@dalias @dave The disposal part can be relatively-simply addressed on massive sites with on-site deep geological disposal.
That's not an option at small random sites. So already this becomes a large coordinated effort (nevertheless possible without states, yes).
That also precludes the reuse of the "waste" in slightly different reactors, because that waste is most likely not truly waste but simply unfit for that particular reactor design. (Sure, contaminated PPE truly is waste, but I mostly mean the "spent" fuel which isn't really all that spent.)
(This is where the temporary-long-term storage & its safety becomes a problem.)
It also doesn't solve the incoming transport of mass reusable for harmful purpose & its security, though.