Nuclear plants

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Across
  1. 1. forces liquid to circulate
  2. 5. Is formed by neutrons and protons
  3. 7. Is capable to rotate a turbine
  4. 10. Allows to exchange heating
  5. 13. When low, rises the probability of fission reaction
  6. 14. Its task is to recycle steam
  7. 15. A sub-product of fission reaction
  8. 17. After this time radiation is decreased by 50%
  9. 19. One of the most dangerous fission product
Down
  1. 2. Difference between initial and final mass
  2. 3. Contain the uranium
  3. 4. Uncontrolled reaction
  4. 6. Allow to take under control fission reactions
  5. 8. Is connected to a turbine to produce electricity
  6. 9. Its task is slowing down neutron speed
  7. 11. increases the cost of a nuclear plant
  8. 12. The major problem of a nuclear plant
  9. 16. The material the nuclear reactor container is made of
  10. 18. The action of splitting a nucleus
  11. 20. Uranium isotope used in nuclear plants