SAN FRANCISCO -- Here's the crazy thing about the plan to build an almost mile long, 90-foot deep, subterranean ice wall around the Fukushima nuclear plant: It's not really very crazy at all.

The proposed ice wall around Fukushima (TEPCO) Here's the crazy thing about the plan to build an almost mile long, 90-foot deep, subterranean ice wall around the Fukushima nuclear plant : It's not ...

Workers are building an underground ice wall around the damaged nuclear reactors at Fukushima Daiichi. The wall is the latest attempt to try to keep radioactive water from leaking out of the plant.

The ice wall would freeze the ground to a depth of up to 30 meters (100 feet) through a system of pipes carrying a coolant as cold as minus 40 degrees Celsius (minus 40 Fahrenheit).

Charles Graebner and Elizabeth Erbes build the ice wall every year. This year, thanks to the cold weather, the wall is now 20 feet long.

Here's the crazy thing about the plan to build an almost mile long, 90-foot deep, subterranean ice wall around the Fukushima nuclear plant: It's not really very crazy at all.Building cryogenic ...