It’s done they’ve loaded the fuel in. But you are correct in that there have been lots of problems. Every single nuclear project goes over budget or has complexities. Westinghouse declared bankruptcy over their nuclear project management issues.

France has the most nuclear electricity production relative to their size and is the only western nation (along with the USA) that can make + design their own nuclear propulsion system. The British use an American designed reactors. They have decades of experience in this field. And unlike the Americans they never changed in their political support of nuclear power.

The EPR design is a massive innovation but the teething problems have been huge. The problem with OK3 was the companies that bid for the projects didn’t have the technical ability to execute on it. Siemens even paid back money in a court case.

Westinghouse faced the same problems when they tried to implement their designs they found too much of the supply chain was outsourced and they lost a lot of manufacturing acumen. However the process to reintegrate that knowledge is back but it will take many years and concerted political will.