from Reuters this am:
http://www.reuters.com/article/2011/...7DP00A20110328
Radiation above 1,000 millisieverts per hour was found in surface water in trenches outside the No. 2 reactor of the crippled Fukushima Daiichi nuclear plant, operator Tokyo Electric Power said on Monday. (Reporting by Shinichi Saoshiro)
Dr. Michio Kaku:
http://www.youtube.com/watch?v=haBovPouOU8
To paraphrase:
Radiation at these levels may cause abandonment of the site, leading to three uncontrollable meltdowns. Large areas of Japan would likely become uninhabitable.