UC#8 has been moved from the south hot cell to the vault storage. It was placed in pail 113 and placed in slot 8A of the vault. The field was 9.2mSv/hr upon removal from the south hot cell.

The Target Assembly was inspected with Chad, Jens Henning and Anders today.

• The Target Container was broken.
• Material was deposited on the Heat Shield around the Target Center Block
• Material was deposited on the IG-LIS source.
• Electrical checks to ground (HS)
  • The Extraction Electrode passed the electrical check at 1000V
  • The Exit Electrode (c) held only 40V at 22 kOhm
  • The IG Electrode 1 (f) held 250V at 390 MOhm
  • The IG Electrode 2 (g) held only 40V at 22 kOhm
• IG 1 and IG 2 both held 250V at 450 MOhm to Exit Electorde (c)
• No spark marks were observed on the 9-pin connector

See photos of the inspection on DocuShare

Targets NiO#1(101), Nb#5(85), TaC#1(92), and ZrC#5(81) have been moved from the storage vault and placed in the mini storage. The F-308 flasks have also been moved in to the target hall as well. The attached are the current statuses of both vaults.

All targets in the mini storage (4) have been moved from there and placed into the F-308s and those have been moved to the mech services room.

ITE entrance module has been moved from the east station to the south east silo.

prep'ed area for work:

- removed shield plug from window clamp area

- inspected clamp from tunnel side and from top of target station: video recorder was not working, will try again tomorrow.

- corrosion seen on beam pipe cradles, see photos. corrosion also seen on beampipe, clamp and vacuum tank. will try to vaccuum loose rust tomorrow.

note: gamma spec of rust, white powder from RPG located in \\trwindata\groups\remote handling\Documents\2014\2A3 Window folder (added pdfs as attachments 2014 mar 4)

Video inspected 2a3 window joint this morning.

Screenshots from video showing debris forming around aluminum cradle and brown/red dust on top of beam pipe.

Inspection video can be seen in its entirety at \\trwindata\groups\remote handling\Videos\2014\2014_2A3window

Cleaned top of the ITE vacuum flange and top of window clamp. Attempted to clean the bellows/beam pipe through the wall, mostly dust and small particles. When cleaning bottom of the wall penetration we picked up a stone/fragment and the vacuum stopped. Appears to be a rock of some kind. 800cpm.

Videos on \\trwindata\groups\remote handling\Videos\2014\2014_2A3window folder, videos 3 and 4.

Continued with vacuuming inside wall penetration to remove debris. Changed filter bag in nilfisk vacuum, left old filter in place however vacuum continues to stall after >5min use. Vacuum gets quite warm before self shutting off. Debris seems to be falling back down on to joint if vacuum is turned off.

Took some screenshots of video showing removed debris and rust(?) on beam pipe. Video located on remote handling group folder.

Will attempt to remove clamp tomorrow.

Today:

1) Vaccumed top and around clamp. Disconnected clamp from flanges and removed from beam line. Currently bagged and stored in metal pail next to target pit area. Clamp is 500 µSv @ 1/2 m.

2) Removed 2A3 window from beam line. Pried apart joint from top of target station using pole tool. Window is 95 mSv o.c. 5000 µSv @ 1/2 m. Currently stored in a metal shield & covered with lead blanket infront of spent target vault.

3) Did preliminary clean of tank side flange with cotton glove. See videos in RH group folder. A mark still remains on flange.

4) Installed dust cover over tank flange.

5) Removed old leaking beam tube + support from wall penetration. Currently stored in 2A tunnel, both pieces are bagged. 500 µSv @1/2m, 12000 µSv o.c. Took 2 vials/samples of the deposits inside the plastic piping surrounding the beam tube supports. Material appears to be crystalline and moist.

Today:

1) Cleaned flange with methanol and cotton glove, appears to be clean.

2) Installed new beam tube and cradle into wall penetration, cradle was setup same as previous cradle (which is now removed). On advancing into position, the flange on the flexible bellows appears to get stuck on the spigot of the fixed tank flange. Removed and measured slot, is undersize (.373-.374), will re-machine slot for spigot.

3) On visual inspection, ITE tank flange appears to be warped in a location consistent with the clamping area of the window clamp. Further investigation is required.

R. Kuramoto and A. Laxdal measured the distance from the 2A tunnel to the tank flange of ITE. The new fabricated beam pipe with bellows was used to gauge the distance to the tank flange; The flange face of the beam tube was butted up to the tank flange and the beam tube was marked at the plane of the wall. A metal rod was used to gauge the distance to the tank face using the same method.

From the inside of the tunnel wall:

- To tank flange: 45 5/16"

- To ITE vacuum tank face: 49"

See attached PDF.

David W. has installed two SST Proteus flow meters, model OV7006FTA32, on ITW Heat Shield and Coil. The flow meters are connected to a power supply and a data logger in the electrical room.

The Heat Shield flow meter has SN 00278112 and is on the Black wire pairs and connected to CH3 & CH4 on the logger.

The Coil flow meter has SN 00278113 and is on the Green wire pairs and connected to CH1 & CH2 on the logger.

The first channel (CH1, CH3) is temperature in degrees Celcius and the second channel (CH2, CH4) is flow rate in liters per minute.

A camera has been placed on the logger.

Flow rates today (2014-04-04):

HS        8.2 - 8.3 lpm
COIL    8.0 - 8.1 lpm

Calibration sheets

UPDATE 2014-04-11: Corrected HS to CH3 & CH4.

Today:

1) Installed new cradle and shortened beam pipe section in wall penetration.

- Removed tank dust cover from flange and cleaned

- Held flange faces together from 2A tunnel side to check alignment, slightly biased to the East axially and a small gap present in the top when resting

2) Prepared new 2A window

- Connected preswaged  (1/2 turn) swagelok nuts to the existing copper lines in the target hall, 1/4 turn from finger tight, 3/4 turns total

- Leak checked cooling lines with pressurized air at 75psi and snoop, no leaks were found at the joint

- Grooves were cleaned and helicoflex delta seals were installed with vacuum grease used in the periphery to hold ring in window, applied at 6 points every 60deg

3) Window installation

- Lowered window into position by cooling lines

- Window located into tank flange first then slid beam pipe towards it, capturing the window with seals

- Lowered clamp into place in hole

4) Clamp installation

- Lowered clamp into access hole and started closing clamp with steel RH drive bar

- torqued to 50 ft-lbs collar gap was still ~8"

- Increased torque to 60 ft-lbs then 70 ft-lbs stopped closing of clamp when the displacement did not change between the stop ring and clamp yoke

- It was decided not to continue to close this clamp, more assessment may be necessary

6) We will attempt to pump on the seal in its current configuration, tools have been removed.

The East Entrance module has been moved from the south west silo to the east target station. The move went well.

I reconnected the entrance module back to the ITE station. All diagnostic cables, turbo- pump, air lines, water lines on ITE entrance module and BL2A3 window are connected back.

Helium leak checked 2a3 window after installing using remote line:

- There was a leak found between the target and entrance module at the target pit, rate of 9E-6 atm-cc/sec.

- One test performed with the remote helium line to the window. There was a response but the leak detector was located above the window access channel, drift cannot be ruled out.

- 3 more tests performed with vacuum group, with leak detector relocated farther away from ITE and isolated with plastic. 2 tests using remote line had no response. One test done with a wand through 2a3 wall penetration had a response of 3.2E-9 atm-cc/sec (not using remote line).

Vacuum group (D. Yosifov) comments that due to the much larger leak at the top of the tank he cannot say with confidence the response seen is a leak at the window (due to leak at top) but if there is, a tolerable leak rate.

The 2A3 window now has a lid, and lift yolk on it and it has been installed in the spent target vault in spot 2A. The lid is a normal unmodified and has no sealant on it.

The entrance module was out a new seal went in and then the entrance module went back, and then TM#3 went back. So all modules are now back in place in the east target station.

All targets in the vault have been assayed and measured. Results will be posted soon.