The results of yesterdays electrical check of TM#4 with no target attached. See the attached PDF for details.

 Electrical check of TM#4 with SiC#37 attached post beam. A short was found between the Einzel Lens and Chassis. See attached PDF for details.

 TM#4 with SiC#37 has been moved from the East Target Station to the South Hot cell.

Yesterday we installed the 2a2 window, the drive screw was torqued until 70 ft-lbs and we stopped, the yoke is not fully closed to its hard stop with roughly 7/8" to 3/4" still to go. Similar to identical conditions to 2a3 beamline window install, see https://elog.triumf.ca/TIS/RH-ISAC/647 for that install. Otherwise clamp looks centered and installed correctly.

Concerns with the cooling lines for the window WRT to the base of the shielding plug: There is no jog bend indicated on drawings for the transition of the window cooling lines from beamline center to the corner of the shield plug penetration. See photo for cooling line position on initial removal of shielding plug. It was decided to not add a jog for the shield plug and to carefully reinsert it being mindful of the cooling lines.  The shielding plug has a chamfer on the corner to allow the cooling lines to be routed to the top.

A new beam tube cradle is being manufactured where the old one will removed and the new one swapped with the beam tube in situ. Both sides of the window still need to be leak checked.

Vacuumed out remainder of debris from the wall penetration, removed cradle and checked condition. Down stream support bracket sees advanced stages of material loss (OBO 20-30% loss). See attached photos.

RPG reports that the removed beam tube has 15k CPM on the interior of the beam tube.

Tank flange was cleaned as per 2009 repair report, looks OK. Video capture of flange inspection attached as .zip file.

.03" shim was inserted into the clamp indexing block.

2A2 window has been removed from ITW and beamlines has removed the beamtube from the penetration. The penetration has been sealed with plastic sheeting and duct tape to maintain the ventilation depression between the 2A tunnel and the Target Pit.

Window is currently stored in a lead flask in the target hall. Window fields are 26 mSv/h OC, 1.2 mSv/h at .5m. There is a 10 uSv/h field outside the flask with the window inside it.

Clamp is currently sitting bagged in ITW Station Pit, it is quite corroded.

Tank flange was video inspected but still needs to be cleaned, currently there is a slip on dust cover over the flange to protect it.

Work will resume after the nuclear ventilation comissioning is completed.

 The west entrance module has been moved from the west target station to the silo.

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.   

 Ta#55 has been moved from the south hot cell to the spent target vault. It was 30.4mSv/hr upon removal from the hotcell, placed in pail #161 and put in spot 7A of the vault.

 TM#2 has been moved from the south hot cell to the south west silo.

 TM#2 with Ta#55 has been moved from the west target station to the south hot cell.

I asked MCR to switch off ITW TP3,4 TP1s,2s this morning.

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 , tagged, and stored in TH as well.

 All targets in the ISAC Spent Target Vault have been either assayed and had field measurement done on them or just measurement if to hot to assay.

Two small water leaks have been found on ITW High active water system. One is from an unused 1/4" copper valve stem. another is on supply 1.5" supply line valve body top sealing. Both of them are seeping water from seal. 1/4" copper valve will be replaced with a new one. 1.5" supply line valve will be replaced by an old valve with all new seals. I have all spare parts in hand.  At present, water supply to ITW are stooped to reduce leak rate. Two aluminum flat tray are put underneath leak valves to hold small amount leak water. Both leak will be fixed in April  mostly.

HALCW resin can flow meter replacement is done. Less that 100 mL water was drained to a small tray during the job. RPG checked the water. Less than 20 counts. Water are dumped the high active sump.   The HALCW MP1 is started. No leak on new gauges and fittings. Old gauge is labeled , bagged, and stored in TH.

I can not see oil in sight window of the primary pump during visual inspection. The aluminum tray underneath the pump is filled with oil. The performance on this pump start to drop by watching ITH CG4 reading. A fault report with suggestion is issued to vacuum group.  Everything on secondary pump looks fine.

The job is done. See attachment.

 The spent target assay was aborted today after the first target was finished due to the very old computer that controls the camera and the vault door effectively died. The vault door had to be closed using the emergency door closing winch which worked so it passed that test.

2018-02-27: Anders and I finished leak check on ITE primary and second vacuum vessel seals. LD connected to ITE BV2 valves between. LD, Base Leak rate 1.2 xE-9atm.cc/sec, base pressure 0.0XE-4torr. There is a leak has been found on TM4 service cap KF25 blank off. The o-ring on the blank off will be changed later. It is an easy fix . Other seals are good. The big T tank seal on secondary vessel is leak checked as well. It is still fine.  Helium pressure on TM4 water lines will be fulfilled at TCS to save dose.

2018-02-28 Leak checked ITW today, LD connected to ITW BV2 valves between LD base LR0.0XE-9 atm.cc/sec. base pressure 0.0Xe-4torr. There is leak has been found on exit module 1 service cap  on  topcover plate   o-ring. The leak is located on the south side of east edge on exit 1. This is the side module 2 is close beside. The leak rate is up to middle of E-8atm.cc/sec  range with 1-2 second helium spray. The leak and leak position are double checked and confirmed.  To completely fix this leak, the o-ring for top cover plate need to be replaced on service cap.It will be a major shut down job.  The  leak is close to ITW TP3 so it is less affect on beam line elevation vacuum.  Vacuum group experts will be consulted to see if we could leave it to next year shutdown.  Other seals are good including big T-tank seal on secondary vessel. TM2 source tray will be replaced this yea rso no helium pressure test on water lines is needed at this moment.