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Methods for Locating Pool Liner Leakage at Nuclear Power Plants

| 2026:1156 | Markus Nilsson, Lund university
This report evaluates practical methods for localizing leakage-relevant defects in thin stainless-steel pool liners in nuclear facilities, with particular emphasis on inspection under water.
Pool Liner Leakage at Nuclear Power Plants

A state-of-the-art review is complemented by targeted EMAT shear-horizontal guided-wave experiments, which clarify detection mechanisms and practical limitations. Based on the combined findings, Alternating Current Field Measurement (ACFM) is identified as the most promising near-term technique for locating surface-breaking cracks, with Phased Array Ultrasonic Testing (PAUT) as a complementary method for detailed characterization. The results provide an application-oriented basis for prioritizing inspection techniques and guiding future development toward more reliable leakage localization with reduced downtime.

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