This reactor was designed/partially built by Framatome/Areva/EDF/whatever the ownership structure is now after the various Areva scandals. Siemens erected the building. Same design as the Flamanville plant that's still not finished. Two reactors vessels shipped to China also from the same design. Time delays (took over 7 years to construct; original plan was 4), structural issues in the reactor containment vessel during manufacturing due to shoddy work by Areva and substandard alloy quality delivered by the Areva subsidiary.

This is also the nuclear plant (Taishan) that was in the news last year regarding damaged fuel rods.

That's the output from the experts in France so far.

Areva was basically shuttered and written off as a loss during all this. A part of the company only still exists as part of this Finland deal.