| Autor: |
Kyuseok Song, Yeong-Keong Ha, Jong-Goo Kim, Soon-Dal Park, Yang-Soon Park |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Nuclear Engineering and Technology. 43:309-316 |
| ISSN: |
1738-5733 |
| DOI: |
10.5516/net.2011.43.3.309 |
| Popis: |
Molybdenum is the most abundant fission product since its fission yield is equivalent to that of xenon, and it has a very special role in the chemistry of nuclear fuel because it influences the oxygen potential of UO₂ fuel. In this study, the distribution of molybdenum in spent UO2 fuel specimens with 33.3, 41.0 and 57.6 GWd/tU burnup was measured by a LA-ICP-MS system and the reproducibility of the measured data was obtained. The Mo distribution was almost constant along the radius of a fuel except an increase at the periphery of the fuel. It showed a drop in reproducibility with relatively high deviation of measured values for the highest burnup fuel. To explain this, the state of molybdenum in a UO₂ matrix and its effect on the oxidation behavior of UO₂ were investigated. The low reproducibility was explained by the segregation of molybdenum, and the inhibition of oxidation by the molybdenum was also observed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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