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.

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.

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.

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.

 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.

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.

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

 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.

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.   

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

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.

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.

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.

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 back to base level. To confirm the leak is at window , I sprayed 15 psi helium around all top flange seals of TM and entrance module.  There was no direct response during the spray( about 1.5- 2 minutes). There was a weak slow up response (up to 1.0 xe-7 atm.cc/sec) which was started after 1.5 minutes of spray. The weak response is cause by helium drift in my view.   Our conclusion is the 2A2 window seal on ITW side is not perfectly sealed.  The elak we saw on LD is ture , and it is located on window.  The station will be vented soon for shielding plug moving back. .

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. 

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

Link to e-log,

Link to efault

Tank level down from 76 to 55 in on TK1

Valve replaced by Curtis today

 SiC#37 has been moved from the South Hot Cell to the Spent Target Vault. It was placed in Pail #165 and put in spot 3B of the vault and it measured 25.8mSv/hr upon removal from the hot cell. See the attached PDF for details

 A Motorla CP200 portable two-way radio was tested today for use inside the ISAC hot cells.  A High Technology Communications Throat microphone PRO model from Planet Headset was used with the radio.  Chad entered the NHC wearing the throat mic and radio under a air supplied hood to mimic real world conditions.  Communication was clear with the other person in the NHC service area, in the SHC service area, at various locations on the B1 level, and even with an operator in the TRIUMF Main Control Room.

This testing satisfies RS 104 of the NHC requirements specification (Document-131915, Release 1)

Field measurements have been taken to determine the level before entry for repair of manipulators.

Field on contact at manipulator is 560 uSv/h, and at approximately 1/2 meter at table surface 920 uSv\h.