Part II: Whole-Plant Analysis

• 3. Core Thermal-Hydraulics
  • 3.1. Introduction
  • 3.2. SAS4A/SASSYS‑1 Channel Approach
  • 3.3. Pre-boiling Transient Heat Transfer, Single Pin Model
  • 3.4. Steady-State Thermal Hydraulics
  • 3.5. Transient Heat Transfer after the Start of Boiling
  • 3.6. Fuel-Cladding Bond Gap Conductance
  • 3.7. Fuel Pin Heat-transfer After Pin Disruption or Relocation of Fuel or Cladding
  • 3.8. Heat-transfer Time Step Control
  • 3.9. Steady-State and Single-Phase Transient Hydraulics
  • 3.10. Multiple-Pin Model
  • 3.11. Subassembly-to-subassembly Heat Transfer
  • 3.12. Interaction with Other Models
  • 3.13. Subroutine Descriptions and Flowcharts
  • 3.14. Subchannel Treatment Details
  • 3.15. Input and Output
  • 3.16. Thermal Properties of Fuel and Cladding
  • 3.17. References
  • 3.18. Nomenclature
  • 3.19. Appendices
• 4. Reactor Point Kinetics, Decay Heat, and Reactivity Feedback
  • 4.1. Introduction
  • 4.2. Reactor Power
  • 4.3. Delayed-Neutron Precursors
  • 4.4. Decay Heat
  • 4.5. Net Reactivity
  • 4.6. Solution Methods
  • 4.7. Code Organization and Data Flow
  • 4.8. Input/Output Description
  • 4.9. References
  • 4.10. Nomenclature
  • 4.11. Appendices
• 5. Primary and Intermediate Loop Thermal Hydraulics Module
  • 5.1. Introduction
  • 5.2. Hydraulic Calculations
  • 5.3. Specific Components: Contributions to Flow and Pressure Equations
  • 5.4. Liquid Temperature Calculations
  • 5.5. Steam Generator
  • 5.6. Air Dump Heat Exchanger
  • 5.7. Cover Gas Flow and Pressure Calculations
  • 5.8. Overall Solution and Time Step Control
  • 5.9. Steady-State Initialization
  • 5.10. PRIMAR-1 Option
  • 5.11. Interaction With Other SAS4A/SASSYS‑1 Models
  • 5.12. Subroutine Descriptions and Flow Charts
  • 5.13. Input/Output Description
  • 5.14. References
  • 5.15. Nomenclature
  • 5.16. Appendices
• 6. Control System
  • 6.1. Introduction
  • 6.2. Generalized Model
  • 6.3. Solution Techniques
  • 6.4. Guide to User Application
  • 6.5. Control System Signals
  • 6.6. References
  • 6.7. Nomenclature
  • 6.8. Appendix 6.1: Control System Input Description
• 7. Balance of Plant
  • 7.1. Introduction
  • 7.2. Network Thermal/Hydraulic Model
  • 7.3. Steam Generator Model
  • 7.4. Component Models
  • 7.5. References
  • 7.6. Nomenclature
  • 7.7. Appendices