The containment is of the pressure suppression type. This type of containment is appropriate for integrated reactors, because reactors of this type don’t need large containment volumes for accommodating primary circuit equipment. The height and volume of the containment are determined by the requirements posed by refueling operations and not by the need to accommodate operating equipment.

Containment wall acts as heat exchanger for removing decay heat to the ultimate heat sink, which is the atmosphere: after a

LOCA, pressure in the containment rises up, till it reaches design pressure, more than three days after the accident. At this pressure, heat transfer through the containment wall to the atmosphere is enough for preventing further pressure increases.

No specific manufacturing, transport or erection problems related to this component have been identified.

It is not necessary to access the containment during reactor operation: maintenance tasks can be carried out during refueling, as all equipment in the containment is static (no movable parts, apart of a few safety system valves)