[allovernow]

Storage of spent fuel is almost entirely passive. You're literally burying it in a geologically stable site, where even if the containers completely dissolve it will take hundreds of thousands or millions of years for that waste to even potentially impact the greater environment to any significant degree.

The only conceivable risk is for some future civilization coming across the cache, not knowing what it is, and potentially suffering as a result. Which presumes that such a civilization will have declined substantially in scientific knowledge at which point it is unlikely that such access would even affect more than a small group of future peoples.

The risk is practically non existent, especially when compared to the risk of continuing to ignore nuclear now. This is pure, unsubstantiated fearmongering.