![]() ![]() There are two types of light-water reactors operating in America. This means they use normal water as both a coolant and neutron moderator. Hiroshima was attacked by a uranium-based weapon, and an attack by Iran would be similar to this scale, not the. Nuclear bombs involve the forces strong and weak that hold the nucleus of an atom together, especially atoms with unstable nuclei. This illustration shows nuclear fission of uranium-235. However, the mechanics and sequence of the two processes are fairly different. In both cases, chromosomes are copied and separated, and the cell divides its cytoplasm to form two new cells. Types of Light-water Reactors in the United StatesĪll commercial nuclear reactors in the United States are light-water reactors. While both process deal with changing the nucleus of atoms, fusion the joining of atoms is a different process than fission, which involves splitting atoms. This means that one fusion missile is 300-1000x more powerful than a fission bomb. Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. Bacterial binary fission is similar in some ways to the mitosis that happens in humans and other eukaryotes. The heat created by fission turns the water into steam, which spins a turbine to produce carbon-free electricity. The moderator helps slow down the neutrons produced by fission to sustain the chain reaction.Ĭontrol rods can then be inserted into the reactor core to reduce the reaction rate or withdrawn to increase it. Inside the reactor vessel, the fuel rods are immersed in water which acts as both a coolant and moderator. A reactor core is typically made up of a couple hundred assemblies, depending on power level. Typically, more than 200 of these rods are bundled together to form a fuel assembly. The uranium is processed into small ceramic pellets and stacked together into sealed metal tubes called fuel rods. ![]()
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