Thermal transport study in actinide oxides with point defects
| Autor: | Katherine Mitchell, Alex Resnick, Tien Yee, Eduardo B. Farfán, Jungkyu Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
Materials science Nuclear fuel 020209 energy Inorganic chemistry Uranium dioxide technology industry and agriculture Oxide chemistry.chemical_element 02 engineering and technology Actinide Uranium complex mixtures Oxygen lcsh:TK9001-9401 030218 nuclear medicine & medical imaging 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Thermal conductivity Nuclear Energy and Engineering chemistry Vacancy defect 0202 electrical engineering electronic engineering information engineering lcsh:Nuclear engineering. Atomic power |
| Zdroj: | Nuclear Engineering and Technology, Vol 51, Iss 5, Pp 1398-1405 (2019) |
| ISSN: | 1738-5733 |
| Popis: | We use a molecular dynamics simulation to explore thermal transport in oxide nuclear fuels with point defects. The effect of vacancy and substitutional defects on the thermal conductivity of plutonium dioxide and uranium dioxide is investigated. It is found that the thermal conductivities of these fuels are reduced significantly by the presence of small amount of vacancy defects; 0.1% oxygen vacancy reduces the thermal conductivity of plutonium dioxide by more than 10%. The missing of larger atoms has a more detrimental impact on the thermal conductivity of actinide oxides. In uranium dioxide, for example, 0.1% uranium vacancies decrease the thermal conductivity by 24.6% while the same concentration of oxygen vacancies decreases the thermal conductivity by 19.4%. However, uranium substitution has a minimal effect on the thermal conductivity; 1.0% uranium substitution decreases the thermal conductivity of plutonium dioxide only by 1.5%. Keywords: Nuclear fuel, Thermal conductivity, Defects, Molecular dynamics |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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