I'll have tyo admit here that I really don't fully understand the jargon.
I surmised that by rotor burst what they were protecting against was any uncontained failure (of any engine part) that might have compromised the integrity of a fuel tank.
That if that were to be presumed that to avoid the Air Transat situation that certain protocols of fuel management would be necessary.
all of the above of course is subject to my own personal confusion about the preceding discussion 