This system prevents core uncovery in the case of a LOCA. The system consists of two redundant accumulators with borated water connected to the RPV. The tanks are pressurized, so that during a LOCA, when pressure in the reactor vessel becomes relatively low, rupture disks break and flooding of the RPV starts, preventing core uncovery over a long period. The RHRS is also triggered to help depressurize the primary system when the area of a break is small.

Safety relief valves

Three safety relief valves protect the reactor pressure vessel against over-pressurization in the case of strong differences between core power and the power removed from the RPV. Each valve is capable of 100% of the necessary relief. Blow-down pipes are routed from the safety valves to the suppression pool.

Active safety systems

All safety systems of the CAREM are passive systems. All safety systems are safety grade.

For long term water inventory control and to maintain the reactor in a hot shutdown state, auxiliary active systems are used. These are class III safety grade systems [Ш-4].