CANDU reactors contain several hundred fuel channels. Each fuel channel comprises a pressure tube, a calandria tube, end fittings, and spacers. They contain the fuel bundles and the primary coolant (heavy water) and as such are the heart of the reactor. During regular nuclear facility operation, the pressure tubes are exposed to high temperatures, high pressures, and intense radiation, which can cause them to deteriorate. CANDU operators must regularly monitor the condition of pressure tubes to ensure that they meet operational fitness standards. Subtle changes in shape, state of material properties, and the appearance of flaws must all be considered in establishing if they remain fit-for-purpose.

We are the industry leader in fuel channel engineering support and fuel channel fitness-for-service assessments, delivering a complete range of operational, lifecycle management, and refurbishment support to CANDU operators. Our team of experts have hundreds of years of combined experience that have led to the development of fuel channel fitness-for-service and lifecycle management practices that have been adopted across the entire industry.

Through our broad-based station support activities, proven leadership in research and development, and the development of new methodologies, we have maintained a keen awareness of current technical issues and regulatory sensitivities.

This diverse combination of experience and expertise has been instrumental in extending fuel channel life well beyond the initial conservative design limits.

Why Us?

  • Industry Leader

    We are the industry leader for pressure tube integrity assessments and fuel channel engineering support, providing the peer-reviewed evaluations that enable the ongoing safe operation of national and international CANDU facilities.

  • Unique Abilities

    As the developers, custodians, and sole users of industry-leading software tools we are uniquely able to carry out probabilistic evaluations of fracture protection, understand degradation mechanisms related to flaws, and complete leak-before-break (LBB) assessments.

  • Keeping CANDU Plants Operating

    In the early 2000's we delivered a package of innovations that dispositioned the arising challenge of hydrogen-induced embrittlement enabling the CANDU fleet to continue operating.

  • Operational Experience

    Many of our seasoned experts have spent years in former utility roles, where they were responsible for fuel channel lifecycle management and fitness-for-service programs.

  • Reputation

    With 110 planned unit outages under our belt, we have developed a reputation for consistently delivering accurate fitness-for-service assessments to meet critical path restart timelines and regulatory commitments.

  • All Fuel Channel Work

    Nuclear facilities rely on us to assist them with their fuel channel lifecycle management planning documents, to perform their component integrity assessments, and to assist with their regulatory submissions.