Re:Shutting down nuclear power could increase air pollution:...
by hoseja on Tuesday April 11, 2023 @07:46AM
(#35523734)
There are actually only 21 isotopes with "tens or hundreds of millennia" half-life listed on Wikipedia: https://en.wikipedia.org/wiki/List_of_radioactive_nuclides_b...
The longer the half-life, the less radioactive something is. By definition.
Something with a half-life of "tens or hundreds of millenia" is not very radioactive.
Something with a half-life of infinity is not radioactive at all.
The really dangerous stuff tends to be isotopes like iodine-131 (half-life 8 days, accumulates in the thyroid gland), strontium-90 (half-life of about 29 years, accumulates in the bones).