the emergency core cooling (eccs) is performed by a redundant high-pressure safety injection system with a total of three strands (one in the nano). the two steam generators are provided with water by two main feeding pumps. if they fail, feeding is taken over by one of the security systems: a double-stranded auxiliary feedwater system or one of the two emergency feedwater systems, one of which part of the bunkerised nano. finally, in case of problems with the cooling, two containment spray systems are entrusted with the removal of excessive heat and pressure by condensation of the resulting steam.