That's a wild guess. Another pandemic could change the picture over night. The likelihood of pandemics is increasing rapidly, not least due to increased population but also under the shadow of increasing resistance to antibiotics
If a pandemic wipes out so many people that we're plunged back into the dark ages, then frankly any conceivable release of nuclear materials isn't going to be that big of an issue, compared to the daily struggle for survival.
That said the fundimental technology needed for "minimum viable" nuclear waste containment dates back to the Romans (water resistant cement).
In any case the sooner we proceed to start mineralisation in insoluble physical forms and geological storage for nuclear waste, the safer and less technology dependent it will be.
Currently
the fear of nuclear waste drives politically motivated
decisions to do nothing which mean it actually
continues to be stored in more dangerous (and resource/maintainance intensive) forms and places than it could or should be;
that cannot conceivably serve anyone's aims or objectives regarding nuclear power regardless of if they are pro or anti.
They thought that before Chernobyl, which could have been a world changing catastrophe. Do you really thing Chernobyl was the last major nuclear disaster ever to happen?
They (the state apparatus of the USSR) actually knew that the RBMK design used at Chernobyl was inherently unstable from the very beginning, and the whole reason for the test which precipitated the accident was to verify that operators were able to maintain control when it entered an unstable state.
It was intentionally built to a compromised design, without certain control features which were known to be needed to make it inherently safe (which following the accident were quietly retrofitted to other reactors of the type including the three other units at Chernobyl which ran until 2000).
The decision to then classify the design's safety issues as a state secret rather than share them with the safety regulators or the operators who had to run it was grossly negligent in a way I can't even begin to convey in words.
The decision to then do a live test to see if they could control it when it encountered a fault condition which could cause loss of control, by deliberately creating that fault... Was just completely insane.
The whole thing was an accident waiting to happen, and could have been predicted from the start because it was known not to be inherently safe.
I seriously doubt we will ever see anything even close to that level of incompetence, acceptance of intolerable risks, or complete lack of awareness of consequences ever again. Whilst we have seen serious nuclear incidents since then (Fukushima being the next worst) but nothing even comes close to that level of idiocy, or consequences.