Thermal transport study in actinide oxides with point defects
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 f...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-08-01
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| Series: | Nuclear Engineering and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573318307812 |
| _version_ | 1818691906431877120 |
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| author | Alex Resnick Katherine Mitchell Jungkyu Park Eduardo B. Farfán Tien Yee |
| author_facet | Alex Resnick Katherine Mitchell Jungkyu Park Eduardo B. Farfán Tien Yee |
| author_sort | Alex Resnick |
| collection | DOAJ |
| description | 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 |
| first_indexed | 2024-12-17T12:49:20Z |
| format | Article |
| id | doaj.art-ad95007d42e84239b1bc23fd52b52391 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-17T12:49:20Z |
| publishDate | 2019-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-ad95007d42e84239b1bc23fd52b523912022-12-21T21:47:39ZengElsevierNuclear Engineering and Technology1738-57332019-08-0151513981405Thermal transport study in actinide oxides with point defectsAlex Resnick0Katherine Mitchell1Jungkyu Park2Eduardo B. Farfán3Tien Yee4Kennesaw State University, Department of Mechanical Engineering, Kennesaw, GA, 30144, USAKennesaw State University, Department of Mechanical Engineering, Kennesaw, GA, 30144, USACorresponding author.; Kennesaw State University, Department of Mechanical Engineering, Kennesaw, GA, 30144, USAKennesaw State University, Department of Mechanical Engineering, Kennesaw, GA, 30144, USAKennesaw State University, Department of Mechanical Engineering, Kennesaw, GA, 30144, USAWe 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 dynamicshttp://www.sciencedirect.com/science/article/pii/S1738573318307812 |
| spellingShingle | Alex Resnick Katherine Mitchell Jungkyu Park Eduardo B. Farfán Tien Yee Thermal transport study in actinide oxides with point defects Nuclear Engineering and Technology |
| title | Thermal transport study in actinide oxides with point defects |
| title_full | Thermal transport study in actinide oxides with point defects |
| title_fullStr | Thermal transport study in actinide oxides with point defects |
| title_full_unstemmed | Thermal transport study in actinide oxides with point defects |
| title_short | Thermal transport study in actinide oxides with point defects |
| title_sort | thermal transport study in actinide oxides with point defects |
| url | http://www.sciencedirect.com/science/article/pii/S1738573318307812 |
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