LD  BLR :0.0 X E-9 atm.cc/sec. BP:0.0XE-4 torr. helium 70 psi. 3 minutes on each circuit

There is a smallleak HS which we did not see before. The HS is checked in SHC  with helium spray yesterday. We did not see the leak . We checked this HS line every time when new target was installed. So mostly, this small leak is from VCRs connected to new target. But, we can not confirm it.  Still this line will be checked on next new target. We should have a better understanding when checking next time.  Other line are almost same as we checked in last year November. I did not see essential change.

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 brake assembly.  Before that, No module move or other heavy lifting action should be fulfilled on TH crane.

2017-04-20. Tom Kauss finished the replacement of west side main hoist brake assembly. The old set up will be rebuilt, and stored as spare for the future. The load test is done.  10k lbs load was used for testing. Brakes work fine. No strange noise and smell has been found during the test. 

Update schedule to show job process in TH. See attachment 1,2.

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 thermocouples are switched as well so no control system change is needed on epic page. Everything are re-labeled in TH.  With less brazing joints closing to heater source, the MSP line should be ok. By further troubleshooting this issue, I think the problem on this low flow sensor frequency problem is on those 1/2" Parker gray water lines inside that big  6" white pipe.  See attachments. The lines are are twisted, and could be squeezed in my view. Since everything is enclosed in that big pipe, It is hard to tell where the lines are squeezed and cause this restriction. Comparing to an open guide chase, this round pipe makes everything  difficult. Hard to trouble shooting , hard to remove lines or add new lines. It only looks beautiful. I tried all I can do, But, I have no quick solution to solve this problem permanently.  Maybe, Rob walker and his technicians has better skill or more strength on removing old lines, or adding new lines to solve the problem. 

The TCS bias was turn off before that. The TM2 and TCS are still under vacuum now.

 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.

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.

Below is a report on the ISAC Target Hall crane brake issue observed yesterday and addressed today:

- On April 13^th, both the East and West hoist brake assemblies were replaced by Gordon Crane & Hoist, after David observed a burning smell

- The East assembly was replaced with a completely new brake assembly from Kone crane

- The West assembly was replaced with a refurbished assembly, which used the East assembly housing fitted with a rebuild kit by Gordon Crane

- Yesterday while preparing TM3 for a lift, David noticed a vibration / rattle sound coming from the West hoist brake

- This issue was only observed when starting the hoist from a complete stop, at the slowest possible upwards hoist speed

- Once the hoist speed increased, the sound went away, even after returning to a slower speed

- Tom from Gordon Crane & Hoist came in this morning at 7am and replaced the new West assembly with the original West assembly, which had at that point also been fitted with a rebuild kit at Gordon Crane’s shop

- Tom also inspected the East brake assembly again

- Tom commented that he had issues setting the right gap between the friction plates and the brake rotor – too close and the brake would not release properly, too far and the brake rattle issue would be observed

- He also commented that during this most recent repair of the West brake, he applied never seize to the shaft and spline to ensure that this friction point was not an issue

- After Tom finished his repair and inspection of the brakes, David attempted a test lift of an SEG block (10 ton) at the slowest lift speed

- The rattle noise coming from the West brake was still observed

- Travis also tested the slowest speed in Remote Test mode from the control room, with David and Grant present in the Target Hall, the rattle was also still observed

- Tom advised that the rattle would not affect the safety of the hoist, and no damage would be done to the brake assemblies by running the hoist normally with the rattle noise

- Tom ensured that he would consult with Aiden and they would likely order a brand new West brake assembly from Kone

- Tom called Aiden Gordon to confirm that it was ok to proceed

- Aiden called me around 1:30pm and left a message that the slow speed rattle sound was benign and that we could proceed with normal operations, but he would definitely address the problem moving forward, and we should standby for his report

Photos and video have been uploaded to Docushare.  The hoist noise before the repair and after the repair during the test lifts can be heard in the videos.

https://documents.triumf.ca/docushare/dsweb/View/Collection-19812

Thanks and regards,

Grant

--

Grant Minor, M.A.Sc., P.Eng.

TRIUMF Remote Handling Group Leader

Nuclear Engineer

4004 Wesbrook Mall, Vancouver

BC, Canada, V6T2A3

gminor@triumf.ca

(604) 222-7359

http://www.triumf.ca/profiles/4557

containment box was re-installed onto TM3 on Monday, Left manipulator may be showing signs of eminent handle or tong cable failure.

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.

the containment box has been removed from TM3.

chad fisher wrote:

A video inspection of the lower service tray was performed this morning. Camera was inserted upwards into the service tray/service chase from the containment box. One potential spark mark was identified as well as epoxy not flush with insulator. Fiberglass does not extend into service tray/chase much and does not look, from initial inspection that it will be too difficult to remove. Video can be found in docushare Document-142295

 The attached picture is from the video: showing the fiber glass inside the Service Tray.

 Installation of the NHC right side manipulator was completed yesterday.  The three piece manipulator was assembled in the module assembly area on the manipulator cart which was then craned through the hatch to the NHC service area (the slave end had to be removed for it to fit through the hatch).  The installation went relatively smoothly except for the second (cold side) piece of lead shielding around the thru tube which would not fit because the OD of the two halves were not concentric when assembled (arrived this way from CRL).  The shielding was removed and 0.070" was cut down on the lathe, after which installation could be completed.  The slave end lift bail and the pulley cover panel had to be removed for the manipulator to fit through the thru-tube.  Both these items were reinstalled after the manipulator was in the wall, and it was confirmed that the slave end lift bail aligns with the slave-end removal hatch in the NHC roof.  There was some difficulty getting the slave end to the horizontal position using the Y motion drive, also while preparing the manipulator for installation we noticed one of the Z motion tapes on the master side was sliding to the edge of one of the pulleys and rubbing - both these issues will be investigated at a later date.

We confirmed that it is possible to remove the master end using the manipulator cart.  We will practice doing this at some point before the cell is commissioned.  We will also do a run-through of slave end removal through the NHC roof.

Electronic copies of the Model-N installation and removal manual as well as the manipulator cart user manual are attached for future reference.

TCS:MP1 was tripping of intermittently yesterday. It was found by Dave Morris that the current sensor was not set correctly causing the pump on status to flicker at times. Dave adjusted the settings yesterday. The system should be operational and is currently running normally.

Fiberglass, capton tape and tie straps have been removed from TM3.

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. But, The life of this brake assembly could be affected.  I would like everyone know this issue. We may need to consult Gordon crane as well. Maybe, The gap should be increased up a little bit.  On this Friday, I will use crane to transfer 30K lbs shielding blocks. It will be a good test on crane main hoist again. 

RU( coil 1), F (anode), and 60kv bias(HS, Gasline, and MSP)  are shorted together. Other lines are good.  They are measured between  individual line each other  @500V. The megga showed OL. All of  them to ground are OL @500V as well. EL is grounded during check.

 The window cover panel has been installed on the hot side of the NHC shielding window according to drawing IRH1638.  It was necessary to drill and tap a hole in the steel frame first to achieve proper grounding for stud welding.  The strength of all studs were checked by installing a nut on the stud tightened against a block up against the steel frame, which was then torqued to a minimum of 10 ft*lbs.  For the final installation the nuts were each torqued to approximately 3 ft*lbs.  Visibility from the cold side of the cell was checked before and after installation by Chad Fisher and Isaac Earle:  no distortion was caused by the new cover panel and with the in-cell work lights aimed in a similar direction to how the permanent lights will be installed (shining down from the roof, and also aimed south from the periphery of the window) there was no significant decrease in visibility of the work space.  A couple of small scratches are visible on the panel surface - these were already there when the panel arrived at TRIUMF.  The panel has been installed in an orientation that will minimize the visibility of these scratches during normal work.  When the work lights were aimed at the window many imperfections in the panel were visible, however this is not expected to occur during normal operation.  After the cell lighting has been installed the visibility will be re-evaluated and a new panel can be procured if necessary.  

Five spent targets have been moved from the target storage vault to the mini vault in preparation for Thursdays loading of the F-308s. See attached for the list of targets in the mini vault, and the new status of the storage vault.

During TM3 roughing down yesterday afternoon,The vacuum gauges CG1 and CG1S stopped at 1.20 torr and refused to drop down. Leak detector was used to found where the problem was. LD was in rough detecting mode and showed 2.7xE-6 atm.cc/sec as base leak rate.  Spray medium amount of helium to TM3 service top, and found this leak was on round panel of TM3 side wall. LR climbed to E-4 atm.cc/sec range on helium spraying. In my vie,One 10# socket head screw was not tightened properly after cameras job and caused this.  The TCS was vented. The panel was took off and reinstalled. O-ring on the panel  was replaced by a new one as well. Then TCS was pumped down again. The leak disappeared .  All turbo pumps on TCS and TM3 were started successfully later.