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Nuclear Science…Necessary?

Nuclear Science…Necessary?. Identify whether you agree or disagree with each of the following statements. Nuclear power is safe and needed to keep up with our current energy demands. Idaho is a good location for the proposed plants in Twin Falls and on the Payette.

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Nuclear Science…Necessary?

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  1. Nuclear Science…Necessary? • Identify whether you agree or disagree with each of the following statements. • Nuclear power is safe and needed to keep up with our current energy demands. • Idaho is a good location for the proposed plants in Twin Falls and on the Payette. • Nuclear weapons are necessary for a super-power to maintain their status. • Idaho is an ideal location for storing the nuclear waste and the government money received outweighs the risks.

  2. Nuclear Science Bravo – 15,000 kilotons

  3. Daily Dose of Chem Strontium-90, 90Sr, is formed in nuclear reactors during the explosion of nuclear weapons. It is a radioactive isotope and generates beta particles as it decays. The half-life of strontium-90 is 29 years. If ingested it can cause leukemia and other cancers in humans. Find strontium on a periodic table, and then suggest a reason why some of the strontium-90 that is absorbed tends to remain in the body for a long time.

  4. Resources • Grave of the Fireflies (1988) • Five Men at Ground Zero • Double Blasted • How Far? • How Stuff Works? Nuclear Power Plants • Crash Course Nuclear Chemistry Part One • US Department of Energy Radioisotopes in Space • Medical Radioisotopes

  5. Is Nuclear Power Good or Bad? • https://www.youtube.com/watch?v=6lbjxk1Lexs • Uranium: Twisting the Dragon’s Tail PBS • http://www.pbs.org/program/uranium-twisting-dragons-tail/

  6. Nuclear Symbols Mass number (p+ + no) Element symbol Atomic number (number of p+)

  7. Types of Radioactive Decay 4 2+ He 2 • alpha production (a): helium nucleus • beta production (b): 0 e 1 -

  8. Alpha Radiation Limited to VERY large nuclei

  9. Beta Radiation Converts a neutron into a proton.

  10. Types of Radioactive Decay • gamma ray production (g): • positron production : • electron capture: (inner-orbital electron is captured by the nucleus) 0 e 1

  11. Types of Radiation

  12. How Do We Know? Deflection of Decay Particles attract Opposite charges_________ each other. repel Like charges_________ each other.

  13. Nuclear Stability Decay will occur in such a way as to return a nucleus to the band (line) of stability. Iron and its unusual properties

  14. Half-life Concept

  15. Sample Half-Lives

  16. A Decay Series A radioactive nucleus reaches a stable state by a series of steps

  17. Nuclear Fission and Fusion • Fusion:Combining two light nuclei to form a heavier, more stable nucleus. • Fission: Splitting a heavy nucleus into two nuclei with smaller mass numbers.

  18. Energy and Mass Nuclear changes occur with small but measurable losses of mass. The lost mass is called the mass defect, and is converted to energy according to Einstein’s equation: DE = Dmc2 Dm = mass defect DE = change in energy c = speed of light Because c2 is so large, even small amounts of mass are converted to enormous amount of energy.

  19. Fission

  20. Fission Processes A self-sustaining fission process is called a chain reaction.

  21. A Fission Reactor

  22. Fusion – Star Power

  23. Nature takes back over • Fukushima • http://www.boredpanda.com/photos-fukushima-exclusion-zone-podniesinski/?utm_source=facebook&utm_medium=link&utm_campaign=BPFacebook • Chernobyl • http://content.time.com/time/photogallery/0,29307,2067393,00.html

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