Expensive compared to what? It’s only expensive if you ignore the negative externalities of literally everything else.
Nuclear power is only cheap if you ignore that in essence, the whole society is carrying the risk of almost anything that goes wrong. A nuclear power company can't insure any of those risks and certainly can't pay the damages.
Also hidden in those cost estimates is that you need a highly specialized labor force that is hard to ramp up and ramp down, and the field isn't exactly trendy. France is having a huge issue with that right now.
I'm quite worried about China in general. Their inability to regulate various sectors doesn't bode well for their future nuclear safety record. You also wouldn't know anything about Chinese nuclear incidents unless it's absolutely unignoreable.