Chapter 5
License Renewal and Aging Management for Continued Service


As of August 2011, there were 104 commercial nuclear power reactors licensed to operate in 31 states in the United States. Initial operating licenses in the United States are granted for a period of 40 years. In order to help assure an adequate energy supply, the USNRC has established a timely license renewal process and clear requirements that are needed to ensure safe plant operation for an extended plant life. The principals of license renewal and the basic requirements that address license renewal are identified as well as additional sources of guidance that can be utilized as part of the license renewal process. Aging management program inspections and operating experience related to the concrete and steel containment structures are provided. Finally, several lessons learned are provided based on containment operating experience.

  • 5.1 Introduction
  • 5.2 License Renewal Process, Safety Principles, and Regulations
  • 5.3 Guidance Documents
  • 5.4 License Renewal Inspections
  • 5.5 Operating Experience
  • References
  • Appendix 5A Monitoring and Trending of Prestressing Forces in Prestressed Concrete Containments
  • Appendix 5B Summary of Major Degradation in Containments

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