Lecture_26_Alternative

Lecture_26_Alternative - 1 Final Exam • 4/24 Class:...

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Unformatted text preview: 1 Final Exam • 4/24 Class: Review Q&A • 5/1 8:00 - 10:50 • Covers material since Exam 2 • Bring photo I.D. U.S. only 2 Alternatives to fossil fuels • Nuclear (Fssion) • Nuclear (fusion) • Hydro-electric • Solar • Biofuels • Wind • Geothermal • Ocean thermal • Increased energy use efFciency Hydro-electric power • Convert movement (kinetic) energy of water moving downhill into electricity • Dam - concentrates drop into small area • “Uses” water but doesn’t “consume” it (except by excess evaporative loss) 3 Hydro-electric maximum 4 Nuclear (fssion) energy Fission: Split large atom into smaller ones, releasing energy (heat) and neutrons. Conventional reactors: 235 U (radionuclide) What happens when 235 U decays? • In the environment: 235 U very rare. 235 U decays, neutrons released, absorbed by something else. • In a bomb: Concentrated (>90%) 235 U, 235 U decays, neutron absorbed by another 235 U which then splits, more neutrons released, more fssion (uncontrolled chain reaction). 5 • In a reactor: Diffuse (3.5%) 235 U. 235 U decays. Control rods absorb neutrons....
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This note was uploaded on 02/08/2011 for the course EAS 1601 taught by Professor Lynch during the Spring '08 term at Georgia Tech.

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Lecture_26_Alternative - 1 Final Exam • 4/24 Class:...

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