French national power utility EDF awarded the contract for the main work package (design and construction of the buildings to house the new-generation nuclear reactor) to Bouygues Travaux Publics, Quille Construction, and DTP Terrassement who, operating as a consortium, are in charge of civil works.

The complex comprises around ten industrial buildings, including the turbine hall and the reactor containment.

The containment is made of prestressed concrete, with a steel liner to contain leakage.