The reactor that just kaboomed in Japan (General Electric Mark I)? There are 23 of them in America (not on our side of the country but possibly yours). And it seems there has been concern about their safety for years and years:

The Fukushima Daiichi Unit 1 reactor that exploded on Saturday, March 12, 2011, was a General Electric Mark I reactor. This design has been criticized by nuclear experts and even Nuclear Regulatory Commission staff for decades as being susceptible to explosion and containment failure.
As early as 1972, Dr. Stephen Hanuaer, an Atomic Energy Commission safety official, recommended that the pressure suppression system be discontinued and any further designs not be accepted for construction permits. Shortly thereafter, three General Electric nuclear engineers publicly resigned their prestigious positions citing dangerous shortcomings in the GE design.
I just took another teaspoon of vitamins.