A study on the burn-up characteristics of inert matrix fuels |
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| Affiliation: | 1. SCK⋅CEN, Biosphere Impact Studies, Boeretang 200, 2400 Mol, Belgium;2. Centre for Environmental Research, Universiteitslaan 1, 3590 Diepenbeek, Belgium;1. Williamson Research Centre for Molecular Environmental Science and Research Centre for Radwaste and Decommissioning, School of Earth, Atmospheric & Environmental Sciences, University of Manchester, M13 9PL, UK;2. Atomic Weapons Establishment PLC, Aldermaston, Berkshire RG7 4PR, UK;3. Centre for Radiochemistry Research, School of Chemistry, University of Manchester, Manchester M13 9PL, UK;1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira, 2-chome, Aoba-ku, Sendai 980-8577, Japan;2. Department of Nuclear Engineering, Kyoto University, Kyoto Daigaku-Katsura, Nishikyo, Kyoto 615-8530, Japan;1. Department of Chemistry, University of Idaho, Moscow, ID 83844, USA;2. Idaho National Laboratory, Idaho Falls, ID 83415, USA |
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| Abstract: | Proper disposal of minor actinides (MA), long-lived fission products (LLFPs), and transuranium element (TRU) plays a key role in the sustainable development of fission nuclear power. Adoption of inert matrix fuels (IMFs) can effectively reduce the amount of 237Np and Np element in the spent fuel of present-day commercial power reactors. In order to study the burn-up characteristics of IMFs caused by the unique composition, burn-up calculations and MA accumulation of two typical IMFs, PuO2 + ZrO2 + MgO and PuO2 + ThO2, are performed in this paper. Results indicate that kinf at beginning of life (BOL) and reactivity drop with burn-up for PuO2 + ZrO2 + MgO are much larger than those of PuO2 + ThO2 IMF. The yields of 237Np and Np element in IMFs are two orders smaller than those of UO2 and mixed oxide (MOX) fuels. For the same PuO2 volume fraction and a certain burn-up, the masses of 237Np, Np element, and 241Am for PuO2 + ZrO2 + MgO are smaller than those of PuO2 + ThO2; however, the mass of total MA is larger. IMF has high destruction efficiencies of TRU and plutonium (Pu). The results and conclusion provide basic data for the ongoing IMF design and application study. |
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| Keywords: | Inert matrix fuels (IMFs) Burn-up characteristics Minor actinides production Transuranium element (TRU) |
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