  The beam volume of the Pre-Production Single Spoke Resonator type 2 (ppSSR2)
cryomodule [1] for the Proton Improvement Plan-II (PIP-II) [2] project will be
protected against over-pressurization using a burst disk. This contribution
focuses on the analysis of the relief of such trapped volume during a
catastrophic scenario with multiple systems failures. An analytical model, able
to predict the pressure in the beam volume depending of the various boundary
conditions, has been developed and will be presented along with the results.
