My point was that when you calculate the cost/kWh from a nuclear plant, if you then are going to operate than plant only 50% (say) of the time you could otherwise do so, the cost/kWh from that plant goes way up, because those high fixed costs are now amortized over only half the output.

Note that even some of the OPERATING costs of a nuclear plant are fixed. You still need about as many staff to run the plant even if you cycle it up and down.

The renewables will be wind and PV. Biomass uses too much land area, and would likely be reserved for specialty markets like chemical feedstocks and perhaps aviation fuel.