12. Coolant Voiding

• 12.1. Introduction
• 12.2. Liquid Slug Flow Rates
• 12.3. Interface Velocities
• 12.4. Bubble Formation and Collapse
• 12.5. Uniform Vapor Pressure Model: Small Vapor Bubbles
  • 12.5.1. Heat Flow to Vapor from Cladding and Structure
  • 12.5.2. Heat Flow through Liquid-Vapor Interface
  • 12.5.3. Change in Vapor Energy
  • 12.5.4. Energy Balance
  • 12.5.5. Vapor Temperatures
• 12.6. Vapor Pressure Gradient Model: Large Vapor Bubbles
  • 12.6.1. Continuity and Momentum Equations
  • 12.6.2. Finite Differencing
  • 12.6.3. Simultaneous Solution of the Differenced, Linearized Mass and Momentum Equations
• 12.7. Voiding Due to Gas Release from Failed Fuel Pins
• 12.8. Time Step Controls
• 12.9. Interaction with Other SASSYS-1 Models
• 12.10. Detailed Flow Description
• 12.11. Input Description
• 12.12. Sample Output
• 12.13. Physical Properties of Sodium
• 12.14. References
• 12.15. Nomenclature
• 12.16. Appendices
  • 12.16.1. Derivation of the Expression for the Spatial Derivative of the Liquid Temperature at a Liquid-Vapor Interface
  • 12.16.2. Gaussian Elimination Solution of Linearized Vapor-Pressure-Gradient Equations