In Flamanville, EPR vibrations weigh down EDF

Blast 15th Jan 2025
https://www.blast-info.fr/articles/2025/a-flamanville-les-vibrations-de-lepr-plombent-edf-27fa5zyHQ6mpDzOKgti6kw

Last week, Luc Rémont, CEO of EDF received a worrying report from the engineers working on the Flamanville EPR. It reveals a recurring problem of excessive vibrations. And indicates that he does not know whether the EPR will be able to operate at full power. Revelations.

At EDF, troubles are flying in squadrons. This Tuesday, January 14, the Court of Auditors published a new report on the Flamanville EPR . The venerable institution on Rue Cambon (Paris) now estimates the final cost of the project at 23.7 billion euros. An amount that is significantly higher than the previous assessment made by the Court in 2020: 19.1 billion.

Kicking the donkey, the report specifies that “the calculations made by the Court result in a mediocre profitability for Flamanville 3” : the tiny margin that EDF could generate will not be enough to repay the cost of the loans! For that to happen, the EPR must one day operate at full power. And of that, even the EDF teams are no longer really convinced.

The scene takes place at a dinner party in Paris late last week. “We were in a meeting in the CEO’s office and everything was going well. But then he received a report from Flamanville and the atmosphere suddenly cooled,” says a senior executive of the electrician present at the meeting. If Luc Rémont, the CEO, did not fall off his seat when he read the report, he came close.

The cause? The engineers working on the reactor’s start-up have a doubt. And a big one. “They don’t know if the EPR will be able to operate at full power,” says this senior executive.

This question, which exists among many employees who worked on the nightmarish reactor construction site (twelve years behind schedule), is now shared by the teams who took charge of the reactor. And it is based on an observation: contrary to what EDF’s communication claims, the vibration problems affecting the primary circuit of the reactor are far from being resolved. “The report confirms that there are still problems with excessive vibrations,” says the decidedly very talkative manager.

At the meeting of the local information committee for the Flamanville nuclear power plant in April 2014, held a few days before the ASN authorised EDF to install nuclear fuel in the tank, the electrician had nevertheless brushed aside the issue of vibrations, stating, clearly a little too quickly, that everything was sorted .

But already in the floors of the general management in Paris, the knives are sharpening and the hunt for the culprit is open. Who will wear the hat? One name is on everyone’s mind: that of Alain Morvan , the director of the EPR project until last October, accused in veiled terms of having hidden too much dust under the carpet.

Contacted by email on Tuesday 14 January late in the morning, EDF indicated that it was sticking to its construction cost of 13.2 billion (excluding interim interest). But it refused to comment on our information on the vibrations. Questioned the same day also by email, the Nuclear Safety and Radiation Protection Authority (ASNR), resulting from the merger of the ASN with the IRSN, did not respond to us.