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DUKOVANY NPP - FUEL CYCLE DEVELOPMENT

DUKOVANY NPP - FUEL CYCLE DEVELOPMENT. J. Bajgl josef.bajgl@cez.cz. 17-th Symposium of AER Yalta, Ukraine. 24.-28.9. 2007. 3.82%. 5-years FA. Dukovany NPP – fuel utilisation overview. Beginning of operation. PAST. FUTURE. Gd-2M. Gd-1. 1.6, 2.4, 3.6%. Gd-2.

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DUKOVANY NPP - FUEL CYCLE DEVELOPMENT

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  1. DUKOVANY NPP - FUEL CYCLE DEVELOPMENT J. Bajgl josef.bajgl@cez.cz 17-th Symposium of AER Yalta, Ukraine 24.-28.9. 2007

  2. 3.82% 5-years FA Dukovany NPP – fuel utilisation overview Beginning of operation PAST FUTURE Gd-2M Gd-1 1.6, 2.4, 3.6% Gd-2 Gd-2X or next generationFA ?? 4-years FA Gd-2+ 1985 1990 1995 2000 2005 2010 2015

  3. PAST FUTURE 1375 MWth440 MWel 1444 MWth~500 MWel Out-in cycle In-out cycle - L3P 3y cycle 4y cycle 5y cycle (5+x)y cycle Projected lifetime LTO Project 1985 1995 2005 2015 2025 2035 2045 DNPP Operation – general information

  4. Projected lifetime – 30 years ½ 90-ties – intention to operate DNPP for 40 years THEN founding of „DNPP Long Term Operation Team“ Participation in SALTO Programme (IAEA) Technical economic analysis of equipment modernisation – evaluated variants: +10, +20, +30 years Final report – negotiation in ČEZ a.s. Board of directors in 10/2007 LTO Project – general information

  5. Crucial question: annealing of RPVIf we will be able to save L3P strategy, there is very probable that NOT. Is it possible to modify fuel cycle strategy to minimize power production losses during equipment modernisation? Yes, if we change 12-month to 18-th fuel cycle. But it is contrary to the L3P strategy. LTO Project demand for fuel cycle I

  6. Is it possible to save L3P strategy (= low RPV dose) in 18-month fuel cycle in VVER-440? We have to search reserve enrichment – 4.95% limit assembly construction (lattice pitch, shroud or shroudless?, etc.) operational limits definitions. Start of analyses of VVER-440 6 x 12 month and 4 x 18 month fuel cycles. LTO Project demand for fuel cycle II

  7. It is possible, that it will not be possible to realize those cycles, but we expect that we define frontier of possible VVER-440 fuel cycle more realistic. LTO Project demand for fuel cycle III

  8. Relative RPV dose

  9. Unit 3, Cycle 19 59 Enri. [%] No FA [pl] Year Fuel type 57 58 0 3.82 1 +6 CA 53 54 55 56 4.25 1 72 Gd-2 48 49 50 51 52 66 2 3.82 +12 CA 42 43 44 45 46 47 4.25 2 0 35 36 37 38 39 40 41 Gd-2 78 28 29 30 31 32 33 34 3 3.82 +6 CA 20 21 22 23 24 25 26 27 4.25 3 0 Gd-2 11 12 13 14 15 16 17 18 19 72 4 3.82 +13 CA 01 02 03 04 05 06 07 08 09 10 3.82 5 24 Gd-2 - 1st transient reload

  10. Unit 3, Cycle 20 59 Enri. [%] No FA [pl] Year Fuel type 57 58 0 3.82 1 +12 CA 53 54 55 56 4.25 1 54 Gd-2 49 50 51 52 48 0 2 3.82 +6 CA 42 43 44 45 46 47 4.25 2 72 35 36 37 38 39 40 41 Gd-2 66 28 29 30 31 32 33 34 3 3.82 +12 CA 20 21 22 23 24 25 26 27 4.25 3 0 Gd-2 11 12 13 14 15 16 17 18 19 72 4 3.82 +1 CA 01 02 03 04 05 06 07 08 09 10 3.82 5 48 +6 CA Gd-2 – 2nd transient reload

  11. Conclusions I • Fuel cycle of Dukovany NPP was shortly described. • Dukovany LTO Project impact to fuel cycle strategy was discussed. • RPV dose on EDU-3 was shown.

  12. 2015-45 2007 Terra incognita Hic (non) sunt leones 1985 Conclusions II

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