First of all, Chernobyl Exclusion zone is about 1000 mile^2. [3] Life is not doing just fine there. And the effect of Fukushima meltdown are not going to be known for the next few years, but there are indications that it may not be as harmless as we are led to believe.[4]
There are currently 62 commercially operating nuclear power plants with 100 nuclear reactors in 31 states in the United States. [1]
A recent study led by European researchers found Fukushima is not alone, as 22 other plants around the world may be similarly susceptible to destructive tsunami waves, with most of them in east and southeast regions of Asia. [2]
The World Nuclear Association estimates that 20 percent of nuclear reactors worldwide operate in areas vulnerable to earthquakes.[5]
[1] http://www.eia.gov/tools/faqs/faq.cfm?id=207&t=3 [2] http://news.discovery.com/earth/plants/nuclear-plants-at-tsu... [3] https://en.wikipedia.org/wiki/Chernobyl_Nuclear_Power_Plant_... [4]http://fukushima-diary.com/2014/07/nuclear-expert-fukushima-... [5]http://www.frontiergroup.org/blogs/blog/fg/how-many-us-nucle...