Nuclear Bomb Reactions

Now a nuclear power plant cant just up and explode killing thousands. They are much different than what goes into the process of the Nuclear Bomb. The way the bombs work is they take a large piece of uranium or plutonium and use fission to turn them into small fragments, that causes the reaction of the huge explosion. But the bombs are very compact so when the neutrons fly around they do not have to go far to hit another fissionable atom. So a nuclear power plant is way to big for all of those reactions to take place. source http://www-formal.stanford.edu/jmc/progress/nuclear-faq.html