P3aw E

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P3aw E

  1. 1. Nuclear Energy By Andrew Waller
  2. 2. How it works
  3. 3. Uranium <ul><li>Upon bombardment with slow neutrons, its uranium-235 isotope will most of the time divide into two smaller nuclei, releasing nuclear binding energy </li></ul>
  4. 4. Nuclear Energy <ul><li>Nuclear fission achieved in 1934. </li></ul><ul><li>In 1954 the world's first nuclear. power plant was put on-line. </li></ul><ul><li>In 1979 the accident at Three Mile Island and in 1986 the Chernobyl disaster happened. </li></ul>
  5. 5. Life-cycle <ul><li>Uranium mining </li></ul><ul><li>Enriched </li></ul><ul><li>Delivered </li></ul><ul><li>Reprocessing after use. 95% of spent fuel can be recycled </li></ul>
  6. 6. Water use <ul><li>Over 4 million gallons a day. </li></ul><ul><li>Two-thirds of the energy produced goes into waste heat. </li></ul><ul><li>Droughts can pose a problem by causing the source of cooling water to run out. </li></ul>
  7. 7. Waste <ul><li>25–30 tonnes of spent fuel each year. </li></ul><ul><li>Most U.S. waste is currently stored in temporary storage sites requiring oversight </li></ul><ul><li>Underground storage at Yucca Mountain in U.S. </li></ul>
  8. 8. Advantages <ul><li>Nuclear power generation does emit relatively low amounts of carbon dioxide (CO2). </li></ul><ul><li>This technology is readily available. </li></ul><ul><li>It is possible to generate a high amount of electrical energy in one single plant. </li></ul>
  9. 9. Disadvantages <ul><li>The problem of radioactive waste is still an unsolved one. </li></ul><ul><li>High risks: Despite a generally high security standard, accidents can still happen. </li></ul>
  10. 10. Three Mile Island/ Chernobyl
  11. 11. Yucca Mountain
  12. 12. Transport
  13. 13. Nuclear power in ships <ul><li>The first nuclear-powered submarine, USS Nautilus put to sea in 1955 </li></ul><ul><li>Development of nuclear merchant ships began in the 1950s, but has not generally been commercially successful. </li></ul>
  14. 14. Naval nuclear accidents <ul><li>USS Thresher (sank, 129 killed) USS Scorpion (sank, 99 killed) </li></ul><ul><li>19 Russian or Soviet accidents </li></ul>
  15. 15. The End

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