ELOG RH-ISAC

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Target/Number down

Tuesday, November 25, 2014, 11:33

David Wang

South Hot-Cell

Development

Remove UCX 11 target transfer stand from SHC back to TH.

The stand was used for transferring UCX11 targte from TH to SHC. The stand wit target was craned down from TH into SHC last week and stayed there over weekend. Chad and I removed the stand out of SHC yesterday. It was heavily contaminated. RPG and I spent more than 3 hours to clean this stand. See the emails I pasted below for detail information.

Thanks, David, for letting me know about this. Here are survey results after my afternoon in Target Hall:

I spent 1.5 hours on additional decon of the stand, crane hook, and area around where David was doing the decon, finding up to 10k cpm (44-2) on some parts at first. Danka came to help after a bit (THANK YOU, DANKA) and we left the items covered in plastic and surveyed the area. Contamination survey results are as follows, numbers are units of cpm on the 44-2/RM14:

Tacky mats inside TMH door: 6000/2000

Tacky mats in hall before TMH door: 200/0

Tacky mats at boot box: 8000/4000

My booties: 50/0

Air sample at the decon area: 50/60 (also 100 cpm on alpha probe)

Floor swipes post-decon of floor: 0/0

Early results from a 10 min assay of the tacky mats shows predominantly Kr-85, Be-7, Sr-85, Rb-83, and Sr-82. A longer assay is underway.

The following measurements were made using the checking cave at the boot box (units of cpm):

David's respirator cartridges: 160

David's respirator: 0

Davids tank suit and booties: 1200

My suit: 100

My respirator: 0

The rags used for the decon work were contained in a bag and left behind the silos by the DST. This bag measured 240 uSv/h OC and 2 uSv/h at 0.5m

Thanks,

Andrew

On 11/24/2014 12:57 PM, David Wang wrote:

Hi all, The UCx#11 target transferring stand is moved back from SHC to TH. However, the stand was heavily contaminated. On the first Windex clean up towel, the counts directly shoot over the 500K counts which is the maximum scales on both RM14 and 44-2. After almost 2 hours, more than 20 times cleaning up with Windex spray and paper towel wipe , the counts dropped below 300 now. It is extremely difficult to clean up this stand. I dont think we should move the target this way again unless we have a solution on the contamination clean up. The stand is still hanging on the crane, and waiting for RPG checking. Thanks David

804

Monday, December 01, 2014, 12:05

F-308's have been serviced and are ready to be filled with spent targets. F-308's witch were serviced are #6,#13,#15,#16,and #19.

805

Monday, December 01, 2014, 14:06

TM2 REFURB. WATER LOOP TEST

Some issues with the turntable and having to wait for a decision on whether to remove TM2 from the hot cell so that TM4 with dead UCx target could be put in this morning.

Progress on TM2:

Containment box has been removed from TM2.
Water block jig has been installed.
Existing blank off has been removed.
Sealing surfaces have been inspected.
First stage of sealing surface cleaning has been performed.

Tomorrow:

Polish of sealing surfaces.
Installation of loop.
Vacuum/helium leak check of loop.

TM2_20141201_03 - sealing surfaces before cleaning...kind of dirty

TM2_20141201_05AC - sealing surfaces after cleaning...looks good!

Attachment 1: TM2_20141201_01.JPG

Attachment 2: TM2_20141201_02.JPG

Attachment 3: TM2_20141201_03.JPG

Attachment 4: TM2_20141201_04.JPG

Attachment 5: TM2_20141201_05AC.jpg

806

Monday, December 01, 2014, 14:48

The F-308s have been moved into the target hall, for filling on wednesday.

807

Tuesday, December 02, 2014, 10:15

TM2 Reburb. Loop Install

Final polish, clean with methanol and clean compressed air.

Loop installed and torqued to 90 in lbs.

Minimum of approximately 1" between loop and containment box at closest point.

Attachment 1: TM2_20141202_01.jpg

Attachment 2: 20141203_142215.jpg

Attachment 3: 20141203_143530.jpg

808

Tuesday, December 02, 2014, 13:33

Leak check on TM2 tube heater +(D) at SHC

Chad and I leak checked TM2 tube heater+(D) circuit at SHC with water bypass loop and new seals installed on the water block. The LD base LR 0.0xE-9 atm.cc/sec,base pressure0.0xE-4 torr. Chad sprayed helium on the leak check area in SHC for 5 seconds. No any response has been found on LD during 1minutes waiting time. The test was repeated again and the result is same. NO LEAK at this stage! After the TM2 is moved to CS , The D line will be pressured with 80 psi helium for helium pressure leak test before any hot water is circuited through it.

Attachment 1: 2014-12-02_003.JPG

Attachment 2: 2014-12-02_001.JPG

Attachment 3: 2014-12-02_004.JPG

811

Thursday, December 04, 2014, 09:57

Travis Cave

Spent Target Vault

Standard Operation

Spent target placed in F-308.

Spent targets in the mini storage were placed into the F-308s yesterday, all F-308 have been removed from the the target hall and they no reside for the time being in the hallway between the north and south hot cells.

812

Thursday, December 04, 2014, 16:37

connected TM2 and CS vacuum system .

I connected TM2 and CS vacuum system. All vacuum pumps on TM2 and CS are started .The pumping down is good so .far

813

Friday, December 05, 2014, 07:47

The pumping down on TM2 at CS was good overnight. However, the back up line pressure is still too high for LD to get to 0.0-E-9atm.cc/sec . It only could get to 1.2xE-7 atm.cc/sec. It is not enough for a good leak check . I dont want to have any ambiguous situation on this" D" line leak check. So,I am going to reconfigure the leak detector to the spare KF25 pot on the TM2 service cap. All pumps are stopped . The CS and TM2 will be vented soon. After that, a manual valve will be installed on that spare KF25 pot for future helium pressure check at CS. Then, The TM2 and CS will be pumped down again.

814

Friday, December 05, 2014, 11:58

helium pressure test on TM2 tube heater +(D) water lines.

At CS, The leak detector is hooked directly to the TM2 top service cap. The base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4torr. Applied 80 psi helium to TM2 tube heater +(D) line . During 3 minutes applying time , I did not see any tiny change on LD readings. The line is perfectly vacuum sealed. See attachment pictures.

Attachment 1: 004.JPG

Attachment 2: 005.JPG

Attachment 3: 003.JPG

Attachment 4: 006.JPG

Attachment 5: 002.JPG

Attachment 6: 007.JPG

815

Friday, December 05, 2014, 13:46

Not able to start water system

TCS:WPV1 does not open when staging is enabled. Multiple attempts have been made, but the valve remains closed.

816

Friday, December 05, 2014, 15:41

Measurement taken at 14:25. IG2 at ~7.7E-6 T

Attachment 1: 2014-12-05-14-25_TM2.png

Attachment 2: 2014-12-05-14-25_TM2.txt

Dec 05, 2014  02:24:20 PM
Residual Gas Analyzer Software 
Software Version, 3.213.008

Analog Scan Setup:

Data Points in Scan, 991 
Units, Torr 
Noise Floor, 2 
CEM Status, OFF 
Points Per AMU, 10
Scan Start Mass, 1, amu 
Scan Stop Mass, 100, amu
Focus Voltage, 90, Volts 
Ion Energy, HIGH 
Electron Energy, 70, eV 
CEM Voltage, 1090, Volts
CEM Gain, 1.05E+003 
Sensitivity Factor, 1.01E-004 
Filament Current, 1.00, mAmps


  1.00,  -2.37E-009, 
  1.10,  -1.01E-009, 
  1.20,   2.41E-007, 
  1.30,   4.15E-007, 
  1.40,   5.81E-008, 
  1.50,   7.25E-008, 
  1.60,   2.27E-007, 
  1.70,   3.21E-007, 
  1.80,   4.11E-007, 
  1.90,   4.28E-007, 
  2.00,   4.25E-007, 
  2.10,   3.71E-007, 
  2.20,   2.93E-007, 
  2.30,   1.50E-007, 
  2.40,   3.59E-008, 
  2.50,   1.46E-008, 
  2.60,   7.89E-009, 
  2.70,   4.71E-009, 
  2.80,   3.12E-009, 
  2.90,   2.24E-009, 
  3.00,   1.52E-009, 
  3.10,   1.05E-009, 
  3.20,   7.24E-010, 
  3.30,   3.94E-010, 
  3.40,   1.21E-010, 
  3.50,   4.73E-011, 
  3.60,  -2.66E-011, 
  3.70,  -6.41E-011, 
  3.80,  -9.17E-011, 
  3.90,  -1.38E-010, 
  4.00,  -7.59E-011, 
  4.10,  -1.99E-010, 
  4.20,  -3.21E-010, 
  4.30,  -2.91E-010, 
  4.40,  -2.63E-010, 
  4.50,  -1.71E-010, 
  4.60,  -5.52E-011, 
  4.70,  -1.60E-010, 
  4.80,  -1.99E-010, 
  4.90,  -2.35E-010, 
  5.00,  -3.20E-010, 
  5.10,  -3.59E-010, 
  5.20,  -2.73E-010, 
  5.30,  -2.03E-010, 
  5.40,  -2.98E-010, 
  5.50,  -2.75E-010, 
  5.60,  -3.27E-010, 
  5.70,  -3.40E-010, 
  5.80,  -3.03E-010, 
  5.90,  -2.27E-010, 
  6.00,  -1.93E-010, 
  6.10,  -1.35E-010, 
  6.20,  -1.47E-010, 
  6.30,  -1.82E-010, 
  6.40,  -2.26E-010, 
  6.50,  -2.62E-010, 
  6.60,  -2.38E-010, 
  6.70,  -2.32E-010, 
  6.80,  -1.77E-010, 
  6.90,  -2.01E-010, 
  7.00,  -2.84E-010, 
  7.10,  -3.27E-010, 
  7.20,  -3.82E-010, 
  7.30,  -3.67E-010, 
  7.40,  -2.50E-010, 
  7.50,  -2.17E-010, 
  7.60,  -2.11E-010, 
  7.70,  -1.24E-010, 
  7.80,  -1.13E-010, 
  7.90,  -1.35E-010, 
  8.00,  -9.66E-011, 
  8.10,  -8.97E-011, 
  8.20,  -1.89E-010, 
  8.30,  -1.24E-010, 
  8.40,  -7.79E-011, 
  8.50,  -4.54E-011, 
  8.60,  -3.94E-012, 
  8.70,   3.55E-011, 
  8.80,   3.65E-011, 
  8.90,   1.97E-012, 
  9.00,  -1.97E-011, 
  9.10,  -5.13E-011, 
  9.20,  -1.09E-010, 
  9.30,  -1.65E-010, 
  9.40,  -1.33E-010, 
  9.50,  -2.24E-010, 
  9.60,  -2.07E-010, 
  9.70,  -2.87E-010, 
  9.80,  -3.25E-010, 
  9.90,  -2.29E-010, 
 10.00,  -2.07E-010, 
 10.10,  -1.94E-010, 
 10.20,  -1.84E-010, 
 10.30,  -6.02E-011, 
 10.40,  -7.30E-011, 
 10.50,  -1.63E-010, 
 10.60,  -1.82E-010, 
 10.70,  -1.42E-010, 
 10.80,  -1.07E-010, 
 10.90,   4.04E-011, 
 11.00,   3.25E-011, 
 11.10,  -2.17E-011, 
 11.20,  -2.27E-011, 
 11.30,  -2.76E-011, 
 11.40,  -7.20E-011, 
 11.50,   3.49E-010, 
 11.60,   1.86E-009, 
 11.70,   3.63E-009, 
 11.80,   5.54E-009, 
 11.90,   7.54E-009, 
 12.00,   8.76E-009, 
 12.10,   8.82E-009, 
 12.20,   7.47E-009, 
 12.30,   4.64E-009, 
 12.40,   2.84E-009, 
 12.50,   1.82E-009, 
 12.60,   1.22E-009, 
 12.70,   9.56E-010, 
 12.80,   9.67E-010, 
 12.90,   8.41E-010, 
 13.00,   8.04E-010, 
 13.10,   7.64E-010, 
 13.20,   5.85E-010, 
 13.30,   4.03E-010, 
 13.40,   2.63E-010, 
 13.50,   4.46E-010, 
 13.60,   1.55E-009, 
 13.70,   2.94E-009, 
 13.80,   4.14E-009, 
 13.90,   5.28E-009, 
 14.00,   6.22E-009, 
 14.10,   6.37E-009, 
 14.20,   5.44E-009, 
 14.30,   3.47E-009, 
 14.40,   2.23E-009, 
 14.50,   1.55E-009, 
 14.60,   1.52E-009, 
 14.70,   1.83E-009, 
 14.80,   2.34E-009, 
 14.90,   2.89E-009, 
 15.00,   3.32E-009, 
 15.10,   3.47E-009, 
 15.20,   3.49E-009, 
 15.30,   3.11E-009, 
 15.40,   4.58E-009, 
 15.50,   2.08E-008, 
 15.60,   9.78E-008, 
 15.70,   1.57E-007, 
 15.80,   1.84E-007, 
 15.90,   1.96E-007, 
 16.00,   1.95E-007, 
 16.10,   1.66E-007, 
 16.20,   1.00E-007, 
 16.30,   4.00E-008, 
 16.40,   6.48E-008, 
 16.50,   5.41E-007, 
 16.60,   1.52E-006, 
 16.70,   1.88E-006, 
 16.80,   2.10E-006, 
 16.90,   2.17E-006, 
 17.00,   2.14E-006, 
 17.10,   1.78E-006, 
 17.20,   7.79E-007, 
 17.30,   1.21E-007, 
 17.40,   3.13E-007, 
 17.50,   2.43E-006, 
 17.60,   6.52E-006, 
 17.70,   8.33E-006, 
 17.80,   9.18E-006, 
 17.90,   9.38E-006, 
 18.00,   9.27E-006, 
 18.10,   7.83E-006, 
 18.20,   2.62E-006, 
 18.30,   7.79E-008, 
 18.40,   2.34E-008, 
 18.50,   1.53E-008, 
 18.60,   2.54E-008, 
 18.70,   4.37E-008, 
 18.80,   5.55E-008, 
 18.90,   6.27E-008, 
 19.00,   6.54E-008, 
 19.10,   6.02E-008, 
 19.20,   4.50E-008, 
 19.30,   1.84E-008, 
 19.40,   9.54E-009, 
 19.50,   6.70E-009, 
 19.60,   8.21E-009, 
 19.70,   1.20E-008, 
 19.80,   1.54E-008, 
 19.90,   1.76E-008, 
 20.00,   1.90E-008, 
 20.10,   1.85E-008, 
 20.20,   1.54E-008, 
 20.30,   8.53E-009, 
 20.40,   4.90E-009, 
 20.50,   3.04E-009, 
 20.60,   1.99E-009, 
 20.70,   1.39E-009, 
 20.80,   9.90E-010, 
 20.90,   6.37E-010, 
 21.00,   3.70E-010, 
 21.10,   1.70E-010, 
 21.20,   3.94E-011, 
 21.30,   1.97E-012, 
 21.40,  -9.47E-011, 
 21.50,  -8.97E-011, 
 21.60,   1.74E-010, 
 21.70,   4.18E-010, 
 21.80,   7.38E-010, 
 21.90,   9.14E-010, 
 22.00,   1.04E-009, 
 22.10,   1.03E-009, 
 22.20,   8.56E-010, 
 22.30,   4.96E-010, 
 22.40,   3.30E-010, 
 22.50,   2.78E-010, 
 22.60,   5.33E-011, 
 22.70,   5.82E-011, 
 22.80,   3.45E-011, 
 22.90,  -1.24E-010, 
 23.00,  -2.11E-010, 
 23.10,  -1.58E-010, 
 23.20,  -2.33E-010, 
 23.30,  -1.80E-010, 
 23.40,  -1.07E-010, 
 23.50,  -8.58E-011, 
 23.60,  -2.54E-010, 
 23.70,  -1.68E-010, 
 23.80,  -1.21E-010, 
 23.90,  -7.30E-011, 
 24.00,  -1.06E-010, 
 24.10,  -5.52E-011, 
 24.20,  -1.38E-010, 
 24.30,  -1.40E-010, 
 24.40,  -1.40E-010, 
 24.50,  -1.32E-010, 
 24.60,  -1.60E-010, 
 24.70,  -1.32E-010, 
 24.80,  -2.17E-011, 
 24.90,   1.75E-010, 
 25.00,   2.11E-010, 
 25.10,   2.06E-010, 
 25.20,   1.76E-010, 
 25.30,   1.42E-010, 
 25.40,   5.52E-011, 
 25.50,   1.47E-010, 
 25.60,   4.97E-010, 
 25.70,   9.56E-010, 
 25.80,   1.31E-009, 
 25.90,   1.66E-009, 
 26.00,   1.84E-009, 
 26.10,   1.81E-009, 
 26.20,   1.58E-009, 
 26.30,   1.07E-009, 
 26.40,   7.45E-010, 
 26.50,   8.75E-010, 
 26.60,   1.50E-009, 
 26.70,   2.43E-009, 
 26.80,   3.37E-009, 
 26.90,   3.81E-009, 
 27.00,   4.16E-009, 
 27.10,   4.41E-009, 
 27.20,   4.14E-009, 
 27.30,   3.86E-009, 
 27.40,   6.14E-009, 
 27.50,   2.63E-008, 
 27.60,   9.66E-008, 
 27.70,   1.62E-007, 
 27.80,   1.87E-007, 
 27.90,   1.75E-007, 
 28.00,   1.67E-007, 
 28.10,   1.51E-007, 
 28.20,   7.14E-008, 
 28.30,   2.16E-008, 
 28.40,   1.11E-008, 
 28.50,   7.74E-009, 
 28.60,   8.19E-009, 
 28.70,   1.00E-008,

... 714 more lines ...

817

Monday, December 08, 2014, 13:52

Fixed - Not able to start water system

Anders Mjos wrote:

TCS:WPV1 does not open when staging is enabled. Multiple attempts have been made, but the valve remains closed.

Dave Morris looked at the PLC controls and found that the code was not writing to the output after the PLC migration. He corrected it.

818

Monday, December 08, 2014, 15:22

Monday, December 08, 2014, 14:00: Dan M and Anders connected the water supply to circuit D and installed the module cover.

Monday, December 08, 2014, 14:50: Circulating water on circuit D. IG1 vacuum stable at 3.1E-7 T. No response on mass 18 on RGA

Monday, December 08, 2014, 15:30: Test TGHT and TBHT PS. Can be switched on, but set points need to be corrected.

Monday, December 08, 2014, 16:11: Started CHILLCP2

Monday, December 08, 2014, 16:26: Stopped CHILLCP2

Tuesday, December 09, 2014, 09:02: Started CHILLCP1. TS5 at 31.5 C

Tuesday, December 09, 2014, 09:33: Stopped CHILLCP1. TS5 at 17. 1 C

Tuesday, December 09, 2014, 14:54: Tested TGHT to 600 A and 2.05 V (local read back). EPICS read back and set point is not correct. Circuit resistance ~ 3.4 mOhm.

Tuesday, December 09, 2014, 15:14: Tested TBHT to 272 A and 0.97 V (local read back). EPICS read back and set point is not correct. Circuit resistance ~ 3.6 mOhm.

Tuesday, December 09, 2014, 16:01: TGHT and TBHT switched off.

Wednesday, December 10, 2014, 08:30: TGHT and TBHT power supplies cannot be run with TS5 > 25. Bypasses/Forces not implemented. Waiting for controls.

Wednesday, December 10, 2014, 10:44: Water is stable on RGA, however N, O and Ar shows repeated short term spikes of ~4x magnitude. Spikes are also visible on IG1

Vacuum stable over night.

Thursday, December 11, 2014, 08:22: Starting CHILLCP3. TS5 at 33.1 C, TBHT at 30.2 C

Thursday, December 11, 2014, 08:58 : Staging enabled

Vacuum stable over night.

Dave M corrected scale of TGHT and TBHT.

TS5 forced

Lost water in expansion tank over the weekend. See other e-log entries regarding the water leak and fix. Vacuum stable over the weekend.

Monday, December 15, 2014, 13:49: TGHT and TBHT PS at 600 A and 270 A

Monday, December 15, 2014, 14:06: TGHT to 700 A

Monday, December 15, 2014, 18:03: Autoramping down at 5 A/15 s

Monday, December 15, 2014, 18:26: TGHT and TBHT at 0 A. TS5 is at 35 C

Vacuum stable over night

Tuesday, December 16, 2014, 08:07: TGHT and TBHT to 700 A and 270 A

Tuesday, December 16, 2014, 09:00: Stopped MP2. MP3 tripped. TGHT and TBHT tripped.

Tuesday, December 16, 2014, 09:05: started MP2, TGHT and TBHT

Tuesday, December 16, 2014, 16:21: TGHT to 600 A. Will leave both TGHT and TBHT on over night to keep the water warm.

Vacuum stable over night. TS5 at 37.5 C TBHT return at 34.5 C

Wednesday, December 17, 2014, 08:15: TGHT to 750 A

Wednesday, December 17, 2014, 08:35 : TGHT to 800 A

Wednesday, December 17, 2014, 16:09 : TGHT to 700 A. TS5 at 40 C TBHT return at 37 C

Vacuum stable over night. TS5 at 39.3 C and TBHT return at 36.2 C

Thursday, December 18, 2014, 07:54: Starting CHILLCP1

Thursday, December 18, 2014, 08:34: Stopped cHILLCP1 TS5 at 20 C

Thursday, December 18, 2014, 09:07: TGHT to 800 A

Thursday, December 18, 2014, 16:10: TGHT to 700 A

Vacuum stable over night. TS5 at 39.0 C and TBHT return at 35.9 C

Friday, December 19, 2014, 08:17: TGHT to 800 A

Friday, December 19, 2014, 11:54: TGHT to 650 A. TS5 at 39.9 C

Vacuum stable over the weekend. TS5 at 38.4 C and TBHT return at 35.4 C

Monday, December 22, 2014, 08:31 : Started CHILLCP3

Monday, December 22, 2014, 09:30: Stopped CHILLCP3

Monday, December 22, 2014, 10:08: TGHT to 800 A

Monday, December 22, 2014, 16:25: TGHT to 700 A

Vacuum stable over night. TS5 at 38.4 C and TBHT return at 35.3 C

Tuesday, December 23, 2014, 08:16: TGHT to 800 A

Tuesday, December 23, 2014, 13:10 : Starting CHILLCP3. TS5 at 39.5 C and TBHT return at 36.4 C

Tuesday, December 23, 2014, 13:14: TGHT and TBHt to 0 and off.

Leak check found no leaks on Service Cap

Tuesday, December 23, 2014, 14:14 : Stopped CHILLCP3

Tuesday, December 23, 2014, 14:20: RGA filament off

Tuesday, December 23, 2014, 14:23: Stopped MP2 and MP3

Attachment 1: TCS_Heater_Transmission_Power.xlsx

Attachment 2: Circuit_D_test_results_for_TM2_status_meeting_2014-12-11.pdf

Attachment 3: Heated_water_leak_test_plan.pdf

Attachment 4: Heated_water_leak_test_Circuit_D_RESULTS.docx

819

Monday, December 15, 2014, 08:50

TK2 level below 15 in (secondary loop)

The level dropped below 15 in over the weekend. MP2 stopped, but MP3 condtinued pumping.

820

Monday, December 15, 2014, 09:41

Water leak found at the isolation transforer

Anders Mjos wrote:

The level dropped below 15 in over the weekend. MP2 stopped, but MP3 condtinued pumping.

e-fault submitted and Niel Wong has been contacted.

Niel Wong came and had a look at the system. We decided to close the circuit as the water is no longer used with the new power supplies. The circuit will be monitored, but not repaired unless it is needed again.

821

Monday, December 15, 2014, 12:53

Anders Mjos wrote:

Anders Mjos wrote:

The level dropped below 15 in over the weekend. MP2 stopped, but MP3 condtinued pumping.

e-fault submitted and Niel Wong has been contacted.

Niel Wong came and had a look at the system. We decided to close the circuit as the water is no longer used with the new power supplies. The circuit will be monitored, but not repaired unless it is needed again.

Due to the water leak, the expansion tank needed topping up. It was filled from 14 in to 20 in. See work permit I2014-12-15-2.

822

Monday, December 15, 2014, 13:25

BIASSW1 temperature and flow removed from interlock chain

The valved off water circuit has been valved off and TCS:WFB2:BIASSW1 and TCS:TCM2:BIASSW1 have been removed from the power supply interlock chain by Dave Morris.

823

Monday, December 15, 2014, 15:55

Grant Minor

Conditioning Station

Repair

Access to ISAC TCS TK2 Expansion Tank - Fall Arrest

Hello all,

Access was required this morning to the TCS TK2 Expansion Tank to open a valve and re-fill the tank.

As the access path to this tank lacked any form of Fall Protection, Fall Arrest was employed.

Worksafe BC Part 11 Section 11.2 requires fall protection to be employed at elevations greater than 3 meters. The expansion tank is located at an elevation far exceeding this regulation.
http://www2.worksafebc.com/publications/ohsregulation/part11.asp

The worker, Allon Messenberg, was fitted with a harness, personal self-retracting lifeline / lanyard with shock-pack, and carried two steel rope ring-ended slings with him to tie off to the structural beams overhead. All products used were DBI-Sala safety products, which are kept in the Remote Handling machine shop Fall Protection Equipment lockers. Several RH group members have keys to this locker, including me.

Three configurations were required to gain access to the tank (photo attached):
Configuration 1: Traversing the section between the 2nd floor offices and the ventilation duct.
Configuration 2: Traversing the section between the ventilation duct and the "cross point" of the structural beams.
Configuration 3: Tied-off to the "cross point" of the structural beams and working within the reach limits of the personal SRL and shock-pack.

Transitions between the three configurations required brief moments of un-clipping from the harnesses. This will be solved in the future via the use of additional carabiners and lanyards.

Operations has advised me that they have observed either TRIUMF workers or contractors working in this area without wearing Fall Arrest equipment. My request is for staff and operations to stay vigilant in observing access to this area.

Any work performed in this area without the usage of fall arrest must be reported in an NCR.

I welcome any comments from those who have ideas for improving the safe method of access to this tank.

The cooling package is described in the TCS operating manual, Document-103881. Page 8 states clearly that Fall Arrest is required to access this valve.

Regards,

Grant