11th International Conference on CANDU® Maintenance and Nuclear Components - 2017 Oct. 01-04

Presented at:
11th International Conference on CANDU® Maintenance and Nuclear Components
2017 Oct. 01-04
Toronto, ON Canada
Session Title:
Plenary 3A: Proactively Managing Obsolescence

P. McLean (Kinectrics Inc.)


The methodology of Reverse Engineering (RE) obsolete components is used to obtain a like for like replacement component when the existing component is no longer available for the original equipment manufacturer, and the cost / effort of a modification is not desired.

The main objectives of the RE process is to provide a replacement component that can be seamless installed into the parent system without the need to modify the system, revise the operating and maintenance procedures, or retrain the operators. The replacement component should be compatible with all other components in the system, fit into the existing panel cut-out, be supplied with all required mounting brackets / retrofit kits, utilize all existing electrical / process connections and provide a similar appearance to the legacy unit from a human factors perspective.

Based on our experience with Reverse Engineering projects the majority of projects fail due to inadequate technical specifications and not understanding the design requirement delta.

From our understanding and experience of the common pit-falls of the reverse engineering process, our approach is based on designing and qualifying the replace component to a set of critical characteristics for design derived from the component’s safety function, FMEA (Failure Mode Effects Analysis), legacy OEM product literature, and the customer’s specifications. The critical characterises are then review against the legacy technology employed in the obsolete component, the design requirements delta, available OPEX and the latest industry technology to derive a solution that will yield the highest reliability and value.

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