Areva has announced that the 1600MW Olkiluoto 3 (OL3) EPR reactor project in Finland met a major milestone with the installation of the fourth and last pump of the primary cooling system and its connection to the auxiliary piping and onsite power system. The completion of this work marks the end of the installation of the reactor’s nuclear steam supply system. Areva said the OL3 project is now more than 80% complete.