Overview
IEC TR 63192:2019 is a technical report developed by the International Electrotechnical Commission (IEC) that focuses on hazard analysis for instrumentation and control (I&C) systems important to safety in nuclear power plants (NPPs). This report reviews and compares current approaches in hazard analysis standards and guidance, specifically examining the requirements within the IAEA (International Atomic Energy Agency) framework and the NRC-IEEE (Nuclear Regulatory Commission / Institute of Electrical and Electronics Engineers) framework.
The document serves as an informative resource for NPP operators, system evaluators, regulators, and stakeholders involved in the safety and design of digital I&C systems. By surveying and comparing international practices, IEC TR 63192:2019 supports the development of consistent, robust approaches to hazard analysis, promoting enhanced safety and regulatory alignment globally.
Key Topics
- Hazard Analysis Frameworks: Comparison of IAEA and NRC-IEEE requirements and guidance for hazard analysis in nuclear I&C systems.
- Terminology and Definitions: Analysis of differing concepts and definitions related to safety, risk, hazard, and assessment between standard organizations.
- Comparison Criteria: Evaluation against criteria such as safety principles, processes, hazard analysis methodology, and process independence.
- Industry Benchmarks: Annexes provide comparative analysis with hazard analysis guidance from other safety-critical industries, including aerospace, automotive, railway, and medical.
- Integration of Safety Requirements: Discussion of design and operational safety requirements, referencing IAEA Safety Requirements for Design (SSR-2/1) and Operation (SSR-2/2).
- Scope of Hazard Analysis: Focus on comprehensive hazard identification, including internal and external hazards affecting I&C systems, as well as harmonization with security and reliability aspects.
Applications
IEC TR 63192:2019 has practical applications in various phases of the nuclear power plant life cycle, particularly in:
- Design and Engineering: Assisting engineers in systematically identifying potential hazards related to digital I&C systems, ensuring both design and operational safety in NPPs.
- Regulatory Compliance: Offering a clear comparison of international safety requirements that supports compliance efforts with IAEA and NRC-IEEE frameworks.
- Risk Management: Facilitating improved hazard identification and risk assessment processes, reducing the likelihood and impact of safety-related incidents.
- Cross-industry Learning: Providing benchmarks and lessons learned from hazard analysis practices in sectors such as aerospace (DO-178C), automotive (ISO 26262), and medical devices (IEC 60601-1).
- Stakeholder Collaboration: Serving as a common reference point for operators, regulators, and system evaluators in harmonizing global safety standards.
Related Standards
IEC TR 63192:2019 references and is closely related to several major international standards, including:
- IEC 61513 – General requirements for instrumentation and control systems important to nuclear safety.
- IEC 60880 / IEC 61226 – Classification and software requirements for safety systems.
- IEC 61508 – Functional safety of electrical/electronic/programmable electronic safety-related systems.
- IAEA SSR-2/1 and SSR-2/2 – Safety requirements for design and operation of nuclear power plants.
- IAEA SSG-39 – Specific guidance on the design of I&C systems for NPPs.
- IEEE 603 / IEEE 7-4.3.2 / IEEE 1228 / IEEE 1012 – Criteria for safety systems and software safety plans.
- Other Industry Standards: Reference to DO-178C (aerospace), ISO 26262 (automotive), IEC 62278 (railways), and IEC 60601-1 (medical).
Conclusion
IEC TR 63192:2019 provides a valuable, state-of-the-art survey and comparison of international hazard analysis requirements for nuclear power plant I&C systems. Its focus on aligning and understanding global best practices supports more effective and harmonized safety case development, risk management, and regulatory compliance in the nuclear industry. By leveraging insights from related safety-critical industries, it encourages continuous improvement and the adoption of robust hazard analysis methodologies for safer, more reliable nuclear power plant operations.