For what would you need/use the fossile fuel when your heating already is electric?
For heating, cooking etc. Just like the continent. When electricity prices triple (like they will when we reach German levels), then people will of course change their heating systems, as that becomes economically advantageous. We'll go back to (mainly) gas, again, like the rest of the continent/world. Hell, at those prices, we could see people going back to oil, as you could (almost) cover the cost of that. Since most houses have a water borne heating system (i.e. with radiators/in-floor heating) changing to another source is relatively cheap and easy.
I doubt that ... first of all the greens would need a majourity.
American right? In a parliamentary system you don't need a majority to be part of government. It's just a question of how well you negotiate (we don't even have a majority government for that matter). That we're set to close down our nuclear is already a fact. The decisions have already been made, and the laws are there, so there's nothing to argue about there.
And secondly the prices would only rise if the installed power plants would produce the power more expensive or some odd tax scheme would be established. Both is rather unlikely, e.g. fresh installed wind power is already cheaper than nuclear power from ages old reactors.
Nope. Prices are, like everything, a question of supply and demand. That a wind turbine might deliver electricity "cheaper" per kW (which isn't objectively true BTW) is of no consequence if you don't build the thousands upon thousands that are needed to replace just one reactor. Since we have been oversupplied by electricity and hence have been enjoying low prices will of course end. No electricity producer will build a couple of ten thousand extra wind mills just to keep prices low. It doesn't work like that.
Second, changing from wind to nuclear needs a new national grid, as our wind would be preferably put in the north of the country. To replace our southern nuclear generators we would need massive investments in our transmission capacity (conveniently ignored in the "cheaper" argument). Again no-one would do that to even replace current capacity, we're talking about a doubling of transmission capacity. It's gotten to the point that large wind parks in the north are now being blocked, because the transmission capacity to get the power to where anybody would be interested in it, just isn't there.
Again. If electricity prices increased sharply in Germany, and that's ignoring the transmission problems, that are only masked by the rest of Europe (mainly France) covering for the instability of the German grid, why do you think that Sweden could magically avoid the same fate? Especially as our power was markedly cheaper to begin with.