Transfered the 2A window from the ISAC Storage Vault to the Cyclotron Vault Tunnel Storage area. RPG storage form attached.

TM4 service cap rust are cleaned out at TCS. All top surface of TM4 are wiped and cleaned . The module looks good now. see attachments

Strange noise and a burning brake type smell was observed yesterday by David and Anders when running the main 20 ton hoist locally.  A service call was arranged today with Gordon Crane.  No major issues were found.  A more detailed summary is in the attached e-mail correspondence.  Gordon Crane will issue a formal report, but they recommend replacing both sets of brake disks and brake calipers. - Grant

Electrical check of the Ta test target on TM#2

TM#2 has been moved from the east target station to the south hot cell.

Yasmine and I did a rust inpsection on TM4 service cap inide surface and shielding plug surface. No rust has been found. Also, all steel bolts on this surface look fine. The inside of silo held this module are rust free as well.  See attachments

TM#4 has been moved from the SW Silo to the conditioning station.

All target in the ISAC spent target vault have been either assayed or had their fields measured or both.

The west 'Z' motion cable on the east manipulator has successfully been replaced. The job took slightly less than an hour (including inspection of the scissor table hoses) and I received 0.075mSv. Scissor table hoses appear to be fine and also didn't "shed" or flake at all when checked by hand.

I watched rust on TM4 and its silo. Most of rust are on est side of module and silo. See attachments

I have moved the suspected "hot" items in the hot cell and placed them under some lead bricks. I have re-measured the fields and it has been reducded to 90 uSv\h at the manipulator repair area and 110 uSv/h at the previous 1.82 mSv\h area.

Did a dry run with the latest procedure with Dan Mcdonald. Elapsed time was approximately 30 min.

I have re-measured the fields in the hot cell. Fields at shield door Al cover are 101 uSv\h, in cell at the east manipulator are 245 uSv\h, and the largest field is 1.84 mSv\h...this appears to be the high current fasteners removed from the last target.

The fields in the hot cell have been measured by means of a pole monitor through the tool port. Field was measured to be 25 uSv/h.

By retrieving data further, It has been found no directly relationship between IG1S surging and dump plug water opening. Vacuum surging is 10minutes ahead dump water supply to circuit. SEE attachment 1. Also, The ITE IG1S start to behavior unusual in middle of Feburary. See attachment 2. Today,  ITE IG1S is still slowly climbing up. I decide to leak check ITE vacuum vessel. Before  leak check, for more information and trouble shooting. I closed water supply to ITE to see if vacuum has response on it. I will return water supply to ITE  tomorrow morning.

Water supply to ITE is returned this afternoon at 2: 10 PM.  Everything works fine so far

I leak checked ITE secondary vessel vacuum. A leak have been found in March 09th noon which is located between entrance module and TM2 top tank flange o-ring seal( on tank flange). It could not be confirm on which side of the o-ring the leak is from.

During last night, ITE IG1S reading went back to normal low E-7 range and stays in this range now. So I leak checked same area again this morning. The leak disappeared now. The o-ring works sometime , but not all the time. The plan for this issue: Change ITE target module side o-ring when TM2 is move out., and watch on the ITE IG1s when TM4 is moved back to ITE and pumped down.

It is closed @ 2:35PM by closing supply side valve first , the return side valve of ITE dump plug .

Opened ITE dump plug circuit valves @4:28PM. ITE IG1S still at 1XE-6. No change before and after of circuit closing and reopeneing.

Leaking seals on ITW HALCW 2" return line ball valve have been replaced. 8 liter waters are drained out for this job. Water are drained into a thick plastic bag.  The bag is tie strapped , labeled, and put into a yellow garbage bin in MAA. Water sample is given to RPG. After analyzing, RPG will give instruction on how to deal with it. Since we just refilled NALCW to system before this job, the active level on sample is very low. We may dump them into active sump.  After seals change, The system is refilled . I started pump and set everything back to normal configuration. NO leak has been found on new seals. The HALCW system is operating good so far.

HALCW resin tank has been replaced. The old tank is stored in middle-west silo now. The field on old resin tank bottom is about 3.5 msv/ hr(on contact). By shielding it into silo and putting two lead blankets on the top cover of the silo,The general field 1 feet above this silo is 25usv/hr. And, The field around the silo area are less affected. This old tank will stay there as long as possible.  For the new resin tank during preparation, It was found that on return line side, the 1.25" pipe thread plug with return line tube  was very difficult to be installed onto the female thread adapter which is welded onto to tank body. It was jammed in half way of threading onto tank at manufacturer. This plug was removed out first and inspected. The first and second male threads were galled.  Maico repaired the thread on a lathe. The female thread on the tank was tapped. A tight spot was found during the tap. After that, the return line plug could be installed onto the tank properly.  The new tank was installed into the vessel and connected back to HALCW system. Water are refilled into new tank. During refill air were trapped into the system. This caused  pump restarting problem. By Several times of starting up the pump, stopping the pump and venting,  Most air were breathed out of  system. Finally,The system was restarted by supply water to ITW( without module) only. ITE and resin can circuits were brought back to system after that without problem.

 Before removing the old tank, We drained water out of old tank to decay tank. Since the resin tank is largely filled with  resin, and water are soaked into resin, we only can drain out less than 10 liters water out of tank. Also, The drain caused some part of return line on pumps have to been drained. This is the main reason air was trapped in system during the new resin tank water refilling. For the future replacement, we should not drain water in old tank. It does not worth to do it. 

Attach TH HALCW resin tank replacement procedure here.

2022-02-17 reload replacement procedure and draining schematic.

 The roughing filter assembly (RFM0001D) has been installed at the ventilation exhaust hole on the NHC partition wall.  The filter used is Model # 332-528-002 supplied by BGE Service & Supply Ltd (see PO # TR123998).  Installation and removal of the filter using the manipulators will be tested after they have been installed.

 The North Hot Cell ducting (IRH1617) has been sealed with a bead of Sikaflex 1a polyurethane construction sealant where the flanged connection bolts to the NHC/TCS partition wall.  When this sealant shows signs of aging it may be cut away and re-applied without unbolting the flange.