I found an interesting thread from 2002, here
http://www.pprune.org/spectators-bal...ther-view.html
In it, NW1 states:
"There are
manufacturer approved procedures to increase fuel loading to above the
nominal "full" levels. This adds a tiny amount (usually about 12-1500 kgs, or about 1.5% of the total fuel load). It is a documented, tested and
fully approved procedure - the Concorde's fuel tank venting system works as published even when this "extra" fuel is loaded."
That makes me a bit happier about the whole "pressure wave" phenomenon.
Despite searching I can't find anything that gives any real detail on the Concorde fuel system, I'd like to know how the switch selections affect the configuration of the transfer pumps, fuel galleries and valves and how they were normally configured. If anyone knows of a good reference, please let me know.