In recent decades, the number of IAEA Member States planning to extend the operation of their nuclear power plants (NPPs) beyond the time frame originally anticipated has steadily increased. These decisions have been influenced by the significant economic advantages offered by the long term operation (LTO) of existing NPPs. This Safety Report complements IAEA Safety Standards Series Nos SSR-2/2 (Rev. 1), Safety of Nuclear Power Plants: Commissioning and Operation, and SSG-48, Ageing Management and Development of a Programme for Long Term Operation of Nuclear Power Plants. It provides information on selected topics from the latter, and specifically, it addresses data collection and record keeping, scope setting for structures, systems and components, plant programmes, corrective action programmes, and documentation of ageing management and LTO assessment. The publication focuses on NPPs throughout their lifetime, including operation beyond the time frame originally established for their operation and decommissioning, while considering the different reactor designs that exist around the world. It is also relevant for facilities for spent fuel storage and radioactive waste management at NPPs. It may also be used as a basis for managing the ageing of other nuclear installations and for radioactive waste management facilities. This Safety Report is intended to provide information for operating organizations but may be also used by regulatory bodies.

• 1. INTRODUCTION
  • 1.1. Background
  • 1.2. Objective
  • 1.3. Scope
  • 1.4. Structure
• 2. DATA COLLECTION AND RECORD KEEPING
  • 2.1. General considerations
  • 2.2. Data collection and record keeping system
  • 2.3. Data for ageing management and long term operation
• 3. SCOPE SETTING
  • 3.1. Interpretation of scope setting criteria
    • 3.1.1. Criterion A
    • 3.1.2. Criterion B
    • 3.1.3. Criterion C
  • 3.2. Application of scope setting criteria
    • 3.2.1. Team creation
    • 3.2.2. Use of safety classification
    • 3.2.3. Boundaries
    • 3.2.4. Defining active and passive functions
    • 3.2.5. Scope setting process
    • 3.2.6. Walkdowns to ensure completeness
    • 3.2.7. Structures, systems and components excluded from the scope
  • 3.3. Consistency check
  • 3.4. Commodity groups
• 4. REVIEW AND IMPROVEMENT OF PLANT PROGRAMMES
  • 4.1. General information for review of plant programmes
  • 4.2. Maintenance programme
    • 4.2.1. Scope
    • 4.2.2. Preventive actions
    • 4.2.3. Detection of ageing effects
    • 4.2.4. Monitoring and trending
    • 4.2.5. Mitigation
    • 4.2.6. Acceptance criteria
    • 4.2.7. Corrective actions
    • 4.2.8. Operating experience feedback and feedback of R&D results
    • 4.2.9. Quality management
  • 4.3. Equipment qualification programme
    • 4.3.1. Scope
    • 4.3.2. Preventive actions
    • 4.3.3. Detection of ageing effects
    • 4.3.4. Monitoring and trending
    • 4.3.5. Mitigation
    • 4.3.6. Acceptance criteria
    • 4.3.7. Corrective actions
    • 4.3.8. Operating experience feedback and feedback of R&D results
    • 4.3.9. Quality management
  • 4.4. In-service inspection programme
    • 4.4.1. Scope
    • 4.4.2. Preventive actions
    • 4.4.3. Detection of ageing effects
    • 4.4.4. Monitoring and trending
    • 4.4.5. Mitigation
    • 4.4.6. Acceptance criteria
    • 4.4.7. Corrective actions
    • 4.4.8. Operating experience feedback and feedback of R&D results
    • 4.4.9. Quality management
  • 4.5. Surveillance programme
    • 4.5.1. Scope
    • 4.5.2. Preventive actions
    • 4.5.3. Detection of ageing effects
    • 4.5.4. Monitoring and trending
    • 4.5.5. Mitigation
    • 4.5.6. Acceptance criteria
    • 4.5.7. Corrective actions
    • 4.5.8. Operating experience feedback and feedback of R&D results
    • 4.5.9. Quality management
  • 4.6. Water chemistry programme
    • 4.6.1. Scope
    • 4.6.2. Preventive actions
    • 4.6.3. Detection of ageing effects
    • 4.6.4. Monitoring and trending
    • 4.6.5. Mitigation
    • 4.6.6. Acceptance criteria
    • 4.6.7. Corrective actions
    • 4.6.8. Operating experience feedback and feedback of R&D results
    • 4.6.9. Quality management
• 5. CORRECTIVE ACTION PROGRAMME
• 6. DOCUMENTATION OF AGEING MANAGEMENT AND LONG TERM OPERATION
  • 6.1. Documentation of plant level ageing management programme
  • 6.2. Safety analysis report and other licensing documentation
  • 6.3. Documentation of plant programmes for ageing management
  • 6.4. Documentation of the programme for long term operation
  • 6.5. Documentation of the scope setting methodology and results
  • 6.6. Documentation of ageing management review methodology and results
  • 6.7. Documentation of ageing management programmes
  • 6.8. Documentation of ageing management implementation
  • 6.9. Documentation of identification and revalidation of time limited ageing analyses for long term operation
• REFERENCES
• Annex I EXAMPLES OF THE CONTENTS OF DATA COLLECTION AND RECORD KEEPING SYSTEMS
• Annex II EXAMPLES OF REVIEW AND IMPROVEMENT OF PLANT PROGRAMMES RELEVANT TO AGEING MANAGEMENT AND LONG TERM OPERATION
• Annex III EXAMPLE OF A CORRECTIVE ACTION PROGRAMME
• Annex IV EXAMPLES OF COMMODITY GROUPING FOR EACH TECHNICAL AREA
• ABBREVIATIONS
• CONTRIBUTORS TO DRAFTING AND REVIEW