Levelized cost already takes into account the capacity factor of the sources. On a per-peak watt basis, PV is 10x cheaper than nuclear.
We can look at the cost of providing steady power (synthetic baseload) from renewables + storage. This is the most favorable comparison for nuclear, since any varying demand enables storage to serve double duty (smoothing variations in both supply and demand). For reasonable cost assumptions, particularly for when any nuclear plant started today could come online, renewables beat nuclear. It's important to use more than just batteries for storage; batteries are not well suited to long term storage.