Japan's $320 Million Gamble at Fukushima: An Underground Ice Wall
http://www.nytimes.com/2016/08/30/science/fukushima-daiichi-nuclear-plant-cleanup-ice-wall.html?rref=collection%2Fsectioncollection%2Fscience&_r=1
Not really that new of a technology it was used in 1997 at ORNL for the same reason, to prevent the spread of contamination.
On frozen pond
http://knoxblogs.com/atomiccity/2013/09/23/frozen-pond/