Power plants are built according to the requirements of their location and history shows we fail in getting all the risk

Not to mention corruption and botching.

Which company would you trust to built and operate these power plants?

Vattenfall, Shell, Siemens, Facebook, Apple?

Besides that something like this https://de.wikipedia.org/wiki/Erdgasleck_in_der_Nordsee could also lead to a tsunami if it caves in.

Considering how many we have there it's not that unlikely:

https://en.wikipedia.org/wiki/List_of_oil_and_gas_fields_of_...

https://en.wikipedia.org/wiki/Laacher_See

Because heavy earthquakes in Germany are unlikely the standards for german nuclear power plants aren't planned to withstand one because the planning is accordingly to the dangers of the location.

And that is the problem. We are building something that has to last decades if not centuries and if we miss something the damage is severe.

For example before satellite imagery ships were built according to the normal distribution of waves which said large waves are rare, freak waves nearly impossible. Stories about freak waves were even often dismissed as exaggeration or sailor's yarn. Nowadays we know freak waves happen a lot more often as we thought and ships are built accordingly but older ships have problems if a freak wave shows up or they simply sink.

There is also post-glacial rebound in northern Germany with several fault lines, one of them roughly between Kiel and Lübeck. Where parts of Denmark, Sweden and Norway still slowly rise, while the outer parts bordering Northern Germany slowly sink, 'scratching' against it.

Also several large salt domes, producing sink holes which can be seen as lakes today. Interestingly, some of these are being explored today as energy storage solution, what could possibly go wrong?

edit: Besides that, flooding. Again and again

https://de.wikipedia.org/wiki/Liste_von_Sturmfluten_an_der_N...

Pick your 'fiction or fantasy' ;->