 Thursday, April 05, 2018, 11:29, David Wang, ITW, Maintenance, , , ITH MP1 replacement
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ITH MP1 is replaced today with a new style pump.The new pump is 0.75 inch higher than old pump on inlet and exhaust so a new solid inlet adapter
(KF50-25) has to been used. For future secondary pump ITH MP1S replacement, we need a new adapter 0.75 inches shorter as well. The new pumps
is started . Everything works fine. Old pumps is drained , bagged, and stored in TH B2 level. All radioactive garbage produced during the job are bagged |
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Monday, April 09, 2018, 06:36, David Wang, ITW, Standard Operation, , , ITW Turbo -pumps switch off
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| I asked MCR to switch off ITW TP3,4 TP1s,2s this morning. |
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Tuesday, April 17, 2018, 11:05, David Wang, ITW, Repair, , , Disconnect ITW entrance module
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ITW entrance module has been disconnected. All connections are labelled before or during disconnection. The 24VDC electrical plug on ITW TP1S is
broken . It will be replaced with a new plug. The lift yoke is installed onto module without difficulty. |
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Friday, May 04, 2018, 11:21, David Wang, ITW, Repair, , , 2A2 winodw leak check in TH
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Anders and I leak checked new 2A2 window seal on ITW side. Leak detector was connected to ITW TP4. Base leak rate 0.0Xe-9 atm.cc/sec.
base pressure 0.0xe-4 torr. Sprayed 15-20 psi directly underneath 2A2 window by using exist 2a2 window leak check copper tube. The leak detector
got response in 5 seconds when helium was applied. the leak rate was 5xe-6 atm.cc/sec. Once the helium source was closed, the leak rate dropped quickly |
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Wednesday, May 09, 2018, 08:48, David Wang, ITW, Repair, , , 2A2 winodw leak check on ITW vacuum vessel.
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Leak detector is connected to ITW TP4. LD Base leak rate 0.0XE-09 atm.cc/sec. Helium line is connected to existing window leak check 1/8 " copper
tube. Applied 18psi helium for 1 minute. No response on LD. The window seal is good on ITW vacuum vessel. |
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Tuesday, May 15, 2018, 10:21, David Wang, Conditioning Station, Standard Operation, TM4, , Tm4 water circles helium pressur test result
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Helium pressure test on TM4 water lines is done this morning. 70 psi helim , 1 minutes time to each
circle. The result:
A(oven+): 0.00xE-9 atm.cc/sec |
Friday, May 18, 2018, 09:34, David Wang, Conditioning Station, Repair, TM4, , water leak on TM4 Tube heater - B line confirmed. 
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At 8:50 AM today, I applied water to TM4 tube heater - (B) line at TCS. All high vacuum gauges got response on this action. Water is leaking through
B line on TM4.
It should be D line . David 2018-06-05 |
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Wednesday, May 30, 2018, 09:51, David Wang, Conditioning Station, Repair, TM2, , TM2 water lines helium pressure test at TCS.
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I did a helium pressure test on TM2 water lines at TCS. We will remove the TM2 source tray soon so this test is a reference check for future new source.
The result:
Helium 70 psi, 2 minutes to each circiut. Leak detector base LR.0.0x e-9atm.cc/sec, base pressure 0.0x e-4torr |
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Wednesday, May 30, 2018, 09:55, David Wang, Conditioning Station, Repair, TM2, , TM2 and TCS vacuum pumps are switched off.
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| I switched off TM2 and TCS vacuum pumps. The TCS and TM2 will be under vacuum without pumping. |
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Thursday, June 14, 2018, 11:37, David Wang, ITE, Standard Operation, TM4, UC#22, TM4 UC 22# checklist.
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| See attachments |
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Tuesday, July 03, 2018, 14:38, David Wang, ITW, Standard Operation, , , ITW water signals interlock check.
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| Annual ITW water signals interlock check are done. Everything works good. |
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Tuesday, July 03, 2018, 14:42, David Wang, ITW, Standard Operation, TM2, Nb#8, TM2 has been connected to ITW.
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| TM2 has been connected to ITW. All turbo pumps are started. See attachment for connection checklist. |
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Thursday, August 02, 2018, 07:57, David Wang, Conditioning Station, Standard Operation, , , Leak check on TM2 UCx #23 @ TCS and SHC.
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I did a helium pressure test on TM2 HS line at TCS. At 70psi helium, the leak rate is 2.5 xE-7 atm.cc/sec. I think this is the number that close to result
before which is 1.7xE-9 atm.cc/sec. WE know there is a small leak on this water block seal. Chad and I did helium spray check yesterday at
SHC. It was good at bottom scale. No much worry on this low E-7 range leak. |
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Tuesday, August 28, 2018, 14:19, David Wang, ITE, Standard Operation, TM4, Ta#56, TM4 Ta#56 disconenction.
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| TM4 has been disconnected in ITE this morning. See attachment. |
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Thursday, August 30, 2018, 07:42, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 has been connected to TCS.
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| TM4 has been connected to TCS. vacuum system and water system are started. Everything looks fine. |
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Thursday, August 30, 2018, 07:46, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 HS line leak check at TCS and SHC.
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Chad and I leak checked TM4 HS line after UCx 24 is installed. No leak at 5xE-9atm.cc/sec. Today, I did helium pressure test on HS line at TCS.
No leak at 70 psi helium 0.0xE-9 atm.cc/sec. |
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Tuesday, September 04, 2018, 08:18, David Wang, Conditioning Station, Standard Operation, TM4, UCx 24#, Stppped TM4 and TCS vacuum and water system at TCS.
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| I stopped TM4 and TCS vacuum system at TCS. TCS and TM4 is venting with argon now. |
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Friday, September 07, 2018, 10:47, David Wang, ITE, Repair, TM4, UCx24, TM4 TP2 replacement
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TM4 TP2 could not be started after module was connected back to ITE on Sep 04th. It was replaced with a new pump on Sep 05th. The new pump works
fine. |
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Friday, September 07, 2018, 10:55, David Wang, ITE, Standard Operation, TM4, UCx 24#, TM4 has been connected to ITE/ Checklist
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| TM4 has been connected to ITE on Sep 04th. See attachment for checklist. |
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Friday, September 21, 2018, 10:06, David Wang, ITW, Standard Operation, TM2, UCx23, TM2 was disconnected in ITW.
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| TM2 was disconnected in ITW this Tuesday. See attachment for checklist. |
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