Preprint Article Version 1 This version not peer reviewed

Evaluation of Interface Defects for Inaccessible Reactor Shrink Fit Nozzle Weld by Ultrasonic Wave

Version 1 : Received: 12 January 2017 / Approved: 13 January 2017 / Online: 13 January 2017 (10:01:23 CET)

A peer-reviewed article of this Preprint also exists.

Lee, J.; Cho, Y. Evaluation of Interface Defects in Inaccessible Reactor Shrink Fit Nozzle Welds Using Ultrasonic Waves. Energies 2017, 10, 589. Lee, J.; Cho, Y. Evaluation of Interface Defects in Inaccessible Reactor Shrink Fit Nozzle Welds Using Ultrasonic Waves. Energies 2017, 10, 589.

Journal reference: Energies 2017, 10, 589
DOI: 10.3390/en10050589

Abstract

An effective method to inspect inaccessible nuclear power facility by interface wave which propagate along the shrink fit boundary of reactor head is proposed in this study. Reactor head is relatively thick to inspect from the outside of reactor by conventional ultrasonic testing. The proposed interface wave can propagate a long distance from the fixed transducer position. The inside of nuclear reactor is limited to access due to the high radiation, so transducers are located at outside of nuclear facility and interface wave propagates into the nuclear reactor for defect detection. The numerical simulation and experiments were carried out to validate the effectiveness of the proposed interface wave inspection method. Various defect cases simulating field failures are also presented with satisfactory detectability by the proposed technique with the features for defect classification.

Subject Areas

nuclear facility; ultrasonic interface wave; defect detection; nondestructive testing; finite element method; inaccessible nozzle

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