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Nuclear energy

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Nuclear energy Nuclear energy Presentation Transcript

  • Nuclear Energy
  • What is NuclearEnergy?The energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. Also called atomic energy.
  • Nuclear energy is produced naturally and in man-made operations under human control.  Naturally: Some nuclear energy is produced naturally. For example, the Sun and other stars make heat and light by nuclear reactions. Man-Made: Nuclear energy can be man-made too. Machines called nuclear reactors, parts of nuclear power plants, provide electricity for many cities. Man-made nuclear reactions also occur in the explosion of atomic and hydrogen bombs.
  • Nuclear energy is producedin two different ways: Nuclear Fission (In one method, large nuclei are split to release energy.) Nuclear Fusion (In the other method, small nuclei are combined to release energy.)
  • Nuclear Fission  It is a nuclear reaction in which an atomic nucleus splits into fragments, usually two fragments of comparable mass, emitting 100 million to several hundred million volts of energy.
  • Nuclear Fusion  A process in which several small nuclei combine to make a larger one whose mass is slightly smaller than the sum of the small ones. The difference in mass is converted to energy E = mc2  In stars, hydrogen fuses into helium. The energy emitted by fusion prevents the star from collapsing in on itself and causes the star to glow.
  • Applications of NuclearEnergyElectric Power GenerationMedicineScientific ResearchFood & AgricultureSpaceIndustrial Appliances
  • • Fuel is inexpensive • Requires larger capital cost• Energy generation is the because of emergency, most concentrated source containment, radioactive waste and storage systems• Waste is more compact than any source • Requires resolution of the long-term high level waste• Extensive scientific basis storage issue in most for the cycle countries• Easy to transport as new • Potential nuclear fuel proliferation issue• No greenhouse or acid rain effects
  • Nuclear Power Plant
  • Nuclear Disastersand Accidents
  • Chernobyl Disaster,UkraineOccurred on 26 April 1986 at the Chernobyl Nuclear Power Plant The accident occurred during an experiment scheduled to test a potential safety emergency core cooling feature, which took place during the normal shutdown procedure.
  • Effects  Four square kilometers of pine forest directly downwind of the reactor turned reddish-brown and died. Horses left on an island in the Pripyat River 6 km (4 mi) from the power plant died when their thyroid glands were destroyed by radiation doses. 237 people suffered from acute radiation sickness and died.  10,00,000 people exposed.
  • Hospital, classroom & schoolChernobyl Disaster effect on:
  • EffectF on Human-Beings
  • Fukushima DaiichiReactor, Japan 9.0 earthquake on 11th march,2011 decimated Japan. Fukushima nuclear power plant damaged. The tsunami broke the reactors connection to thepower grid and also resulted in flooding of the rooms containing the emergency generators. Loss of power stopped the coolant circulation thus overheating the fuel rods.
  • Effects Area around the plant uninhabitable for at least 20years. The burning fuel rods will need another 150-180 years to be safely removed from the plant.  1/10th of radiation released as compared to Chernobyl.