Professor David Ruzic, the Abel Bliss Professor of Engineering Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign presented outstanding lectures and descriptions of what high-level radioactive wastes are and where they come from including fission products and trans-uranic elements. How much is produced and exists is explained. Why the plutonium from nuclear wastes will not work in an atomic bomb. How they are stored, where they are stored, and the safety of that storage are discussed. Yucca mountain is shown and described as well as other alternatives such as dray cask storage.
For all of his presentations, see: https://www.youtube.com/@illinoisenergyprof6878