“Back in the 1990s, European nuclear reprocessor sea discharged radioactivity was identified off north-east Alaska, making its way through the Arctic towards the Pacific Ocean,” said Deere Jones.

Source: https://www.greenleft.org.au/content/pacific-fisherfolk-and-environmentalists-oppose-japans-fukushima-radioactive-waste-dumping

High levels of radioactivity (>5,000 cps*) were reported in drill holes AK23-112 and AK23-116.

Source: https://investingnews.com/baselode-confirms-second-shallow-zone-of-uranium-mineralization-starting-32-metres-from-surface-within-ackio/

Its radioactivity is extremely weak: it emits a very short-range beta electron and itself then changes into Helium-3.

Source: https://www.counterpunch.org/2023/08/25/is-the-release-of-radioactive-contaminated-water-from-the-fukushima-nuclear-site-to-the-sea-acceptable-is-it-safe/

That limit is six times less than the World Health Organization's limit for drinking water, which is at 10,000 Bq/L, a measure of radioactivity.

Source: https://japantoday.com/category/national/iaea-wraps-up-safety-review-of-fukushima-treated-water-discharge

“The more neutrons that are leaked, the greater the amount of radioactivity created by the activation process of neutrons,” Ewing said.

Source: https://njtoday.news/2023/02/13/radioactive-nuclear-waste-is-a-problem-plaguing-americas-future-energy-needs/