Lec 8 chem 6c

Lec 8 chem 6c - Review Thermodynamic Stability and The...

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Review Fission Subcritical, Critical and Supercritical (Atom-Bomb) Biological damage induced by radiation Thermodynamic Stability and The Theory of Relativity
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n n p p n p p n The He 2+ ion is lower in energy (has less mass) than its individual nucleons. E = mc 2
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n 235 U 92 FP FP' n n slow neutron 235 U 92 FP FP' n n 235 U 92 FP FP' n n + Energy + Energy + Energy ect. ect. ect. ect. Nuclear chain reaction The energy is from the products banging into molecules producing heat
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Subcritical Critical Supercritical Summary…
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Preview The inner workings of San Onofre Three Mile Island and Chernobyl Fusion (the energy of the Sun)
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The inside a nuclear reactor CERENKOV RADIATION
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Also known as a Light-water reactor (LWR) San Onofre: Pressurized Water Reactor (PWR)
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n 235 U 92 FP FP' n n slow neutron + Energy = 2.1 x 10 13 J / mol Fission product Recall that the reaction occurring is as follows:
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The water acts as a moderator which slows down the emitted neutrons so that the uranium fuel can capture them more efficiently. Uranium Fuel Control Rods Water
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The control rods are made from either cadmium or beryllium, both of which serve to quench neutrons to prevent the nuclear process from going too fast. Think of the control rods as a brake pedal used as your car is going down a hill
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Uranium Fuel Control Rods Water The lower the control rods, the more neutrons that are blocked, and consequently less energy is produced. Lowered control rods Low energy production
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Control Rods Water As the control rods are raised, more energy is produced. The control rods are also raised as the fuel is used up to maintain a constant energy production. Raised control rods
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This note was uploaded on 03/21/2009 for the course CHEM 6C taught by Professor Hoeger during the Spring '08 term at UCSD.

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Lec 8 chem 6c - Review Thermodynamic Stability and The...

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