http://www.eclipseaviation.com/files...hite_Paper.pdf
Good to read this, it really is trying to address the issue of the generation of politically correct Br atoms/free radicals in situ.
But ......PBr3 truly is a nasty and a real issue in terms of long term storage et al, its hydrolysis products eat metals and yes I know its redox really.
It's almost worth considering using liquid elemental bromine instead, properly toxic of course but not as prone to reacting with water if it leaks - just reacting with metals and people I know. My Pat Pending please.
Halons are pussy cats by comparison and far more reliable over time; my Halon extinguisher is still in the kitchen .............
CW