Japan plans to surround the stricken Fukushima nuclear plant with a massive underground wall of frozen soil, thereby preventing contaminated groundwater from flowing into the sea.
The Japanese government unveiled a plan Tuesday to keep radioactive water at the stricken Fukushima Daiichi nuclear plant from contaminating ground water that flows into the sea, in large part by surrounding the plant with an underground wall of frozen soil.
By some accounts, the $470 million plan’s reliance on frozen soil represents a use of the technology on an unprecedented scale.
At the same time, some nuclear-energy analysts suggest, the ad-hoc effort to deal with contaminated water highlights a shortcoming in the industry more broadly.
Much attention had been focused on making sure plenty of water reaches a reactor to keep it cool during an accident, they say, but relatively little thought has been given to how to manage that contaminated water.
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