As Member States seek to extend the operating lifetime of nuclear power plants beyond that which was originally licensed, safety oversight of ageing management and long term operation (LTO) has become increasingly important. This Safety Report provides technical and practical information based on existing regulatory approaches and practices of Member States, and the application of the IAEA Safety Standards. This includes requirements and pre-conditions of the regulatory body for LTO, authorization processes applied to LTO, and regulatory practices and documentation to prepare for and implement LTO. The report is intended for nuclear safety authorities, operating organizations, licensees, manufacturers, designers and technical support organizations considering authorization for LTO of nuclear power plants.

• 1. INTRODUCTION
  • 1.1. Background
  • 1.2. Objective
  • 1.3. Scope
  • 1.4. Structure
• 2. LEGAL FRAMEWORK FOR SAFETY IN MEMBER STATES
• 3. REGULATORY REQUIREMENTS CONSIDERED AS PRECONDITIONS FOR LONG TERM OPERATION
  • 3.1. Requirements of the regulatory body
  • 3.2. Safety improvements
• 4. NATIONAL REQUIREMENTS AND GUIDANCE FOR THE LONG TERM OPERATION AUTHORIZATION PROCESS
  • 4.1. Approaches for the authorization of long term operation
  • 4.2. Authorization process
• 5. NATIONAL REQUIREMENTS AND GUIDANCE FOR PLANT DOCUMENTATION AND PROGRAMMES RELEVANT FOR LONG TERM OPERATION
  • 5.1. Updating the final safety analysis report
  • 5.2. Plant configuration management
  • 5.3. Management of modifications
  • 5.4. Design basis documentation
  • 5.5. Record keeping and documentation
  • 5.6. Plant programmes
    • 5.6.1. Maintenance
    • 5.6.2. Equipment qualification
    • 5.6.3. In-service inspection
    • 5.6.4. Surveillance
    • 5.6.5. Water chemistry
    • 5.6.6. Corrective action programme
  • 5.7. Additional plant programmes
• 6. NATIONAL REQUIREMENTS AND GUIDES FOR AGEING MANAGEMENT FOR LONG TERM OPERATION
  • 6.1. Organizational arrangements
  • 6.2. Scope setting for long term operation
  • 6.3. Ageing management programmes
  • 6.4. Ageing management review
  • 6.5. Revalidation of time limited ageing analyses
  • 6.6. Management of technological obsolescence
• 7. PERIODIC SAFETY REVIEW WITH RESPECT TO LONG TERM OPERATION
• 8. PREPARATION OF THE REGULATORY BODY FOR LONG TERM OPERATION PROGRAMME REVIEW
  • 8.1. General considerations
  • 8.2. Development and provision of regulations and guides
  • 8.3. Training of staff
  • 8.4. Internal processes, preparation for long term operation programme oversight, review and assessment, and authorization
  • 8.5. Specific preparation of regulatory bodies reviewing the periodic safety review for long term operation
• 9. OVERSIGHT OF LONG TERM OPERATION PROGRAMME PREPARATION AND IMPLEMENTATION
  • 9.1. Introduction
  • 9.2. Review of scope setting for structures, systems and components for long term operation and ageing management evaluation
  • 9.3. Regulatory review of plant programmes
    • 9.3.1. Review of maintenance programme
    • 9.3.2. Review of equipment qualification programme
    • 9.3.3. Review of in-service inspection programme
    • 9.3.4. Review of surveillance programme
    • 9.3.5. Review of water chemistry programme
    • 9.3.6. Review of corrective action programme
  • 9.4. Regulatory review of ageing management programmes and ageing management review
  • 9.5. Regulatory review of time limited ageing analysis revalidation
    • 9.5.1. Review of identification of time limited ageing analyses for definition of the long term operation programme
    • 9.5.2. Review of revalidation of time limited ageing analyses in the long term operation programme
  • 9.6. Review of technological obsolescence programme
  • 9.7. Review of periodic safety review for long term operation
  • 9.8. Documentation of oversight
  • 9.9. Management of regulatory findings
• 10. SPECIFIC ACTIVITIES OF THE REGULATORY BODY DURING IMPLEMENTATION OF LONG TERM OPERATION
• REFERENCES
• ABBREVIATIONS
• CONTRIBUTORS TO DRAFTING AND REVIEW