Given that the US has only 1 reactor that was commercially put into operation after 1990s [1], it's a pretty realistic way to look at it in the US.

Newer reactors and spent fuel reprocessing are definitely ways to solve the issue, but the fact is you still create those nasty byproducts in the traditional reactors today.

[1]: https://en.wikipedia.org/wiki/Nuclear_power_in_the_United_St...