>>11112981Time-Distance-Shielding
2 inches of lead reduces radiation by a factor of 10.
4 inches of steel also does this.
For a point source, which waste would be, radiation drops by the square of the distance.
Not to mention the actually damaging high energy radiation dissipates quickly. Candle that burns twice as bright burns half as long. So the long term storage concerns are for low energy radiation to begin with.
I have stood atop actual reactors after shutdown because of this issue alone.
Storage is a complete non-issue, especially since the actual volume of waste is a solid metal of which the last 70 years of operation produced waste (that is still 99% useable fuel) that can fit in a single walmart or the 1st floor of the empire state building.
