France's 80 years of nuclear waste takes about the space of an Olympic swimming pool and half.
In a millena, it'll be 150 swimming pools, and that's assuming we haven't found a way to repair/reuse/recycle it in 1000 years. Or not decided to just yeet it on the nearest inhospitable planet via railcannon or something.
Nuclear waste is a non issue.
"If it's not an issue, how come we haven't built a thing to solve it"