Solar power isn't available 24 hours per day so the LCOE (levelized cost of energy) for solar is claimed be be between $59 to $91 per MWh, see [1], lets say $75/MWh, already higher than the article's $60/MWh cost for nuclear.

However, nuclear power is available 24 hours a day every day, rain or shine, summer or winter. To reach this level of availability a PV system would need to have battery back up. Let's be conservative and say 10 hours of battery is enough. This won't be enough during a hurricane or harsh winter weather with no sun for days, but let's assume 10 hours of battery is enough.

Now how much does the PV system's battery cost? I don't have figures for a 10 hour battery system. I do have an estimate based on a review of research literature for 6 hours of battery storage. According to [2], a 6 hour system in 2030 may cost under $180/Kwh. However, we've been talking Mwh not Kwh so this is $180,000/Mwh.

Unless you don't care about electricity when the sun isn't shining, nuclear is much cheaper.

[1] https://www.statista.com/statistics/493797/estimated-leveliz...

[2] https://www.nrel.gov/docs/fy21osti/79236.pdf