You probably have to look at the whole picture. Having part of the energy generation from nuclear probably makes the total cheaper than having no nuclear. Even if nuclear maybe is the most expensive.

Not having enough energy or having it cut off by a neighbour is very expensive.

That is not the case. Grid modelers always land on renewables being cheaper. Except for the cases when the studies start with "assuming cheap and fast to build nuclear power".

https://www.pv-magazine.com/2026/04/17/new-metric-shows-rene...