There never was a good war or a bad peace. ~Ben Franklin
Had the massive 8.9 Richter-scale earthquake that has just savaged Japan hit off the California coast, it could have ripped apart at least four coastal reactors and sent a lethal cloud of radiation across the entire United States. (http://nukefree.org/ace-hoffman-computerized-graphic-what-if-chernobyl-h... )
The two huge reactors each at San Onofre and are not designed to withstand such powerful shocks. All four are extremely close to major faults.
All four reactors are located relatively low to the coast. They are vulnerable to tsunamis like those now expected to hit as many as fifty countries.