Technical Visit to the Energy Transformation Research Laboratory
Introduction to the CODAP Meeting
On September 16-17, 2025, the NEA Component Operational Experience, Degradation and Ageing Programme (CODAP) Management Board convened in Tokyo, Japan. This event marked an important gathering for industry professionals, bringing together experts and representatives from various nuclear utilities, regulatory bodies, and technical support organizations worldwide. The primary aim was to share insights from operational experiences and engage in dynamic discussions about future initiatives in nuclear safety.
Key Themes Explored
In the aftermath of the meeting, an enriching workshop was held that delved into several significant topics concerning nuclear power plant operations. Attendees engaged deeply with the following key themes:
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Stress Corrosion Cracking (SCC): One of the vital discussions centered on SCC, a persistent issue affecting the integrity of nuclear power plants. Experts shared current research findings and measures being taken to mitigate risks associated with this phenomenon.
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Extended Shutdowns and Restart Management: The challenges of managing extended shutdown periods were another focal point. Discussions revolved around strategies for effectively handling equipment inspections, maintenance schedules, and ensuring safety during the restart phases.
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CODAP Database Application: Participants also addressed the utilization of the CODAP database, aimed at enhancing the collective knowledge on ageing mechanisms and operational experiences. The importance of data sharing in fostering a more profound understanding of plant degradation processes was highlighted.
Visit to CRIEPI
Following the workshop, members of the CODAP Management Board had the opportunity to visit the Energy Transformation Research Laboratory, a division of the Central Research Institute of Electric Power Industry (CRIEPI). This visit was instrumental in showcasing Japan’s commitment to advancing nuclear technology and safety measures.
Facilities and Equipment
During the tour, participants explored several state-of-the-art testing and research facilities, which included:
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Nondestructive Examination Equipment: This facility specialized in inspecting materials without causing any damage, an essential process in evaluating the structural integrity of nuclear components.
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Pipe Wall Thinning Test Facilities: These facilities focused on studying the effects of corrosion on pipe walls, allowing researchers to gather vital data that informs maintenance and safety protocols.
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Fluid Leakage Experiment Facility: Here, experiments were conducted to better understand leakage dynamics in high-pressure environments, a critical factor in ensuring containment and environmental safety.
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SCC Testing Facility for High-Temperature Water Environments: This facility was dedicated to examining the behaviour of materials under conditions similar to those found in actual reactor environments, providing invaluable insights into how stress corrosion might manifest and how it can be mitigated.
Engaging Discussions
The visit served not just as a tour but as an interactive session where members engaged in active dialogues with CRIEPI researchers. This exchange of ideas contributed to a richer understanding of Japan’s cutting-edge capabilities in nuclear safety research. Experts shared their insights, discussing ongoing initiatives and collaboration opportunities that could benefit global nuclear safety efforts.
Further Resources
For those interested in diving deeper into the discussions and findings presented by the CODAP Management Board and the insights gained from the technical visit, detailed reports and additional information can be found on the CODAP web page.
Workshop participants
This visit and the associated discussions underscore the importance of international collaboration in addressing the critical challenges facing nuclear power today. The insights gathered from such interactions are invaluable, as they pave the way for improved safety protocols and technology advancements within the sector.