The most expensive serious storage solution is LiIon, and even that's merely the same cost (or at least, the bell curves of their prices mostly overlap) as an equivalent nuclear reactor.
(I'm deliberately ignoring any claims about future battery costs; while I'm expecting them to come down, they don't need to in order to make this argument).
citation needed.
• LCOE for nuclear, analysis based on new nuclear worldwide but priced in Euros, €67-€82/MWh, (2020): https://energy.ec.europa.eu/system/files/2020-10/final_repor... page 40-41
I thought this should be clear to everyone today, when energy price whent up 10x because yoy can print euros but can't print jeoules of energy or natural gas.
Renewables and nuclear use different resources and manufacturing capacities.