Emotions certainly played a major role when Germany decided to phase out nuclear in 2011, and the execution and timeline of that phase-out were poor.
But that doesn't mean Germans haven't pondered seriously about this topic in the meantime. And the result is that, apart from this band-aid solution for the current winter, Germany will still phase out nuclear. Let me try to summarize the most important points I know of:
- Cost. Nuclear energy is expensive energy. It just happened to be cheaper than solar and wind energy a decade ago. But the cost of renewables went down spectacularly, and the cost of nuclear went up at the same time (https://en.wikipedia.org/wiki/Levelized_cost_of_electricity). So why invest in nuclear energy when we could have more low-carbon energy for the same price elsewhere?
- Subsidies. So far, all nuclear power plants have been heavily subsidized. There isn't a single country where the full cost of decommissioning and permanent storage of radioactive material is properly taken into account. And there is no power plant with a full insurance, so those risks are carried by the public. Once we eliminate these subsidies, the cost of nuclear grows even further.
- Reliability. Some people dislike renewables because there are times with no wind and no sunshine. But they forget that wind and sunshine are relatively predictable and have worst-case bounds. So investing into storage and the electricity grid makes renewables highly reliable. Now look at nuclear. The worst case scenario is roughly what just happened in France: you discover a problem that affects an entire generation of power plants, and all of them have to be taken offline until the problem is resolved (https://en.wikipedia.org/wiki/Nuclear_power_in_France#Crisis...). Without its European neighbors, France would be in deep trouble. If we take precautions against this risk, the cost of nuclear grows even further.
- Inflexibility. Nuclear power plants need a high uptime to amortize their construction cost. But once they operate in a grid with a substantial amount of renewables, they are displaced more and more and the cost per unit of energy grows even further.
- War. The Russian army has recently captured a Ukrainian nuclear power plant (https://en.wikipedia.org/wiki/Crisis_at_the_Zaporizhzhia_Nuc...). The plant is now used to store military equipment, the employees are bullied or even tortured, and all pillars of nuclear safety are being violated. There are credible approaches how we can build a power plant that resists human stupidity or a natural disaster, but there is no way we can build a power plant that is unconditionally safe in a war zone.
- Nuclear Proliferation. Once the know-how and the infrastructure for handling fissionable material is in place, even if only for civilian purposes, there is a much stronger incentive to also look into military use. And the last thing our planet needs is more nuclear weapons.
Given these points, the current German position seems quite sensible and I wonder why some other nations are suddenly so eager to build new nuclear power plants.