The curiosity problem is the whole problem. The only solution that I can see is to simply provide as much unambiguous information as possible, so that anybody e

The curiosity problem is the whole problem. The only solution that I can see is to simply provide as much unambiguous information as possible, so that anybody encountering the buried waste knows exactly what it is that is buried and has all the information they need to decide for themselves that it is dangerous to proceed further. Of course, then we have the problem of explaining nuclear physics to post-apocalyptic cave people.