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Heat is produced in a nuclear reactor when neutrons strike Uranium atoms causing them to fission in a continuous chain reaction. Control elements, which are made of materials that absorb neutrons, are placed among the fuel assemblies. When the control elements, or control rods as they are often called, are pulled out of the core, more neutrons are available and the chain reaction speeds up, producing more heat. When they are inserted into the core, more neutrons are absorbed, and the chain reaction slows or stops, reducing the heat.
Reactors can be used for research or for power production. A research reactor is designed to produce various beams of radiation for experimental application; the heat produced is a waste product and is dissipated as efficiently as possible. In a power reactor the heat produced is of primary importance for use in driving conventional heat engines; the beams of radiation are controlled by shielding.
Research and test reactors -- also called "non-power"......
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Title: Reactors
Approximate Word Count: 595
Approximate Pages: 3 (250 words per double-spaced page)
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Reactors
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... Fission can take place in many different kinds of atoms. This explanation uses
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Nuke Power
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Uranium - 235, the atom most commonly used in nuclear reactors. ... ... -
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... Nuclear Reactors Are Not Practical At present there are 442 nuclear reactors
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