*****refer to Radioactivity_Sim’s first use: Feasibility of a radiation battery with unprocessed waste for feasibility update on this design concept******
Here is the second part of the Atomic battery idea. Here a spent fuel rod is successively vitrified with transparent and perhaps fluorescent materials and then tiled over with concave solar panels which are then sealed within the waste’s federally mandated containment shell. It is a somewhat more expensive design than just a storage cask, but it will generate predictable amounts of power for a predictably long time, until either the solar cells degrade from radiation damage or the radioactivity level falls significantly. With proper design, the storage unit could supply a modest amount of power for a very very long time.