RM; to your question: "OK to treat it like the response we would typically get for a relief valve?"
I say yes; the differences are that:
1) a relief valve will close after some time, while the rupture disc does not.
2) The ramp-up time for the load will be faster in a rupture disc, as the disc will rupture faster than the valve will open.
Other than this, I see no difference from CAESAR's perspective.