REACTOR KINETICS. What is reactor kinetics? - PowerPoint PPT Presentation

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REACTOR KINETICS. What is reactor kinetics?
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REACTOR KINETICS. What is reactor kinetics?

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  1. REACTOR KINETICS. What is reactor kinetics? Reactor reaction on reactivity changes (whatever are the reasons of changes) Generally not possible T11: Reactor Kinetics

  2. Principles of a Nuclear Reactor Leakage E N2 2 MeV N1 Fast fission n n/fission Energy Slowing down Resonance abs. ν ≈ 2.5 Non-fissile abs. Non-fuel abs. 1 eV Fission 200 MeV/fission Leakage T:Reactor Kinetics

  3. Homogeneous infinite reactor T:Reactor Kinetics

  4. T:Reactor Kinetics

  5. Kinetic Equations T:Reactor Kinetics

  6. Solution of Kinetic Equations T:Reactor Kinetics

  7. Delayed neutrons ignored n(t)/n(0) ρ0 >0 C(t)/C(0) ρ0 <0 ρ0 Time T:Reactor Kinetics

  8. Inhour Equation Unit “inverse hour” = inhour 1 inhour = amount of reactivity needed to make the reactor period equal to one hour 1 pcm (per cent mille) = 10-5 of Δk/k 1$ is equal to ρ = β T:Reactor Kinetics

  9. T:Reactor Kinetics

  10. Special Cases T:Reactor Kinetics

  11. T:Reactor Kinetics

  12. T:Reactor Kinetics

  13. n(t)/n(0) ρ0 = –0.5% ρ0 = –5% ρ0 = –10% T:Reactor Kinetics

  14. The END T:Reactor Kinetics

  15. T:Reactor Kinetics

  16. T:Reactor Kinetics

  17. T:Reactor Kinetics

  18. Graphite-moderated: lp = 10-3 Water-moderated: lp = 10-4 Fast reactors: lp = 10-7 T:Reactor Kinetics