Earlier this year, a Constellation-EDF joint venture won permission from the Maryland Public Service Commission to build a third reactor at Calvert Cliffs, based on Areva’s EPR reactor design. (The fate of the Constellation-EDF financial merger should be resolved soon.)
In a rare joint statement, nuclear safety bodies in France, Britain and Finland on Monday ordered France’s Areva (CEPFi.PA) and EDF (EDF.PA) to modify the safety features on its European Pressurised Reactors (EPR) due to insufficient independence between the day-to-day systems and the emergency systems.
Changes to the EPR design mean further delays at construction sites in France and Finland. EDF officials have ordered a speed-up which will only drive costs higher:
The move threatens to boost the €4bn ($6bn) cost of the EPR project in Flamanville, France’s showcase for the new generation nuclear technology that it hopes to export around the world.