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Fanra
Current Version
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\\\"** Fortunately, all of the nastiest stuff will have decayed to background levels after only six, or seven hundred years. The longest lived stuff is barely radioactive (there is an inverse relationship between half-life and radioactivity). If the Romans had nuclear power for a while and buried all of the evidence, the only telltales would be finds of depleted uranium — like at Oklo, careful chemical analysis would reveal the truth, but one of the signs is that it would be less radioactive than expected.\\\"
Since it isn\\\'t true.
Especially, \\\"The longest lived stuff is barely radioactive (there is an inverse relationship between half-life and radioactivity).\\\" Is total crap.
Plutonium, which arguably is the most deadly substance on Earth (the only argument is that I guess the poison Ricin or Botox might be considered more deadly if you managed to get some, but those pretty much have to be given to one person at a time, while Plutonium can just be scattered) has a half life of anywhere from 88 years to 80 million years, depending on the isotope.
The Plutonium part of spent civilian power reactor fuel typically has under 70% Pu-239 (half life of 24,100 years) and around 26% Pu-240 (half life of 6563 years), the rest being made up of other plutonium isotopes,
Since it isn\\\'t true.
Especially, \\\"The longest lived stuff is barely radioactive (there is an inverse relationship between half-life and radioactivity).\\\" Is total crap.
Plutonium, which arguably is the most deadly substance on Earth (the only argument is that I guess the poison Ricin or Botox might be considered more deadly if you managed to get some, but those pretty much have to be given to one person at a time, while Plutonium can just be scattered) has a half life of anywhere from 88 years to 80 million years, depending on the isotope.
The Plutonium part of spent civilian power reactor fuel typically has under 70% Pu-239 (half life of 24,100 years) and around 26% Pu-240 (half life of 6563 years), the rest being made up of other plutonium isotopes,
