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http://dx.doi.org/10.3795/KSME-B.2011.35.3.255

Numerical Evaluation of Debris Transport During LOCA Blow-Down Phase of OPR1000 Nuclear Power Plant  

Choi, Kyung-Sik (School of Mechanical Engineering, Pusan Nat'l Univ.)
Park, Jong-Pil (School of Mechanical Engineering, Pusan Nat'l Univ.)
Jeong, Ji-Hwan (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kim, Won-Tae (Research Institute of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.3, 2011 , pp. 255-262 More about this Journal
Abstract
In a loss-of-coolantaccident, considerable debris may be generated and transported to the recirculation sump. The accumulation of debris will reduce the netpositivesuctionhead and threaten the safety of thenuclear power plant. Both NEI 04-07 and USNRC SER suggesteda CFD methodology. However, additional investigation is needed to consider the unique characteristics of nuclear power plants. The transport of the generated debris is strongly influenced by the break location and the plant characteristics, including the configuration.In this paper, a CFD methodology for blow-down transport evaluation is proposed and applied to an OPR1000 nuclear power plant. The results show that the percentage of small debris transported to the upper containment is 32%, which is 7% larger than the valuegiven in the NEI 04-07 baseline analysis. This result may be used as a point of reference in future analytical studies.
Keywords
Nuclear Power Plant; Loss of Coolant Accident; Blow-down Transport; Recirculation Sump; Transport Fraction of Debris; Computational Fluid Dynamics;
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