Results of Second Kinetic AER-Benchmark


Results of Second Kinetic AER-Benchmark

Grundmann, U.

Mathematical benchmark are widely used and accepted means of verifying the reliability of numerical simulations. The present benchmark is aimed at assessing the discrepancies between three-dimensional core models used for transient calculations in VVER-reactor cores.
The second AER benchmark problem was defined at the 3nd AER Symposium in Pieštany (1993). The problem and the complete set of input data for a control rod ejection accident in a VVER-440 was described. An asymmetric control rod with a worth approximately 2 ßeff was ejected at hot zero power (HZP). The Doppler effect being the main feedback effect for this type of transients is the only feedback taken into account by an adiabatic model of fuel temperature. Therefore it was possible to calculate this type of transient with codes which do not contain a complete thermo-hydraulic model.
Results of the four codes BIPR-8 (RRI Moskau), DYN3D/M2 (RCR Rossendorf), HEXTRAN (VVT Espoo) and KOKO3D (KFKI-AERI Budapest) were obtained and analyzed by comparisons. The agreement of the results is quite satisfactory, however there exist some discrepancies.

  • Contribution to proceedings
    und Vortrag, 4th AER Symposium, Sozopol, Bulgaria, October 10 - 13, 1994, pp. 397 - 415

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Publ.-Id: 291