Two questions about the Fukushima Daiichi Nuclear Disaster…

Apparently radioactive water is leaking from the holding tanks at the Fukushima Daiichi Nuclear Power Plant which was damaged by the March 2011 Japanese earthquake and tsunami.

-The operators of the plant have proposed building an ‘ice wall’ to contain the contaminated water leaking from the plant… What are the energy needs to establish and maintain/operate this for the necessary length of time? Will it ultimately consume more energy than Fukushima Daiichi ever produced? There are already so many excellent reasons to reject nuclear energy, is this another mark in the no column?

-Would it be possible to clear some of the radioactive isotopes from the contaminated water with activated charcoal? If so, why not dump some in the holding tanks… at least the water that leaks out will be just the slightest bit less radioactive.