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Ageing related events at nuclear power plants

DOI: 10.4236/ns.2013.51005    6,421 Downloads   8,334 Views  

ABSTRACT

This paper presents main results of a comprehensive study performed by the European Clearinghouse on Operating Experience Feedback of NPP with the support of IRSN (Institut de S?reté Nucléaire et de Radioprotection) and GRS (Gesellschaft für Anlagen und Reaktorsi-cherheit mbH). Physical ageing mechanisms of structure, systems and components that eventually lead to ageing related systems and components failures at nuclear power plants were the main focus of this study. The analysis of ageing related events involved operating experience reported by NPP operators in France, Germany, USA and to the IAEA/NEA International Reporting system, on operating experience for the past 20 years (i.e. 1990-2009). A list of ageing related events was populated. Each ageing related event contained in the list was analyzed and results of analysis were summarized for each commodity group for which the ageing degradation appeared to be a dominant contributor or direct cause. The most common degradation mechanisms/ageing effects for each specific component/commodity group, their risk significance and consequences to the plant performance are described. This paper provides insights into ageing related operating experience as well as recommendations to deal with the physical ageing of nuclear power plant SSC important to safety.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Duchac, A. (2013) Ageing related events at nuclear power plants. Natural Science, 5, 31-37. doi: 10.4236/ns.2013.51005.

References

[1] United States Nuclear Regulatory Commission (1995) Requirements for renewal of operating licenses for nuclear power plants. Office of Nuclear Reactor Regulation, Washington DC.
[2] International Atomic Energy Agency (2003) Periodic safety review of nuclear power plants. IAEA NS-G-2.10, Vienna.
[3] Duchac, A. (2011) Topical study on ageing related events. Topical Study, European Commission Joint Research Centre, Petten.
[4] International Atomic Energy Agency (2009) Ageing management for nuclear power plants. IAEA NS-G-2.12, Vienna.
[5] United States Nuclear Regulatory Commission (2010) Generic ageing lessons learned (GALL) report. Office of Nuclear Reactor Regulation, Washington DC.

  
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