Chapter 1 Introduction 1．1 Generation-IV Nuclear Reactor Systems 1．2 Sodium-Cooled Fast Reactors 1．2．1 Development history and current situation of SFRs 1．2．2 System characteristics of SFRs 1．3 SFR Safety Analysis and Severe Accidents 1．4 Particle-Bed-Related Phenomena During SFR Severe Accident 1．4．1 Molten-poolmobility 1．4．2 Molten-pool sloshing motion 1．4．3 Debris-bed formation behavior 1．4．4 Debris-bed self-leveling behavior 1．5 Summary References Chapter 2 Molten-Pool Mobility 2．1 Introduction 2．2 Theoretical Models and Methods for Molten-Pool Mobility 2．2．1 Multiphase flow model 2．2．2 Particle viscosity model 2．2．3 Particle jamming model 2．3 Molten-Pool Mobility in a Liquid-Dominant Particle- Rich Pool 2．3．1 Experimental conditions in a liquid-dominant particle-rich pool 2．3．2 Simulation condition for the liquid-dominant particle-rich pool experiments 2．3．3 Analyses of the liquid-dominant particle-rich pool experiments and simulations 2．4 Molten-Pool Mobility-in a Particle-Dominant Bubble Visualization Pool 2．4．1 Experimental condition in a particle-dominant bubble-visualization pool 2．4．2 Simulation condition for the particle-dominant bubble-visualization pool experiments 2．4．3 Analyses of the particle-dominant bubble-visualization pool experiments and simulations 2．5 Summary References Chapter 3 Molten-PooI Sloshing Motion 3．1 Introduction 3．2 Sloshing Motion in a Pure Liquid Pool 3．2．1 Symmetric dam-break conditions 3．2．2 Asymmetric dam-break condition 3．2．3 Fluid-step condition 3．2．4 Centralized molten-fuel-fragment falling condition …… Chapter 4 Debris Bed Formation Behavior Chapter 5 Debris Bed Self-Leveling Behavior Chapter 6 Conclusion and Future Prospect
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