12 years after a nuclear meltdown at Fukushima, Japan pours treated wastewater from the site into the ocean. Is the plan safe?
Part I
NEWSCAST: Fuel rods are now exposed, and if they stay that way, they could release radioactivity and a disaster of unknown proportions. CHAKRABARTI: That was one Fukushima fisherman, speaking to PBS Newshour. Japan’s government defends the plan, saying they can’t store the treated wastewater any longer. The head of the International Atomic Energy Agency, Rafael Grossi, says the plan meets international safety standards.
The other source of radioactive water is from the groundwater. So during the accident, groundwater on the site became contaminated and the Japanese have been pumping out that contaminated groundwater to prevent it from getting into the sea, and that water also has to be treated and stored. And so they'll be generating water for the coming decades, but at much smaller amounts than in the past and much less radioactive than in the past.
And so things like radioactive cesium, radioactive strontium, plutonium, they all get absorbed in these columns and taken out very efficiently from the wastewater. And what you're left is what's called treated wastewater, which can contains tiny amounts of these other elements because the treatment isn't 100% efficient.
SMITH: Okay. So what the plan for Fukushima and what's already begun is that there will be 22 tera. So we measure radioactivity in a thing called a becquerel. So there'll be 22 terror terabecquerel, that's 22 with 12 zeros after it, of tritium discharged into the Pacific per year.
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