LMT recently delivered a first use application for the examination of small-bore socket welded joints using advanced Encoded Phased
Array Ultrasonic Testing (PAUT) techniques. The project initiated by LMT at the request of two nuclear clients was to develop an alternative to Radiographic Testing (RT) of these joints for Plant Life Extension (PLEX).
PAUT, unlike RT, minimizes radiological risk, is more reliable and testing can be completed faster without disruption of other refueling activities.
This first use successfully demonstrated the ability to detect flaws in the susceptible regions of the joints using PAUT. Examinations were performed successfully with no impact on refuel schedule.