I like nuclear and all, but I don’t think nuclear can fill the same spot as peaker plants. Nuclear usually fills the base load needs on the grid. I don’t believe there’s nuclear with ramp rates capable of competing with a peaking gas turbine.
Energy storage does fill this gap usually. My ideal grid would be a semi-flexible nuclear baseload (+ some ancillary services), renewable “mid-load,” and energy storage peaking (+frequency response, etc.).