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Message ID: 626     Entry time: Wednesday, March 19, 2014, 16:48
Author: Keith C Ng 
Category: ITE 
Type: Repair 
Module:  
Target/Number:  
Subject: 2a3 window - beam tube removal 

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.

 20140319_2a3window_IMG_0813.JPG20140319_2a3window_IMG_0815.JPG20140319_2a3window_IMG_0814.JPG20140319_2a3window_IMG_0819.JPG

 

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.

20140319_2a3window_IMG_0823.JPG20140319_2a3window_IMG_0824.JPG20140319_2a3window_IMG_0828.JPG20140319_2a3window_IMG_0829.JPG

 

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.

20140319_2a3window_RHB_6711.JPG20140319_2a3window_IMG_0834.JPG20140319_2a3window_IMG_0843.JPG

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