Criticality of the thorium burnup in equilibrium state |
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| Affiliation: | 1. National Center for Nuclear Research, Otwock-Swierk, Poland;2. Joint Institute for Nuclear Research, Dubna, Russia;1. School of Nuclear Science and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, China;2. State Nuclear Power Software Development Center, Beijing, 102206, China;3. National Key Laboratory of Nuclear Power Software, Beijing, 102206, China;1. Shanghai Nuclear Engineering Research and Design Institute Co. Ltd., Shanghai 200233, China;2. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;1. Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom;2. Department of Fluids Mechanics, Technical University of Catalonia (UPC BarcelonaTech) ESEIAAT, C/ Colón 11, 08222, Terrassa, Spain;1. Departments of Otolaryngology, University of Minnesota, Minneapolis, MN, United States;2. Departments of Pediatrics, University of Minnesota, Minneapolis, MN, United States;3. Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States;4. Department of Microbiology, University of Alabama at Birmingham, AL, United States |
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| Abstract: | The effective neutron multiplication factor (keff) as a function of burnup for different volume coolant (CoR) and fuel (FR) to cell ratio is presented. Additionally the Conversion Ratio (CR) of Th-232 to U-233, concentration of U-233, fissile and fission products calculation as a function of burnup are presented. The assembly is a critical reactor which makes volumes of coolant and fuel changes possible. In addition, an analytical model of calculation of keff as a function of U-233 and a poison concentration in equilibrium state are presented. One can achieve the criticality of Thorium Breeder Reactor (TBR) for enough high average neutron energy which one can obtain in Fast Breeder Reactor (FBR) only. The maximal value of CR and burnup for case of keff ≥ 1 achieves 1.4 and 360 GWd/MTU, correspondently. The calculations were done with a MCNPX 2.7 code using F2Be, Na and Pb coolants. |
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| Keywords: | Thorium cycle U-233 Th-232 Breeding reactor Neutron multiplication factor Conversion ratio |
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