See mp3 audio interview below.
The ice wall containment method has never been used on such a scale before. The ice wall would freeze the ground to a depth of some 90 feet (27 meters) through a system of pipes designed to carry a coolant between minus 20 to 40 degrees Fahrenheit. The U. S. Department of Energy's former site at the Oak Ridge National Laboratory in Tennessee used an ice wall to contain plutonium waste, but only for six years. Building a nearly mile long ice wall around four nuclear reactor buildings is unprecedented.
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