| Dams


NDT technicians but are also imperative for the ability of the inspector to do accurate exams. Certifications validate technicians’ proficiency in the latest NDT equipment and methodologies, guaranteeing their capability to perform accurate inspections. In the absence of rigorous training and certification, the reliability of the exams can be questioned, potentially leading to serious consequences and safety of dams and hydraulic structures can be seriously compromised. As NDT methods advance, training must adapt to encompass changing technologies and applications of NDT, ensuring continued quality and the preservation of these essential water management systems. The value of certification extends beyond individual


expertise. Third-party organizations offering NDT training play a pivotal role in standardizing the knowledge and skills of NDT technicians across the industry. These courses provide a comprehensive framework that aligns with industry best practices and regulatory standards. Technicians who undergo such training programs not only enhance their proficiency, but also gain a broader understanding of the unique challenges posed by complex structures. Additionally, third-party organizations continuously update their curricula to reflect the latest advancements in NDT technologies, ensuring that NDT technicians remain at the forefront of their field. Third-party certifications instill a sense of trust and accountability in the NDT process. When an external body validates the competencies of technicians, it fosters confidence among stakeholders, including engineers, project managers, and regulatory authorities. This confidence is crucial, especially in the context of hydraulic structures, where even the slightest oversight can have far-reaching consequences. The importance of third-party certification courses is magnified when we consider the critical role of dams and hydraulic structures in ensuring water supply, flood control, and power generation. In the face of growing infrastructure demands, relying on certified NDT technicians becomes an indispensable part of maintaining the safety and resilience of these vital structures.


In addition to access to quality accreditation


programs, new generations of skilled inspectors can be nurtured through mentorship and apprenticeship opportunities. Collaborating with industry leaders and educational institutions creates a pathway for aspiring NDT professionals to gain hands-on experience and guidance from seasoned experts. Such collaboration fosters a continuous transfer of knowledge and expertise, raising the bar for NDT inspection practices.


Incorporating NDT training To empower structural engineers with a deeper


understanding of NDT methods, educational institutions should incorporate NDT training into their core engineering programs. By providing engineers with specialized NDT knowledge, they can better understand the complexities of specific examinations such as Ultrasonic Testing, Radiographic Testing, and Magnetic Particle Testing and their application during the design, construction, and operational phases of hydropower projects. The value of NDT is not always fully understood by


the infrastructure industry and engineers. Engineers are tasked with multifaceted responsibilities, from design and construction to ensuring the structural integrity of these facilities. Yet, the intricate nature of NDT methods and their contributions to the maintenance and longevity of hydraulic structures can sometimes be overlooked. Engineers may focus more on the tangible aspects of construction, neglecting the critical role that NDT plays in uncovering hidden flaws and defects after commissioning. Bridging this knowledge gap is pivotal. By informing engineers about the intricate nature of NDT and its ability to safeguard against unseen vulnerabilities, it is possible to equip professionals to make more informed decisions, thereby bolstering the resilience of dams and hydraulic structures in the face of ever-evolving challenges. By fostering mentorship and apprenticeship opportunities, integrating NDT education into engineering curricula, and embracing advanced NDT techniques, the hydropower industry can ensure the continued resilience and safety of these critical infrastructures. The utilization of high-quality NDT inspection at dams and hydropower projects is essential to maintain their safety and longevity. Investing in robust NDT practices allows stakeholders to mitigate risks, enhance safety measures, and extend the operational life of these critical infrastructures. The early detection of structural issues and potential failures through NDT techniques enables engineers to take proactive measures, safeguarding these vital structures. By requiring thorough NDT expertise and training, we can foster sustainable water management practices and ensure the longevity of dams and their component structures, safeguarding communities, and the environment for generations to come. With a commitment to best practices and continuous improvement, NDT inspection stands as a reliable pillar supporting the sustainable development of hydropower projects worldwide. Investing in these initiatives can elevate the quality of inspections, strengthen structural safety, and uphold the integrity of hydraulic structures.


Above: The Bonneville Unit 11 Thrust collar was a replacement of the original thrust collar from the Unit 11 Turbine. Fatigue cracking was discovered on the original collar during in-service inspections using Magnetic Particle Testing and Ultrasonic testing, a redesign and reconstruction was performed to increase fatigue life. The thrust collar is the uppermost support of vertical hydro turbines


About the author


John Pariseau is an ASNT Level III in UT, RT, MT, PT, and VT as well as an AWS Senior Certified Welding Inspector, NACE CIP Level 3, and ICC Master Special Inspector. He is the Executive Director of the National Inspection Academy, a 501(c)3 not-for-profit inspection training company specializing in Nondestructive Testing.


www.waterpowermagazine.com | October 2023 | 37


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