Because it’s not a solved problem and people saying so are repeating propaganda

In many cases disposing of it isn't really a good idea as we can reuse the fuel in the future.

Thus spake the fossil fuel lobby.

please spare us from this nonsense. Waste can be stored in facilities like Onkalo just like we do for many others type of waste, for example in Herfa Neurode

I don't think people appreciate how much power comes from such a small amount of waste. The largest plant near me has been operating for > 50 years and the waste is still kept on site though I believe they are working on another solution.

Most plants don't need anything special for waste management. They just put it in dry cask storage and leave those in the outside.

Ironically, there's less background radiation around the casks than away from them, since they are so shielded you also get shielded from part of the background radiation too.

In Netherlands there is a nuclear energy museum where you can literally walk around spent fuel casks.

It not like everyone can walk in and out as he wants. But a tour can be arranged in advance. This are controled facilities.

https://prinsfrank.nl/2022/09/12/Visiting-the-only-nuclear-w...