New non-destructive test using electromagnetic wave 2007. 01. 08. 서경호.

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Presentation transcript:

New non-destructive test using electromagnetic wave 서경호

Contents Methods and techniques of NDT New Method Basic Theory for New Method Description of the new method Conclusion & Discussion

Methods and techniques of NDT Liquid penetrant testing (PT) Radiographic testing (RT)  Digital Radiography  Computed radiography  SCAR (Small Confined Area Radiography)  Neutron radiographic testing (NR)  Computed tomography Ultrasonic inspection (UT)  Phased array untrasonics  Time of flight diffraction untrasonics (TOFD)  Internal Rotary Inspection System (IRIS) Visual and Optical testing (VT)  Ellipsometry  Pipeline video inspection

Methods and techniques of NDT Electromagnetic testing  Eddy-Current testing  Remote field testing  Magnetic-particle inspection  Magnetic flux leakage testing  Barkhausen testing Acoustic emission testing Infrared and thermal testing Laser testing Leak testing

New Method This method can be used for crack detection of metal pipes in NPP, and furthermore it can be done very cheaply and very easily.

Basic Theory for New Method

Description of the new method

From these two equations, we can find “a” and “d” – crack size.

Conclusion & Discussion Standard non-destructive testing requires relatively heavy and large devices. Radiographic testing requires radioactive materials – this can cause environmental problems. NDT can be done very cheaply by the new method, and this can prevent possible future disaster. In NPP, most of the standard NDT method is not so easy to execute – they are restricted by the NPP environments. New method can be executed by small devices – devices for electromagnetic testing can be carried just by one hand -, and it is clean in the environmental viewpoint.