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The freeze wall would be a more definitive approach to managing groundwater. As proposed by Kajima in April and endorsed in May by a Nuclear Regulation Authority expert panel, it would run 1.4 kilometers and encircle the site’s four destroyed reactors. Vertical pipes are to be drilled or driven into the ground at one-meter intervals, creating what looks like an array of sub-soil fence posts. Fourteen 400-kilowatt refrigeration plants would pump -20 °C to -40 °C coolant down each pipe to absorb heat from the ground, producing an expanding cylinder of frozen earth.
Do they even have a clue as to the precise position of the core material ?
lol they dont know anything, remember you are talking about the same people that thought it would be a great idea to build a nuclear power plant on an active fault line, on a coast and at sea level. Massive earthquakes and tsunami assault the coast every century, yet these idiots didnt hesitate building nuclear reactors. not too bright there