Japan, Fukushima Water release

water. The Alps process removes most of the radioactive isotopes to levels
below international safety guidelines for nuclear plant waste water. But it
cannot remove some, including tritium, a radioactive isotope of hydrogen
that experts say is only harmful to humans in very large doses. The
half-life of tritium – the time needed for one half the atoms of a
radioactive isotope to decay – is 12.3 years. In humans, it has an
estimated biological half-life of seven to 10 days. Environmental groups
like Greenpeace, which opposes nuclear power, say radioactive materials
like carbon-14 that remain in the water can “be easily concentrated in
the food chain”. They allege that accumulated doses over time could
damage DNA, and want to see the water stored until technology is developed
to improve filtration. Local fishing communities worry that years of work
to convince consumers that Fukushima’s seafood is safe will be wiped out
by the release.

Guardian 13th April 2021

https://www.theguardian.com/world/2021/apr/13/everything-you-need-to-know-about-the-plan-to-release-treated-fukushima-water