EPR project – detailed design of HQ and HX buildings and the HB substructures for phase 3 of the Flamanville nuclear power plant
The launch of the construction of the Flamanville 3 EPR was a decisive stage
in the preparation for the replacement of EDF’s nuclear plants, the first of which could be decommissioned around 2020.
Planned to be commissioned in 2012, the EPR will be the first French example of 3rd generation nuclear reactors.
For setec, this detailed design mission allowed us to develop our Ansys –
Armatec computing paths while respecting the ETC-C design codes specific to EDF and the Eurocodes.
Our mission consisted in carrying out seismic studies for each of the three
buildings and, in particular, the incorporation of ground-structure interactions. Simplified mass over height models and 3D shell and beam models integrating the ground-structure interaction were also used.
EDF also asked us to study the effects of heavy loads (concrete shells and overhead crane) falling on the HQA building, in order to ensure that the raft would remain leaktight.


setec carried out the detailed design for the HQ and HX buildings, as well as for the HB building infrastructures.
This mission included:
- 3D dynamic shell and beam calculation models (seismic with ground- structure interactions)
- dimensioning calculations of the structures.
- formwork drawings
-  reinforcement guide drawings
- related calculations and listing of anchorage
This study enabled setec to join the list of EDF approved engineering firms for future missions.



Key figures

Period of services

2007 - under construction

Key challenges

The Armatec programme acts as a post-processor for finite element calculation programmes (no matter what the programme) and takes into consideration all aspects linked to:
- maximum regulation load combinations and maximum levels,
- followed by justifications for the reinforced concrete or prestressed concrete cross-sections
This mission resulted in the development of an in-house version of Armatec adapted to Eurocode 2, especially for checking the opening of cracks.