SECTION 6, CHAPTER 0: THE ROLE OF SAFETY ASSESSMENT …

The confinement is designed to filter any release from the PPB for a range of accidents involving small PPB leaks, and for a larger set of leaks, is designed to operate a rupture disk to limit confinement pressures during PPB depressurization and to re-close a damper valve to limit the rate of egress of any fission products subsequently ... ................
................