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Structural Engineering and Mechanics Volume 51, Number 6, September25 2014 , pages 1005-1016 DOI: https://doi.org/10.12989/sem.2014.51.6.1005 |
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Numerical study on fluid flow by hydrodynamic loads in reactor internals |
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Da-Hye Kim, Yoon-Suk Chang and Myung-Jo Jhung
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| Abstract | ||
| Roles of reactor internals are to support nuclear fuel, provide insertion and withdrawal channels of nuclear fuel control rods, and carry out core cooling. In case of functional loss of the reactor internals, it may lead to severe accidents caused by damage of nuclear fuel assembly and deterioration of reactor vessel due to attack of fallen out parts. The present study is to examine fluid flows in reactor internals subjected to hydrodynamic loads. In this context, an integrated model was developed and applied to two kinds of numerical analyses; one is to analyze periodic loading effect caused by pump pulsation and the other is to analyze random loading effect employing different turbulent models. Acoustic pressure distributions and flow velocity as well as pressure and temperature fields were calculated and compared to establish appropriate analysis techniques. | ||
| Key Words | ||
| hydrodynamic loads; pump pulsation frequency; reactor internals; turbulent models | ||
| Address | ||
| Da-Hye Kim, Yoon-Suk Chang : Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin 446-701, Korea Myung-Jo Jhung : Korea Institute of Nuclear Safety, Guseong-dong, Yuseong-gu, Daejeon 305-338, Korea | ||