Japan will start releasing treated and diluted radioactive wastewater from the Fukushima Daiichi nuclear plant into the Pacific Ocean as early as Thursday — a controversial step that the government says is essential for the decades of work needed to shut down the facility that had reactor meltdowns 12 years ago.
It’s been 12 years, 5 months, how much longer are we talking about?
Usually to consider radioactive sources “gone” you have to wait at least 5 half lives (which makes it 99.875% gone), which would be 60 years in this case.