From the 750-page report of the Japanese government it falls into place, that Fukushima is in fact comparable to Chernobyl and it will probably take several decades to get rid of the outcome.
Sources: http://www.taz.de/1/zukunft/umwelt/artikel/1/hundert-jahre-sauber-machen/, http://ecocentric.blogs.time.com/2011/06/08/fukushima-new-report-suggests-fuel-burned-through-vessels/