repair, , , TH crane burning smell
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TH crane burning smell showed again this morning. It appeared after 1-1.5 hours of continuously using during the F308 flasks moving in TH.After a certain
time of using I think the brake gap is reduced because of thermal expansion. The main hoist and brakes work fine still. We knew these brakes gap
are tight especially on west side. So, It is not surprised that this burning smell appeared again. It does not affect the safe of crane use in my view. |
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