Nucleur isn’t all it’s cracked up to be, maybe it would be economical if we had heavily invested in the tech decades ago. But current plants have major issues, here is a snippet from another article:

The study also questions the reliability of the nuclear fleet, particularly given the dramatically low availability of French power plants this year – nearly half of the 56 nuclear reactors were closed even though the EU was in a complicated period of electricity supply with frequent peaks in the price of electricity above €3/kWh.

The availability of this electrical source is also questioned in view of the increasingly frequent droughts expected in the coming years, causing, in particular, low river flows and therefore associated problems of cooling power plants.

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Study: Why investing in Nucleur is bad for the environment