Alternative Fuel Cycles Slovak Progress Report

1. 1 VUJE, Inc., Trnava 2 SUT Bratislava Alternative Fuel CyclesSlovak Progress Report P. Dařílek1, R. Zajac1, J. Breza1,2, V. Nečas2darilek@vuje.sk AER Working Group F Meeting „Spent Fuel Transmutation“ Konferenční centrum AV ČR – zámek Liblice, Czech Republic March25-28, 2008 VUJE , Inc., Okružná 5, 918 64 Trnava

2. International projects and benchmarks OECD - benchmark FP6: LWR-DEPUTY ALISIA INPRO: CZE1 GAINS EC1 VUJE , Inc., Okružná 5, 918 64 Trnava

3. OECD - benchmark OECD Depletion Calculation Benchmark devoted to MOX Fuel Cycles: • 4 PWR assemblies • 7 VVER-440 assemblies • burning of Pu is less effective in VVER-440 VUJE , Inc., Okružná 5, 918 64 Trnava

4. OECD - benchmark Development of Pu VUJE , Inc., Okružná 5, 918 64 Trnava

5. LWR-DEPUTY Th as special IM – solution of IAEA benchmark (CRP: Potential of Thorium Based Fuel Cycles to Constrain Plutonium and to Reduce Long Term Waste Toxicity) Complex IMF – benchmark: • preparation of VVER part definition • solution of PWR an VVER parts • indirect comparison with experiment for PWR VUJE , Inc., Okružná 5, 918 64 Trnava

6. LWR-DEPUTY VUJE , Inc., Okružná 5, 918 64 Trnava

7. ALISIA • Modification of RELAP5 for molten salt simulations resolved: • gaseous state of „non-water“ coolant neglected • mass exchange between coolant states not taken into account • specific „hydro-dynamic “ subsystem introduced • energy exchange with classical termohydraulic subsystems by transfer and conduction through tube walls preserved • model contains 4 equations • time evolution of quantities is modelled by ’nearly-implicit’ method • pressure as coupling quantity is replaced by flow velocity VUJE , Inc., Okružná 5, 918 64 Trnava

8. ALISIA • Successful tests of program functionality • experimental loop from: Chochlovský I. et al.: Experimental loops of project ADTT, Chemoprojekt, December 1995 • liquid - LiPb • stationary state VUJE , Inc., Okružná 5, 918 64 Trnava

9. ALISIA • Consequent SUMO proposal at WP7 • corrosion investigation of Ni-Mo and Ni-W alloys by electrochemical methods in NaF-NaBF4 and similar molten salts • numerical modelling of loops with molten salts used for analyses of most important reference transient scenarios identified for TMSR (RELA5-MSR) VUJE , Inc., Okružná 5, 918 64 Trnava

10. CZE1 Electricity balance in Slovakia consumption production new sources years VUJE , Inc., Okružná 5, 918 64 Trnava

11. CZE1 • Intention: • analysis of all available sources • analysis of situation in neighbouring countries and in the region • long-term variant solutions in agreement with GAINS VUJE , Inc., Okružná 5, 918 64 Trnava

12. GAINS • SuperPhenix calculations by spectral code HELIOS: • fuel assembly • core and blanket – difficulties in HELIOS VUJE , Inc., Okružná 5, 918 64 Trnava

13. GAINS 1/6 core –SuperPhenix Reflector - Shielding Blanket – Breeder part External fuel core 14.85 % Pu-239 Internal fuel core 11.9 % Pu-239 VUJE , Inc., Okružná 5, 918 64 Trnava

14. EC1 • Comparison of 3 fuel cycles: • UOX • PuThOX • UPuThOX • UPuThOX exhibits better transmutation ability VUJE , Inc., Okružná 5, 918 64 Trnava

15. EC1 U-Pu-Th MOX cycle ThOX Pu - all isotopes U - all isotopes UPuThOXFabrication VVER-440(UPuThOX core) STORAGE Reprocessing (U,Pu,Th)OX FPMAPu0.1% U UOXFabrication VVER-440(UOX core) Wastes URT 4.2% U-235 FPMA0.1% Pu0.1% U U UOX Reprocessing VUJE , Inc., Okružná 5, 918 64 Trnava