A miniature version of the experimental underground ice wall slated to be built around the stricken reactors at the Fukushima No. 1 power plant was shown to the media Friday.

The government and general contractor Kajima Corp. intend to build a massive frozen wall of dirt around the cracked basements of reactors 1 to 4 to stop groundwater from seeping in and mingling with the tons of radioactive water churned out by their jury-rigged cooling systems each day.

The perimeter of the giant Fukushima freezer is expected to be 1.5 km long.