Three-Dimensional Modeling of Debris Mixing and Sedimentation in Severe Accidents Using the Moving Particle Semi-Implicit Method Coupled with Rigid Body Dynamics
| Autor: | Gyoodong Jeun, Hyun Sun Park, Shane Park, Bum Jin Cho |
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| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
010308 nuclear & particles physics business.industry Numerical analysis 0211 other engineering and technologies Dimensional modeling 02 engineering and technology Mechanics Computational fluid dynamics Condensed Matter Physics Breakup Rigid body dynamics Rigid body Corium 01 natural sciences Debris Classical mechanics Nuclear Energy and Engineering 0103 physical sciences 021108 energy business Geology |
| Zdroj: | Nuclear Technology. 181:227-239 |
| ISSN: | 1943-7471 0029-5450 |
| Popis: | Particle mixing and sedimentation, related to corium debris bed formation and coolability in severe accidents, is investigated using a new computational fluid dynamics tool: the Analysis of Debris Dynamics and Agglomeration (ADDA) code. ADDA was developed based on an enhanced numerical method combining the moving particle semi-implicit algorithm with a rigid body dynamic model. The analysis successively simulates the entire process of debris bed formation, including corium jet breakup, mixing, and sedimentation. The methodology allows identification of key characteristics in the formation of the corium debris bed. Two-dimensional (2-D) and three-dimensional (3-D) simulations were utilized to model the detailed flow structures and mixing phenomena, along with the final sedimentation process, and were compared to the Q21 QUEOS test performed at Forschungszentrum Karlsruhe, Germany. For the analysis of debris bed formation, it is recommended that full 3-D simulations be utilized to provide enhanced a... |
| Databáze: | OpenAIRE |
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