nuclear energy

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Across
  1. 1. the central portion of a nuclear reactor containing the fuel
  2. 4. The hazardous, byproduct material left over after nuclear fuel is used in a reactor.
  3. 5. The dense core at the center of an atom consisting of protons and neutrons.
  4. 6. The spontaneous emission of energetic particles or rays from unstable atomic nuclei.
  5. 9. High-speed electrons or positrons emitted during radioactive decay
  6. 10. amount of time it takes for half of the radioactive nuclei in a sample to decay.
  7. 14. Device inside a power plant used to start and control a nuclear chain reaction.
  8. 16. Protective barriers used to prevent the escape of radiation.
  9. 17. Device that cools steam back into liquid water.
  10. 23. rotary engine driven by steam to generate electricity.
  11. 24. An uncharged subatomic particle used to initiate a fission reaction
  12. 25. A positively charged particle found in the nucleus of an atom
  13. 27. A type of radiation consisting of two protons and two neutrons.
  14. 28. A severe accident where reactor fuel melts due to overheating.
  15. 30. A dense, silvery radioactive element created in nuclear reactors
Down
  1. 1. An ongoing series of nuclear fission reactions where neutrons released split further nuclei.
  2. 2. Fluid circulated through the reactor core to transfer heat.
  3. 3. High-energy electromagnetic radiation emitted from an atomic nucleus
  4. 7. Atoms of the same element with different numbers of neutrons
  5. 8. Radioactive residue left over from mining and processing Uranium
  6. 11. Long, slender metal tubes packed with uranium pellets placed inside a reactor core.
  7. 12. where two or more light atomic nuclei collide and combine to form a heavier nucleus.
  8. 13. Material used to slow down fast neutrons in a reactor
  9. 15. The process of increasing the percentage of Uranium-235 in fuel.
  10. 18. The spontaneous breakdown of an unstable atomic nucleus.
  11. 19. splitting a heavy atomic nucleus into two smaller fragments
  12. 20. A small, cylinder-shaped piece of nuclear fuel.
  13. 21. Facility where nuclear chain reactions are initiated, controlled, and sustained to generate electricity.
  14. 22. The heavy, metallic, nonrenewable element most widely used as fuel in nuclear power plants.
  15. 26. The location in Ukraine that experienced a devastating nuclear disaster in 1986.
  16. 29. The Japanese nuclear power plant that suffered major damage following a massive tsunami in 2011.