Evolution of Aging Assessment Methodologies
9th International Conference on CANDU® Maintenance - 2011 December 04-06

Presented at:
9th International Conference on CANDU® Maintenance
2011 December 04-06
Toronto, Canada
Session Title:
Fitness for Service Session C3

Richard Dam (Candu Energy Inc.)
Ralf Gold (Candu Energy Inc.)
Laurie McCrea (Candu Energy Inc.)


Under the influence of organizations like the IAEA and INPO the expectations of the regulator and plant operators alike are driving the evolution of aging assessment methodologies.  The key result is that these assessments need to be executed more efficiently while supporting risk informed thinking within a living process. 

Some recent trends impacting aging assessments include new standards from the regulator requiring more frequent updates of aging assessments (RD-334), and broader component coverage driven by equipment reliability program demands (INPO AP-913).  These trends point to the need to be able to do aging assessment more efficiently, and to manage the configuration. Some of the challenges include increasing efficiency while maintaining completeness and minimizing error,  employing a systematic, well defined approach while maintaining the flexibility to apply the right level of effort to achieve desired results, and in particular, assuring that Aging Related Degradation Mechanisms (ARDMs) are sufficiently addressed. 

Meeting these needs creates a natural synergy with the Preventive Maintenance living program and therefore lends itself to a more integrated approach.  To support this program, the SYSTMSTM software has been enhanced to accommodate for the various facets of an integrated program while meeting the needs described above.  The systematic processes in SYSTMSTM are built with the vision of supporting risk-informed decision making as part of a larger risk-based functional tools suite.

This paper intends to show how the utilities can benefit from the cost savings associated with increased assessment efficiency, and utilizing Candu Energy Inc.’s CANDU®-specific knowledge-base and experience in aging assessment to get it right the first time.

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