A safety depressurization system is provided on some designs where it is simple and economic to do so Blow down into pressure suppression tanks is employed in SPWR and SIR

The integral water-cooled reactor with the pressurizer inside the pressure vessel gives a more direct and efficient connection between the pressure vessel and the emergency relief valves than in present generation reactors where the pressurizer and relief valves are separated by piping

VPBER-600 has an additional possibility of a partial depressurization which operates when the gravity boron injection tanks are discharged by connection to the pressurizer steam space

Depressurization is also achieved through the heat exchangers or steam generators used for decay heat removal There are other depressurization systems such as spray which are under operator control