This publication provides specific recommendations on research reactor instrumentation and control systems and software important to safety, including instrumentation and control system architecture and associated components, from sensors to actuators, operator interfaces and auxiliary equipment, to meet the relevant requirements of IAEA Safety Standards Series No. SSR-3, Safety of Research Reactors. The recommendations and guidance apply to both the design and configuration management of instrumentation and control systems for new research reactors and the modernization of the instrumentation and control systems at existing research reactor facilities. In addition, this Safety Guide provides recommendations and guidance on human factors engineering and human-machine interfaces, and for computer based systems and software for use in instrumentation and control systems important to safety. This Safety Guide is a revision of IAEA Safety Standards Series No. SSG-37, which it supersedes.

• 1. INTRODUCTION
  • Background
  • Objective
  • Scope
  • Structure
• 2. SAFETY CLASSIFICATION OF INSTRUMENTATION AND CONTROL SYSTEMS FOR A RESEARCH REACTOR
  • Classification of instrumentation and control systems
  • Design, construction, commissioning, operation and maintenance of instrumentation and control systems
• 3. OVERALL INSTRUMENTATION AND CONTROL SYSTEM ARCHITECTURE FOR A RESEARCH REACTOR
  • Application of defence in depth to instrumentation and control systems at a research reactor
  • Independence of instrumentation and control systems at a research reactor
  • Consideration of common cause failure in instrumentation and control systems at a research reactor
  • Architectural design of the instrumentation and control system for a research reactor
• 4. DESIGN GUIDELINES FOR INSTRUMENTATION AND CONTROL SYSTEMS FOR A RESEARCH REACTOR
  • Design basis for instrumentation and control systems for a research reactor
  • Design for reliability of instrumentation and control systems for a research reactor
    • Application of redundancy and the single failure criterion to instrumentation and control systems for a research reactor
    • Common cause failure in instrumentation and control systems for a research reactor
    • Physical separation and independence of instrumentation and control systems for a research reactor
    • Diversity of instrumentation and control systems for a research reactor
    • Failure modes of instrumentation and control systems for a research reactor
    • Fail-safe design of instrumentation and control systems for a research reactor
  • Design considerations for ageing of instrumentation and control systems at a research reactor
  • Consideration of the safety and security interface in the design of instrumentation and control systems for a research reactor
  • Equipment qualification of instrumentation and control systems for a research reactor
    • Suitability and correctness of instrumentation and control systems for a research reactor
    • Consideration of internal and external hazards in the design of instrumentation and control systems for a research reactor
    • Environmental qualification of instrumentation and control systems for a research reactor
    • Qualification of instrumentation and control systems for a research reactor for electromagnetic compatibility
  • Testing and testability of instrumentation and control systems for a research reactor
    • Test provisions for instrumentation and control systems for a research reactor
    • Preservation of control functions for instrumentation during testing
    • Considerations for the testing of instrumentation and control systems at a research reactor
    • Test programme for instrumentation and control systems at a research reactor
  • Maintainability of instrumentation and control systems at a research reactor
  • Safety assessment of instrumentation and control systems at a research reactor
  • Safety system settings for instrumentation and control systems at a research reactor
  • Identification and verification of instrumentation and control systems important to safety at a research reactor
  • Design of instrumentation and control systems at a research reactor for design extension conditions
• 5. SYSTEM SPECIFIC DESIGN GUIDELINES FOR INSTRUMENTATION AND CONTROL SYSTEMS FOR A RESEARCH REACTOR
  • Sensing devices for instrumentation and control systems at a research reactor
  • Reactor protection system
  • Other instrumentation and control systems important to safety of a research reactor
  • Design of research reactor control rooms
    • Main control room at a research reactor
    • Supplementary control room at a research reactor
  • Control systems for irradiation facilities and experimental devices at a research reactor
  • Voice communication system at a research reactor
  • Fire detection systems and fire extinguishing systems at a research reactor
  • Power supplies of instrumentation and control systems at a research reactor
• 6. OPERATION OF INSTRUMENTATION AND CONTROL SYSTEMS DURING THE OPERATION OF A RESEARCH REACTOR
  • Instrumentation and control systems and operational limits and conditions at a research reactor
    • Safety limits for a research reactor
    • Safety system settings for a research reactor
    • Limiting conditions for safe operation for a research reactor
  • Control of access to instrumentation and control systems important to safety at a research reactor
  • Maintenance, periodic testing and inspection of instrumentation and control systems at a research reactor
  • Provisions for removal from service of instrumentation and control systems for testing or maintenance
  • Instrumentation and control systems during extended shutdown of a research reactor
• 7. HUMAN FACTORS ENGINEERING AND HUMAN–MACHINE INTERFACES AT A RESEARCH REACTOR
  • Criteria for human factors engineering and design of human–machine interfaces at a research reactor
  • Human factors engineering for research reactor control rooms
• 8. COMPUTER BASED SYSTEMS AND SOFTWARE AT A RESEARCH REACTOR
  • Design considerations for computer based systems and software at a research reactor
  • Project planning for computer based systems and software at a research reactor
    • Verification and validation of computer based systems and software at a research reactor
    • Configuration management of computer based systems and software at a research reactor
    • Installation and commissioning of computer based systems and software at a research reactor
  • Specification of computer based system requirements at a research reactor
  • Software requirements for a research reactor
  • Software design for a research reactor
  • Software implementation for a research reactor
  • Verification and analysis of software for a research reactor
  • Third party assessment of software for a research reactor
  • Computer system integration at a research reactor
    • Integrated computer system tests at a research reactor
    • Validation and commissioning tests of computer based systems and software at a research reactor
    • Operation, maintenance and modification of computer based systems and software at a research reactor
• 9. CONFIGURATION MANAGEMENT OF INSTRUMENTATION AND CONTROL SYSTEMS AT A RESEARCH REACTOR
• 10. MODIFICATION AND MODERNIZATION OF INSTRUMENTATION AND CONTROL SYSTEMS AT A RESEARCH REACTOR
• REFERENCES
• Annex INSTRUMENTATION AND CONTROL SYSTEMS THAT CAN BE USED IN A RESEARCH REACTOR
• CONTRIBUTORS TO DRAFTING AND REVIEW