Wind power isn't a solution, because the turbines only last a few years and cannot easily be refurbished -
Sorry, but that is simply not true. Modern mass produced windmills (on land) are build to last around 20 years. Off shore ones are targeted at 25-30 years. Both can relatively easily be refurbished (as a mater of fact in Germany quite a few land based wind mills where upgraded to more efficient turbines long before the old ones where use dup, because it made more financial sense). Some earlier, workshop-produced one have lased longer.
and they don't work if there's no wind (like today) or too much wind (like last week). Hydro-electric? Yeah, let's just flood a few thousand square miles of mountain wilderness, that surely won't have *any* ecological impact!
The thing is you need significant backup with nuclear power as well. Electricity consumption varies by more than 50% during a 24 hour cycle. (i.e. if highest demand = 100, lowest demand is 50 or less). Because quite a bit of that is hard to predict (as opposed to the normal variations between day and night, summer and winter etc.) and since nuclear plans tend to be quite slow in regard to varying their output, you need (most gas fuelled) backup any way. Beyond that, there is geographical variance. Yes there might be too little or too much wind in, say, Naples. But generally there will be wind in for example Turin.
No one (well almost no one, there's idiots in every group) that wind should provide 100% of power. But almost any country can use up to 20% without any large modifications to it's network en more depending on other factors (availability of existing Hydro, connectivity to neighbouring countries, number of gas plants etc.) And lets not forget that any new nuclear power plant in Italy wouldn't be online for a decade, maybe longer while new wind turbines can be installed within 2 years (assuming some planning and licensing time).