France's newest nuclear reactor shuts down automatically after initial startup

France's newest nuclear reactor, the European Pressurised Reactor (EPR) at Flamanville in Normandy, automatically shut down on Wednesday, just after first day of its operation.

The shutdown is part of a "long and complex startup process requiring many trials and tests," which can trigger such automatic shutdowns, a spokeswoman for state-owned energy giant EDF told AFP.

The shutdown "proves the safety system is working well," she added, saying that staff were now "doing the necessary technical checks and analysis... then they will restart the reactor".

EDF's latest reactor, supposed to be the model for a new generation of power plants pushed by President Emmanuel Macron for the coming decades, has been completed 12 years late at a cost of 13.2 billion euros ($14.6 billion) -- around four times the 3.3 billion initially budgeted.

Reactors of the same design have previously been completed in China and Finland.

EDF had on Monday secured approval to begin the fission reaction from France's ASN nuclear safety authority, having loaded uranium fuel into the reactor in May and carried out a battery of tests.

The Flamanville plant will gradually ramp up to 25 percent output before being connected to the grid "by the end of autumn", the power company says -- a further delay from its previous target of the end of summer.

At full power it will be France's top-producing nuclear reactor at 1,600 megawatts, enough to supply around three million homes with electricity.

News.Az