The recommendations provided in this Safety Guide are aimed primarily at operating organizations of nuclear power plants and regulatory bodies. It covers the concept of operational limits and conditions (OLCs), their content as applicable to nuclear power plants, and the responsibilities of the operating organization for their establishment, modification, compliance and documentation. Operating procedures (including emergency operating procedures and severe accident management guidelines) to support the implementation of the OLCs and to ensure their observance are also within the scope of this Safety Guide.

• 1. INTRODUCTION
  • Background
  • Objective
  • Scope
  • Structure
• 2. THE CONCEPT OF OPERATIONAL LIMITS AND CONDITIONS AND THEIR DEVELOPMENT
  • The concept of operational limits and conditions
  • Development of operational limits and conditions
• 3. SAFETY LIMITS
• 4. LIMITING SETTINGS FOR SAFETY SYSTEMs
• 5. LIMITS AND CONDITIONS FOR NORMAL OPERATION
• 6. SURVEILLANCE AND TESTING REQUIREMENTS
• 7. OPERATING PROCEDURES AND GUIDELINES
  • General
  • Particular aspects of emergency operating procedures
  • Severe accident management guidelines
  • Accidents at multiple unit sites
  • Operating procedures in the commissioning stage
• 8. DEVELOPMENT OF OPERATING PROCEDURES
• 9. COMPLIANCE WITH OPERATIONAL LIMITS AND CONDITIONS AND OPERATING PROCEDURES
• Appendix I SELECTION OF LIMITS AND CONDITIONS FOR NORMAL OPERATION
  • Negative reactivity
    • Reactivity coefficients
    • Rate of insertion for positive reactivity
    • Monitoring the neutron flux in the reactor core
    • Devices for reactivity control
    • Reactivity differences
    • Liquid neutron absorber systems
    • Alterations to the core
    • Prevention of boron dilution events
    • Reactor protection system and instrumentation for other safety systems
    • Instrumentation and control for remote shutdown
    • Temperature and critical power ratio of the reactor coolant system
    • Pressure and water level of the reactor coolant system
    • Reactor power
    • Distribution of reactor power
    • Chemical quality of the reactor coolant
    • Pressure safety valves and relief valves
    • Moderator and cover gas system
    • Steam generators
    • Leakage of the reactor coolant system
    • Reactor coolant radioactivity
    • Ultimate heat sink
    • Removal of decay heat at shutdown
    • Emergency core cooling systems
    • Ventilation systems
    • Ventilation of secondary containment
    • Service systems
    • Electrical power systems and other power sources
    • Seismic monitoring
    • Movement of heavy objects
    • Fuel handling
    • Storage of irradiated fuel
    • Storage of fresh fuel
    • Instrumentation for radiation monitoring
    • Plant staffing
    • Fire protection systems
    • Consumables and spare parts
• Appendix II DEVELOPMENT OF OPERATING PROCEDURES (OUTLINES)
• REFERENCES
• Annex EXAMPLE TO ILLUSTRATE THE INTERRELATIONSHIP BETWEEN A SAFETY LIMIT, A SAFETY SYSTEM SETTING AND A LIMIT FOR NORMAL OPERATION
• CONTRIBUTORS TO DRAFTING AND REVIEW