Why was the EPR in Flamanville arrested for 24 hours?

The EPR nuclear reactor in Flamanville (Manche) was shut down and disconnected from the power grid for more than 24 hours on Friday and Saturday. What's the reason? Answer here.

The EPR nuclear reactor in Flamanville (Manche) was shut down for a few hours, between April 25 and 26, 2025, after the alternator had been activated for protection.

The EPR of Flamanville briefly stopped Friday and Saturday before restarting Admin FCE 26 Apr. 2025 - 21:07 The EPR nuclear reactor in Flamanville (Manche) was briefly shut down and disconnected from the power grid on Friday and Saturday, "following the activation of the alternator's protection mechanisms, without automatic shutdown of the reactor", before being reconnected Saturday at the beginning of the evening, it was learned from EDF.Friday…