nuclear energy is so expensive, take the new plants in the US and france that are being built. 10-20 years in construction, 10x over costs. You can't really build a new nuclear plant in 1-2 years
Germany is in a unique position here, having recently shut down over a dozen nuclear plants. Three months is probably not enough to refuel, restaff and cut through the red tape, but it doesn't have to be decades.
You could take the serially produced reactors that are used in ships. If you pay enough you should get the next batch. If you push it like China pushed its emergency Covid hospital, it should be a matter of months to have some reactors going.
