Pellet Cladding Interaction, PCI, in PWRs/VVERs/BWRs (ZIRAT30/IZNA25)
The Special Topic Report on PCI-SCC provides a comprehensive state-of-the-art review of Pellet-Cladding Interaction assisted by Stress Corrosion Cracking (PCI-SCC), one of the most important fuel reliability and operational flexibility challenges in modern nuclear power plants. The report consolidates decades of international R&D, operating experience, experimental results, and recent advances in modeling and fuel design related to PCI-SCC.
The report covers the fundamental mechanisms behind PCI-SCC, laboratory testing techniques, in-reactor experience, fuel and cladding design improvements, advanced modeling approaches, and operational methodologies for flexible power operation and load-following conditions. Special attention is given to modern fuel designs, fuel conditioning and deconditioning strategies, Accident Tolerant Fuel (ATF) developments, and the increasing importance of PCI-SCC under evolving grid demands and extended reduced power operation (ERPO).
The report also highlights recent progress in mechanistic understanding, post-irradiation examination techniques, simulation tools, manufacturing quality improvements, and operational guidelines used internationally to manage PCI-SCC risks.
The report provides utilities, fuel vendors, regulators, and technical specialists with an up-to-date technical reference on PCI-SCC, combining operating experience, recent research, advanced modelling developments, and practical operational guidance to support improved fuel reliability, operational flexibility, and informed decision-making for current and future reactor operation.
