Reference No: A0541

HARMONI Rod Cluster Control Assemblies (RCCA) - For PWR reactors

In the early stages of developing a wear-resistant RCCA, we performed sliding wear tests to determine the best wear treatment. These tests were conducted in the Frotteau Test Loop in France on Ion-Nitride tubes, Chrome Carbide-coated tubes, Armoloy-coated tubes (both 0.3 mils and 0.6 mils thickness) and uncoated stainless steel tubes. The tests confirmed that Ion-Nitride provided the best wear protection for both the RCCA and guide card, extending RCCA life.

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