The water has been used to cool the melted reactor of the Fukushima Daiichi nuclear power plant, but after filling more than 1000 tanks, storage is expected to reach capacity early next year. Japan has treated the water to the point where officials say it is no longer harmful, and now intend to dilute and release it into the Pacific Ocean.
This is a companion discussion topic for the original entry at https://www.sciencemediacentre.co.nz/2023/06/21/treated-fukushima-nuclear-wastewater-soon-to-be-released-in-the-pacific-smc-briefing/