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Experience with MELCOR 1.8.5 and transition to 1.8.6 in VEIKI

www.veiki.hu. 2/20. Contents. MELCOR past experienceMELCOR transition to 1.8.6Application to VVER-440/213MELCOR Iodine Pool Model experience. . www.veiki.hu. 3/20. MELCOR Past experince. Successful application of MELCOR 1.8.3-1.8.51992- 2008SBLOCA d=40mm, d=100mm, d=500mm, d=2*500mmLoss of

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Experience with MELCOR 1.8.5 and transition to 1.8.6 in VEIKI

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    1. Experience with MELCOR 1.8.5 and transition to 1.8.6 in VEIKI 1st. Meeting of the European MELCOR Users Group Hosted by Paul Scherrer Institute Villigen Switzerland December 15-16, 2008 Dr. Horváth L. Gábor, VEIKI, Budapest HorvathLG@aed.veiki.hu

    2. www.veiki.hu 2/20 Contents MELCOR past experience MELCOR transition to 1.8.6 Application to VVER-440/213 MELCOR Iodine Pool Model experience

    3. www.veiki.hu 3/20 MELCOR Past experince Successful application of MELCOR 1.8.3-1.8.5 1992- 2008 SBLOCA d=40mm, d=100mm, d=500mm, d=2*500mm Loss of Feed-Water Station-Black-Out Interface LOCA – Containment bypass PRISE – Primary to Secondary Leakage Cross Comparison of MELCOR-MAAP-RELAP-SCDAP

    4. www.veiki.hu 4/20 MELCOR experimental verification - recalculations Successful application of MELCOR 1.8.3-1.8.5 in VEIKI to STORM KAEVER VANAM Phebus FPT-0 Phebus FPT-1

    5. www.veiki.hu 5/20 Major deficiencies of MELCOR eliminated with 1.8.6

    6. www.veiki.hu 6/20 MELCOR VVER-440/213 model in 1.8.6

    7. www.veiki.hu 7/20 BWR model Equivalent VVER-440 problem with fuel in bypass

    8. www.veiki.hu 8/20 Melt bypass to LP

    9. www.veiki.hu 9/20 Sensitivity to melt blockages at core entrance and core bypass

    10. www.veiki.hu 10/20 Induced break of Hotleg Important in high pressure sequences: Evaluated by Hotleg vs. Lower Head temperature MELCOR 1.8.3 only 1.8.6 has to be calculated Hotleg reaches high temperatures earlier than LH Counter-current flow NOT investigated

    11. www.veiki.hu 11/20 MELCOR 1.8.6 application: Phebus FPT-1, ISP-46

    12. www.veiki.hu 12/20 MELCOR 1.8.6 application: Phebus FPT-1, ISP-46

    13. www.veiki.hu 13/20 MELCOR 1.8.6 application: Phebus FPT-1, ISP-46

    14. www.veiki.hu 14/20 MELCOR 1.8.6 application: Phebus FPT-1, ISP-46

    15. www.veiki.hu 15/20 MELCOR 1.8.6 application: Phebus FPT-1, ISP-46

    16. www.veiki.hu 16/20 MELCOR 1.8.6 application: VVER-440/213

    17. www.veiki.hu 17/20 MELCOR 1.8.6 application: VVER-440/213

    18. www.veiki.hu 18/20 MELCOR 1.8.6 application: VVER-440/213

    19. www.veiki.hu 19/20 MELCOR 1.8.6 application: VVER-440/213

    20. www.veiki.hu 20/20

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