VALIDATION OF COUPLED CODES IN VALCO WP1 USING MEASURED VVER DATA


VALIDATION OF COUPLED CODES IN VALCO WP1 USING MEASURED VVER DATA

Hämäläinen, A.; Vanttola, T.; Weiss, F.-P.; Mittag, S.; Kliem, S.; Kozmenkov, Y.; Keresztúri, A.; Hádek, J.; Strmensky, C.; Stefanova, S.; Kuchin, A.; Hlbocky, P.; Siko, D.; Danilin, S.

The collection of measured data from transients in VVER type NPPs has been used for the validation of coupled thermal hydraulics / neutron kinetics codes in the previous PHARE project SRR1/95 and continuing now in the Work Package 1 of the VALCO project with new types of transients and new data. Firstly, a collection of five transients was made, then two transients; ‘Drop of control rod at nominal power at Bohunice-3’ for VVER-440 reactors and ‘Coast-down of 1 from 3 working MCPs at Kozloduy-6’ for VVER-1000 reactors, were used in code validation. Eight institutes participated with ten calculations for the code validation with five different combinations of coupled codes. Used thermal hydraulic codes were ATHLET, SMABRE and RELAP5 and the neutron kinetic codes DYN3D, HEXTRAN, KIKO3D and BIPR8.

The amount of collected data in WP1 was excessive. Simultaneous calculation of the selected transients brought up additional specification needs for data, which improved its quality. Further, the ability to interpret plant data has increased among the participants. The general behaviour of both transients was quite well calculated with all the codes and as a result more information in some special phenomena was received. The differences between the calculations pave the way for future needs of more accurate fuel models in the coupled codes.

  • Lecture (Conference)
    13. Symposium of AER, Dresden, 22-26 September, 2003, pp. 555-576
  • Contribution to proceedings
    13. Symposium of AER, Dresden, 22-26 September, 2003, pp. 555-576

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Publ.-Id: 5897