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Alternative Fuel Cycles Slovak Progress Report

This report from VUJE, Inc. presents significant advancements in the utilization of molten salt technologies and plutonium-based fuel cycles within the context of Slovak alternative fuel cycles. Highlighting key international benchmarks and collaborations, the report details innovative research on spent fuel transmutation, including the development of thorium-based fuel cycles aimed at reducing long-term waste toxicity. Emphasizing experimental results and numerical modeling approaches, this work addresses critical challenges in nuclear energy sustainability and efficiency.

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Alternative Fuel Cycles Slovak Progress Report

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  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

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