the power plant is connected through five strands to the external power grid. two of them are mainly used to deliver the power plant output to the 220 kv grid. they are nevertheless equipped with an emergency diesel generator each. two other strands provide emergency power and are connected to the nearby hydroelectric power plant and the 50 kv grid. further, two diesel generators expressly equipped to be able to work in case of accident management are also available. the nano is connected through the fifth strand to the 50 kv grid and contains a fifth generator. the plant main ups system can provide direct current for at least 2 h of normal operation.