Written for use by operating organizations of nuclear power plants and regulatory bodies, this Safety Guide provides specific recommendations on maintenance, testing, surveillance and inspection to ensure that the levels of reliability and availability of all structures, systems and components important to safety remain in accordance with the assumptions and intent of the design, and also that the safety of the plant is not adversely affected after the commencement of operation. The publication covers the establishment and implementation of preventive and corrective maintenance programs; testing surveillance and inspection; the repair of defective plant equipment; the provision of related facilities and equipment; procurement; and generating and retaining records of maintenance activities.

• 1. INTRODUCTION
  • Background
  • Objective
  • Scope
  • Structure
• 2. MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION PROGRAMMES AT NUCLEAR POWER PLANTS
  • Maintenance
    • Types of maintenance
    • Systematic approach to maintenance
  • Surveillance
  • Inspection
  • Testing
  • Interrelationship between maintenance, testing, surveillance and inspection
• 3. RESPONSIBILITIES FOR MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION ACTIVITIES AT NUCLEAR POWER PLANTS
  • The operating organization
  • Contractors
  • Other organizations, including designers and manufacturers
  • Coordination between different organizations
• 4. ORGANIZATIONAL ASPECTS OF MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION ACTIVITIES AT NUCLEAR POWER PLANTS
  • Organizational structure
  • Planning of maintenance, testing, surveillance and inspection activities
  • Administrative procedures for maintenance, testing, surveillance and inspection activities
  • Application of the management system to maintenance, testing, surveillance and inspection activities
  • Qualification and training of personnel
• 5. IMPLEMENTATION OF PROGRAMMES OF MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION ACTIVITIES
  • Procedures for implementation of maintenance, testing, surveillance and inspection activities
  • Work planning and control
  • Human performance
  • Outage management
  • Foreign material exclusion programme
  • Coordination and interfaces between different groups of personnel
  • Returning equipment to service following maintenance, testing, surveillance and inspection activities
  • Review of programmes of maintenance, testing, surveillance and inspection activities
• 6. ANALYSIS OF RESULTS FROM MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION ACTIVITIES, AND FEEDBACK OF EXPERIENCE
  • Records and reports of maintenance, testing, surveillance and inspection activities
  • Evaluation of results from maintenance, testing, surveillance and inspection activities and implementation of corrective actions
  • Feedback of experience from maintenance, testing, surveillance and inspection activities
• 7. AREAS IN WHICH SPECIAL CONSIDERATIONS APPLY FOR MAINTENANCE, TESTING, SURVEILLANCE AND INSPECTION ACTIVITIES
  • Structures, systems and components for accident conditions
  • Equipment qualification
  • Ageing management
  • Plants designed to earlier standards
  • Computer based systems important to safety
• 8. ADDITIONAL CONSIDERATIONS SPECIFIC TO MAINTENANCE
  • Prioritization of maintenance activities by safety significance
  • Maintenance facilities
    • Workshop facilities
    • Facilities for maintenance of radioactive and/or contaminated items
    • Decontamination facilities
    • Other facilities, tools and equipment
  • Spare parts and stores
    • Receipt of consumables, spare parts and components
    • Procurement of consumables, spare parts and components
    • Storage of consumables, spare parts and components
    • Issuing of stored items
  • Repair and replacement
    • Corrective maintenance
    • Replacement of defective items
    • Repair of defective items
  • Post-maintenance testing
• 9. ADDITIONAL CONSIDERATIONS SPECIFIC TO SURVEILLANCE
  • Surveillance programme
  • Surveillance of the integrity of barriers
  • Pressure testing and leakage testing
  • Surveillance of safety systems
  • Surveillance of other items important to safety
  • Frequency and extent of surveillance activities
  • Surveillance methods
    • Monitoring
    • Instrument checks
    • Verification of calibration and response times
  • Surveillance testing
    • Special tests
    • Test equipment
  • Documentation and records of surveillance activities
• 10. ADDITIONAL CONSIDERATIONS SPECIFIC TO INSPECTION
  • Inspection programme
  • The extent of inspection activities
  • Frequency of inspection activities
  • Methods and techniques of inspection
    • Visual inspection
    • Surface inspection
    • Volumetric inspection
    • Alternative methods of inspection
  • Equipment for inspection activities
  • Qualification of non-destructive testing systems used for inspection activities
  • Evaluation of the results of inspections
  • Documentation and records of inspections
• REFERENCES
• CONTRIBUTORS TO DRAFTING AND REVIEW