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Result of AGNES calculation for IRSN exercise

Result of AGNES calculation for IRSN exercise. Y. Yamane, K. Okubo and Y.Miyoshi JAEA. Modeling. k eff -equivalent cylinder was used to calculate kinetic parameters. The same kinetic behavior was expected. Volume-and-height-equivalent cylinder was used for AGNES calculation.

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Result of AGNES calculation for IRSN exercise

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  1. Result of AGNES calculation for IRSN exercise Y. Yamane, K. Okubo and Y.Miyoshi JAEA

  2. Modeling • keff-equivalent cylinder was used to calculate kinetic parameters. • The same kinetic behavior was expected. • Volume-and-height-equivalent cylinder was used for AGNES calculation. • The same reactivity feedback was expected for temperature change and void behavior.

  3. Kinetic Parameters • Prompt neutron life time: 3.210110-5(sec). • Delayed neutron fraction, bi and decay constant of precursors, li. • Reactivity coefficients

  4. Other conditions for base case • Inserted reactivity: 1.5$ • Initial weight for FB reactivity: 1.6 • Weight value decays as [1+0.6exp(-t/100)] to 1 • Volume-eq. Cylinder • Homogenious temperature distribution in fuel • Adiabatic between container and outer air

  5. Power -5000s forr01-2$

  6. Power -50s forr01-2$

  7. Power -6s forr01-2$

  8. Energy -5000s forr01-2$

  9. Temperature -5000s forr01-2$

  10. Temperature -50s forr01-2$

  11. Temperature -6s forr01-2$

  12. Power -5000s for ini. weight14-1.8

  13. Power -50s for ini. weight1.4-1.8

  14. Power –0.6s for ini. weight1.4-1.8

  15. Energy -5000s for ini. weight 1.4-1.8

  16. Temperature -5000s for ini. weight 1.4-1.8

  17. Temperature -50s for ini. weight 1.4-1.8

  18. Temperature -6s for ini. weight 1.4-1.8

  19. Power -5000s for volume eq. v.s. keff eq.

  20. Power -50s for volume eq. v.s. keff eq.

  21. Power -5000s for volume eq. v.s. keff eq.

  22. Energy -5000s for volume eq. v.s. keff eq.

  23. Temperature -5000s for volume eq. v.s. keff eq.

  24. Result for reactivity 1-2$

  25. Result for ini. weight 1-1.8 6%/0.1

  26. Result for Volume-eq. v.s. keff-eq. Conditions -23%

  27. Summary • 1st guess (not estimation) • Max. power: < 5 108 (w) [1.6 1019 (fis/s)] • Energy at 10min.: <1.5 107 (J)[4.7 1017 (fis/s)] • Energy at 1hour: <1.5 107 (J)

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