Photos: © EDF media library- Alexis Morin -Antoine Soubihou / All rights reserved. Flamanville 3 project, Communication EPR FLAMANVILLE 3 April 2017: The latest news in pictures Reactor building Installation of the vessel closure head. Measuring 5. 7m in diameter and weighing 145 tons, the vessel head was transferred from its storage area and placed on top of the reactor vessel. Reactor building Mission accomplished.