While germany is getting out of nuclear power altogether... their "Energiewende" plan is very ambitious but i wonder if its not better to invest into nuclear power to make it saver instead of getting rid of it completely. I dont know much about it though, what do experts think?
Is that an offer to pay all the external costs of nuclear power? I mean, all of them. From final deposit, over insurance policies in case of a meltdown to environmental consequences of the entire nuclear supply chain? Nuclear power is just too expensive for an economy. Nuclear power is limited, there is just not endless amount of uranium on the planet. Also globally nuclear power is pointless, IIRC nuclear power has…
A finite quantity can be quite large. Uranium is not that scarce even with a ramp up of nuclear activity. And even then, there is thorium, a more abundant fuel.
"you can't usually use the heat an nuclear power plant produce for anything productive, so it's lost."
That is a problem with conventional low-temperature high-pressure designs, however LFTR (low-pressure high-temperature) produces high enough temperatures to be usable in industrial processes directly (700C). Designs can be modified to get to 1000C or so which is useful for hydrogen production.
"But of course there are new and better plants in development, they are safer and bigger and produce less waste."
LFTR not only produces less waste, but it can be used to burn existing waste. So if we consider the costs of long term security and storage, just developing LFTR to process waste is going to be worth it.
"Since 2005, there is a nuclear power plant being build in Finland, called Olkiluoto III."
That is indeed a problem with all large industrial/construction projects that need government funding or complex regulatory processes. If you are arguing against nuclear power you should be against all such projects.
One problem with wind power is a poor ability to provide base grid load. Yes, if you have a widely distributed (continent-wide) network things may even out. But then that means you have to waste energy in the transportation network, as well as investing in powerlines. The same argument about inefficiency starts to come up.
The main argument then for wind and solar is that the costs scale linearly with output, whereas for a government-backed power plant the costs tend to escalate (bribes, kickbacks, cost-plus etc). That is acceptable, it just means people can become more independent of the inherently inefficient state-run grid. But with a state-run renewables system you have to contend with a centralized and potentially oversized grid. You trade away centralism in one area (identical turbines or panels) and have to buy it back in another (large scale power distribution system).