2% of Commercial Nuclear Reactors Have Meltdowns

http://kevinmeyerson.wordpress.com/2012/04/25/12-commercial-reactor-meltdowns/

After Fukushima Crisis, Hearing on Nuclear Energy Safety

12 Nuclear Reactors Have Had Meltdowns

http://energy.about.com/od/nuclear/a/12-Nuclear-Reactors-That-Have-Had-Meltdowns.htm