"Anything with a half-life that long is, by definition, not that radioactive"
Untrue and/or not applicable, Sir.
"Transuranic wastes, sometimes called TRU, account for most of the radioactive hazard remaining in high-level waste after 1,000 years." [USNCR]
- Decay of the waste fuel mix is a complex process.
- The activity decreases by a factor of 1000...2000 during ~35,000 years.
- But the starting activity is so high (20,000 rem/hour) that ~10 rem/hour is still remains after tens of thousand years.
- By US law, you need 0.2 rem/hour surface activity to declare it "you may handle it by bare hands". By contrast, it will have so high activity that if you keep it
in your hands for a few days, you will probably die from it.
- So yes, fission tech is immoral, it will hurt us even after thousand years, and your grand-grand-grand-grandchildren will blame you too, to be so neglectful.
Sources:
- US Nuclear Regulatory Comission
- Total activity of spent reactor fuel over time
Kill Ugly Processor Architectures - Karl Lehenbauer