Abstract: In this paper, some research activities performed by authors on the Electromagnetic Vondestructive Evaluation (ENDE) for materials and structures of nuclear and other industries are ntroduced. The major contents includes, theoretical and experimental studies on NDT of ultra-li ght material and structures, NDT methods for Thermal Barrier Coating (TBC) inspection, improvement en quantitative NDT method of Stress Corrosio n Crack (SCC), new inspection method for material legradation etc. Research me...
英字タイトル:
Introduction of Some Researches on Electromagnetic NDT

Abstract: In nuclear power plants (NPPs), due to flow accelerated corrosion (FAC) and liquid droplet impingement (LDI) of the coolant inside the pipe, there may happen local wall thinning defects on the inner surface of a pipe. Concerning the material of pipes, there are mainly two types, low-carbon steel and stainless steel. In this paper, the feas ibility of quantitative nondestructive evaluation (QNDE) to wall thinning in stainless steel pipes using pulsed eddy current testing (PECT) method is discussed...
英字タイトル:
Quantitative NDE of pipe wall thinning using pulsed eddy current testing method

This paper evaluates the applicability of eddy current inversion techniques to the sizing of defects in Inconel welds with rough surfaces. For this purpose, a plate Inconel weld specimen, which models the welding of a stub tube in a boiling water nuclear reactor, is fabricated, and artificial notches machined into the specimen. Eddy current inspections using six probes in weld inspection evaluated. It is revealed that if suitable probes are applied, an Inconel weld does not provide large noise signals in ed...
英字タイトル:
Applicability of eddy current inversion techniques to the sizing of defects in Inconel welds of BWR internals

Abstract: This study evaluates the applicability of eddy current testing to the detection and sizing of fatigue cracks embedded in Inconel weld overlay. Welded plate specimens, which model head penetration welds and their weld overlay, are fabricated, and fatigue cracks are artificially introduced into the specimens. Eddy current inspections are performed using a uniform eddy current probe driven with 10 kH z, and all of the fatigue cracks are detected with clear signals. Subsequent numerical inversions ...
英字タイトル:
Detection of embedded fatigue cracks in weld overlay and evaluation of minimum thickness of the weld by means of eddy current testing

study evaluates the probability of the errors in evaluation of length and depth of ly current testing signals measured in inspections of a steam g enerator tubes in lants. Numerous numerical simulations are performed to establish database e number of defect profiles and corresponding eddy cur rent signals; then the or is calculated as a function of the difference in signals using the databases. is study clarify that the eddy current inv ersion in the configuration is not so Abstract This study evaluates t...
英字タイトル:
Probabilistic Evaluation of Eddy Current Inverse Analyses