From: Goranson, Paul L. [goransonpl@ornl.gov]
Sent: Wednesday, April 18, 2007 2:14 PM
To: Lawrence E. Dudek
Cc: Thomas G. Brown
Subject: lateral support pads

Larry,

This a small thing, but important, and one that is liable to fall in a crack, particularly if I am not on the project during the final assembly phase. There is no place to document this since it will be described on the Final Assembly Procedure or final assy drawing neither of which is complete yet.

The lateral supports must have 0.04" of gap or resilence under the G-10 pads( next to VV manned port pads) to take up VV/MC thermal differential growth during operation/bakeout. Athough belleville washers would work, a better material would be 1/8" x 2" x 3" PYROGEL AR5401. It would be precompressed 25% and would be able to compress and take up the thermal movement, while isolating the G-10 pads from the hot VV. I think it could be epoxied onto the G-10 directly.

Figure on ~$25/square foot. This problem was brought up in the CHITS.

Paul