It's not the most expensive form. Some current builds are expensive, but it generally can provide for very cheap. Check out Goesgen open data for Switzerland
In 2024, the cost for storing nuclear waste just up until 2100 was estimated to be 170 Bln. [1]
This cost is always, without exception, excluded in the calculation of the cost of generating a MWh. It's externalized, paid for by the next generations of taxpayers.
Gösgen's open data, just like all the other data, does not include waste management cost.
Gösgen is a perfect example for how brittle and outdated the technology is. The nuclear plant is off the grid since May 2025 and will remain down until at least February 2026 [2]
Just like the newly-built Flamanville 3 (12 years late, 10+Bln over budget), it's off the grid until further notice. [3]
The world is phasing out nuclear.
[0] https://de.wikipedia.org/wiki/Endlagersuche_in_Deutschland
[1] https://www.zeit.de/wissen/2024-08/atommuell-endlager-suche-...
[2] https://www.schwarzwaelder-bote.de/inhalt.akw-faellt-aus-ker...
[3] https://www.energy-charts.info/charts/power/chart.htm?l=en&c...
2- It's covered by kenfo, auto reinvested fund paid by operators. It has about 24bn. In comparison Onkalo in Finland did cost 1bn to build. A similar repository is built in Sweden in Fosmark
3- Goesgen data does include the tax for both waste handling and decommissioning, didn't you read the data?
4- you don't seem to understand why Goesgen is offline. It's not about being brittle. They installed new equipment that performed too good and they need to upgrade other connected components
5- Flamanville did cost merely ~a single year of German EEG subsidies for renewables
6- 2024 was record TWh from nuclear, for like, ever. It'll grow more, mostly due to Asia unless Hitachi/Whous/EDF will do something