The biggest nuclear catastroph

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Across
  1. 2. natural disaster responsible for the Fukushima explosion
  2. 3. Nuclear phenomenon used in power plants
  3. 7. Origin of an earthquake
  4. 8. Material used to create nuclear energy
  5. 10. Structure that uses nuclear reactions to generate electricity
  6. 11. System to avoid overheating (....... system)
  7. 12. Nuclear power plant that exploded Japan
Down
  1. 1. Consequence of the explosion of a power plant
  2. 4. The new material that covers the reactor since the explosion
  3. 5. People working in a power plant
  4. 6. Nuclear power plant that exploded in Ukraine
  5. 9. Place where nuclear energy is created
  6. 13. Gas generated by the molten core