Enhanced CANDU 6 Design Assist Probabilistic Safety Assessment Results and Insights
34th Annual CNS Conference - 2013 June 09-12

Presented at:
34th Annual CNS Conference
2013 June 09-12
Toronto, Canada
Session Title:
Safety & Licencing 2

Keivan Torabi (Candu Energy Inc.)
Ralph Bettig (Candu Energy Inc.)
Petre Iliescu (Candu Energy Inc.)
Joel Robinson (Candu Energy Inc.)
Paul Santamaura (Candu Energy Inc.)
Bozena Skorupska (Candu Energy Inc.)
Ashok Tyagi (Candu Energy Inc.)
Imre Vencel (Candu Energy Inc.)


The Enhanced CANDU®[1] 6 (EC6) is a 700 MWe reactor, which has evolved from the well-established CANDUline of reactors, which are heavy-water moderated, and heavy-water cooled horizontal pressure tube reactors, using natural uranium fuel.  The EC6 design retains the generic CANDU design features, while incorporating innovations and state-of-the-art technologies to ensure competitiveness with other design with respect to operation, performance and economics. 

A design assist probabilistic safety assessment (PSA) was conducted during the design change phase of the project.  The purpose of the assessment was to assess internal events during at-power operation and identify the design improvements and additional features needed to comply with the latest regulatory requirements in Canada and compete with other reactor designs, internationally.

The PSA results show that the EC6 plant response to the postulated initiating events is well balanced, and the design meets its safety objectives.  This paper summarizes the results and insights gained during the development of the PSA models for at-power internal events.

[1] ® Registered trademark of Atomic Energy of Canada Ltd. (AECL) used under exclusive licence by Candu Energy Inc.

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