caa a22 4500 606172890 CHVBK 20210128100730.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10921-015-0295-7 doi (NATIONALLICENCE)springer-10.1007/s10921-015-0295-7 Detection of Localized Damage in Water Wall Tubes of Thermal Power Plants Using GMR Sensor Array Based Magnetic Flux Leakage Technique [Elektronische Daten] [W. Singh, B. Rao, C. Mukhopadhyay, T. Jayakumar] A flexible giant magneto-resistive (GMR) sensor array based magnetic flux leakage technique has been developed for nondestructive inspection of carbon steel water wall tubes (outer diameter 64.0mm and wall thickness 6.3mm) used in a thermal power plant. Two saddle coils are used for magnetisation of the tube and a flexible GMR sensor array is used for detection of leakage fields from localized damage in the tube. 3D-nonlinear finite element modeling has been performed to optimize the magnetizing current, inter-coil spacing of the saddle coils and location of the GMR sensor array within the saddle coils. The performance of the technique has been evaluated by measuring the axial component of leakage flux from outer diameter (OD) erosion and inner diameter (ID) corrosion type flaws artificially machined on the water wall tube. Studies reveal that the proposed technique detects both OD erosion and ID corrosion damage in the water wall tubes. Springer Science+Business Media New York, 2015 Magnetic flux leakage nationallicence GMR sensor array nationallicence Finite element modeling nationallicence Water wall tube nationallicence Corrosion damage nationallicence Singh W. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut Rao B. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut Mukhopadhyay C. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut Jayakumar T. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/3(2015-09-01), 1-7 0195-9298 34:3<1 2015 34 10921 https://doi.org/10.1007/s10921-015-0295-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-015-0295-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Singh W. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut NATIONALLICENCE 700 1- Rao B. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut NATIONALLICENCE 700 1- Mukhopadhyay C. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut NATIONALLICENCE 700 1- Jayakumar T. Non-Destructive Evaluation Division, Indira Gandhi Centre for Atomic Research, 603 102, Kalpakkam, Tamil Nadu, India aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/3(2015-09-01), 1-7 0195-9298 34:3<1 2015 34 10921