The Fukushima tragedy should be carefully analyzed because such cataclysms may pose a threat to other countries as well. For example, there’re dozens of reactors in the USA, whose operating life has already exceeded 30 years. And more than 20 of them have the same design as the reactors at the Fukushima-1 nuclear power plant that were designed by the General Electric Company. The design provided for the possibility of an accident once in a 100 years. However, the reality proves much tougher sometimes, the Editor-In-Chief of the Atomic Strategy Journal Oleg Dvoinikov said in an interview with the Voice of Russia.

"Life shows that every 20 years there’s a big accident, accompanied by a radiation leak, which spreads to other countries. Such are the statistics. Therefore, taking into account the aging of facilities, one can say with absolute certainty that a new tragedy, similar to the one that was mentioned above, may occur in the near future."
[link to english.ruvr.ru]