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7.1 Nonrenewable energy-fossil fuels and 7.2 Nonrenewable energy-nuclear…

- - - - Chain reaction: this fission also releases neutrons, which fly out and cause more nuclei to fissio, those nuclei split too, releasing more energy and more neutrons which go on to split more nuclei
        
        the cascade of fissions can result in a chain reaction that releases enormous amount of heat energy in a short time
        
        the fuel for a nuclear reactor is made from uranium ore which is mined from the earth's crust, uranium is common among rocks and seawater
        
        Nuclear meltdown- a coolant, usually water, circulates through the reactor's core to remove heat and keep the fuel rods and other reactor components from melting and releasing massive amounts of radioactivity into the environment
        
        A containment shell made of thick, steel-reinforced concrete surrounds the reactor core to help keep radioactive materials from escaping into the environment, protect the core from outside threats like hurricanes and attacks.