From a reliability engineering standpoint, I find the concept of storing nuclear waste somewhere and expecting the containment module to not eventually fail in some way without routine human checkups extremely laughable. There is nothing on this earth that can be designed with high certainty which won't fail well before the projected lifetimes required of most nuclear radioactive byproducts.
An interesting field of research would be discovering some new way to safely eliminate the radioactivity of the nuclear waste on a industrially-large scale.
When it comes to nuclear waste, people literally have trouble fathoming how long it will last. For most people, anything past one lifetime is hard to connect with on a personal level; so they feel detached.