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Reports until 06:50, Friday 17 December 2010
H2 INS
corey.gray@LIGO.ORG - posted 06:50, Friday 17 December 2010 (421)
Mid-Y BSC Dome Removed
[Corey, Hugh, Jim, Rodney, Zach]
Received verbal approval of Hazard Analysis at lunchtime on Thursday.  So the big activity of removing the BSC dome commenced in the afternoon.  A few notes:
  • Before lifting the dome from the chamber, the purge air was fully turned on, to help blow any dust from the dome flange area upon initial lifting per Kyle's request.
  • When Dome was lifted via crane, the dome appeared to be stuck to the o-rings because breaking away from the O-ring was a little bit of a "jolting" action.
  • Most of the O-ring was seated in the flange with only a small section being stuck to the Dome.
  • With the "BSC SEI two-zipper Cleanroom Sock Roof" installed on the cleanroom, we were not able to lift the Dome out of the cleanroom through a fully-opened Roof. The hole for the sock was just too small for the dome and its protuberances. So the sock was detached from the cleanroom and lifted out with the dome. The dome was laid down and then the cleanroom sock was re-attached.
Today (Fri) we aim to remove the stack and we'll see if we have time to re-install the dome...all depends on if we can get it done before the 3pm Christmas Party!
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