Japan intends to move forward with an ambitious plan to freeze the ground around its damaged Fukushima nuclear plant, creating a so-called underground ice wall to prevent water thats been contaminated with radioactive materials from escaping and entering the broader water supply. Japan adopted the plan in September of last year, and the AFP reports that its nuclear regulator has now approved it, with construction scheduled to start next month. Experts are still questioning whether an ice wall will actually workThe project intends to freeze the ground around four reactors, as well as other related buildings, at Fukushima down to a depth of nearly 100 feet. The AFP reports that some aspects of the plan may still be subject to approval by Fukushima plant operator Tokyo Electric Power Co (TEPCO).