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Just to give you an idea: 400 MW wind plant occupies ~70 km2.
To replace the current 7 GW from nuclear you'd need 17 such wind farms... except wind works at 30% on average due to intermittency, so you need 3x that which would require 3675 km2 so roughly area of 61x61 km2 of nothing but wind farms.
And then you would need some kind of storage (not yet existent).