Sweden generates 40% of the current power generation from hydro. Adapt that to be more flexible than baseload and Sweden has amazing capabilities to run an entire renewable grid mainly based on wind with a minimal amount of chemical short-term storage.
There are few countries with better opportunities for renewables than Sweden.
We are in a good place, but our hydro is basically maxed out and can not support a future (with higher consumption) no-wind scenario during winter since it does not have enough power for that alone.
Nuclear power is a good idea, but so is wind for Sweden. We already have a lot of wind but high pressure areas with little wind do exist, even in winter. Nuclear looks kind of good from that point of view, but I strongly feel that Sweden is way too small of an actor to buy reactors on her own, and should actually co-order reactors with other countries, getting the costs down (maybe not even costs, but risks. There have been a lots of bankrupted players in nuclear lately).
There are few countries with better opportunities for renewables than Sweden.