Investigation of Modified UO2 Fuel with Anomalously High Thermal Conductivity
| Autor: | S. V. Kuz’min, V. M. Ryabyi, A. B. Gaiduchenko, M. I. Zakharova, V. V. Popov, M. Yu. Kuz’min, G. E. Kiknadze, V. N. Rumyantsev, I. S. Kurina, F. N. Kryukov |
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| Rok vydání: | 2015 |
| Předmět: |
Fission products
Materials science 020209 energy Uranium dioxide Pellets chemistry.chemical_element Sintering 02 engineering and technology Uranium Heat capacity law.invention chemistry.chemical_compound Thermal conductivity Nuclear Energy and Engineering chemistry Chemical engineering law 0202 electrical engineering electronic engineering information engineering Calcination |
| Zdroj: | Atomic Energy. 119:190-199 |
| ISSN: | 1573-8205 1063-4258 |
| DOI: | 10.1007/s10512-015-0047-x |
| Popis: | Pre- and post-reactor studies of the properties of modified uranium dioxide fuel fabricated by a modernized water technology, including cooling of ammonium polyuranate with large and nanosize particles obtained simultaneously followed by calcination, reduction, pressing, and sintering of pellets, were performed. The properties of such fuel are compared with those of fuel obtained by the standard water technology. It is found that the heat capacity and thermal conductivity of such fuel are 1.8–2 times higher than the reference values and that the fuel possesses high microstructural stability and capacity for retaining gaseous fission products during irradiation. This is due to special properties: the presence of nanodispersity in grains and metal clusters in which the uranium ions form U–U chemical bonds with one another. |
| Databáze: | OpenAIRE |
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