Progress on Pellet–Cladding Interaction and Stress Corrosion Cracking

Provides an overview of pellet-cladding interaction/stress corrosion cracking (PCI/SCC) and reports on the progress made since the early 2000s, based on presentations and discussions at a related IAEA technical meeting held in October 2019.

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Flexible operation and related power changes can have a direct impact on fuel integrity through pellet–cladding interaction/stress corrosion cracking (PCI/SCC) phenomena, which could lead to fuel failures in certain conditions. For some anticipated operational occurrences that affect fuel with small PCI/SCC margins, the fuel failures caused by PCI/SCC cannot be assumed to be benign, and a significant radiological source term may be generated. This publication provides an overview of PCI/SCC studies and reports on the progress made since the early 2000s, based on presentations and discussions at a related IAEA technical meeting held in October 2019.