It also just isn't a lot of waste. It sounds like a lot, but consider that the US produces 100 million tons of coal waste per year (2014). Hell, solar has ~30ktons of waste a year (just PV panels). 11ktons over 60 years just is astronomically tiny. That's 138 tons a year, 150x less than solar and 500000x less than coal. They just don't compare.

Ironically, most waste is radioactive. Obviously not as radioactive or we wouldn’t be having this discussion, but turns out almost everything is at least a bit.