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Fission • Simple diagram of nuclear fission. In the first frame, a neutron is about to collide with the nucleus of a U-235 atom. In the second frame, the neutron has been absorbed and briefly turned the nucleus into an unstable U-236 atom. In the third frame, the U-236 atom has fissioned, resulting in two fission fragments (Ba-141 and Kr-92), three neutrons, and the release of a relatively large amount of binding energy.
The steam that you see is from the cooling of the water after it cycles through the turbine to generate the electricity. • Nuclear Reactor
Parts of the Reactor • Coolant • Fuel • Moderator • Core • Heavy Water • Control Rods