Renewables can be a complement to other power sources, but to even suggest they can be a "replacement" for nuclear power indicates either naivety or ignorance.
Quantitatively this replacement is already done (renewables produce way more than nuclear) and is running (nuclear produces less and less), right now, nearly everywhere (explore using 'Change country or region'): https://ourworldindata.org/grapher/electricity-fossil-renewa...