that an incredibly optimistic outlook, that always been the issue with solar and wind not so predictable. they actually would not throw on another nuclear rod on the Barbie they would just use gas turbines to that. a nuclear power station takes the time to spin up, they are mainly used for base load because they are predictable. Plus there are ways that do not require the turbines to be so that tightly   synchronized you use  AC to DC Coupler  that would isolate the wind farm  from the rest of the grid