Pulsed eddy currents in ferromagnetic pipes with cladding in nuclear power plants

Han, Yang; Tao, Yu-Chun; Shao, Chun-bing; Yan, Hai; Peng, Zhizhen

doi:10.1016/j.egyr.2022.05.113

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Y. Han et al, (2022), pemodelan dan simulasi pipa menggunakan modul Maxwell di ANSYS untuk mengidentifikasi cacat di bawah lift-off sebagai indikator penting untuk mengidentifikasi titik menggunakan teknologi arus Eddy pada sektor tenaga nuklir. Koil deteksi vertical dirancang untuk mensimulasikan kemampuan mendeteksi titik menggunakan arus Eddy pada cacat dasar dibawah lift-off.…”

Section: Pendahuluanunclassified

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Utami,

Yonathan

2023

teknika

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Kelaikudaraan atau airwothiness pada pesawat udara salah satunya dinyatakan dengan pemenuhan persyaratan pengujian komponen dan sistem. Non Destructive Testing (NDT) – Eddy Current merupakan salah satu pengujian umum yang dapat diaplikasikan pada komponen pesawat udara. Penelitian ini mempelajari analisis cacat permukaan logam fuselage skin Boeing 737-9 pada bagian Emergency Window menggunakan probe frequency of Eddy Current 10.000 – 500.000 Hz. Cacat permukaan logam uji menggunakan probe frequency of Eddy Current didekati dengan nilai depth of penetrants. Distribusi normal untuk data depth of penetrants permukaan logam fuselage skin Boeing 737-9 berbasis Al 2024-T3 memenuhi 99,7% dari pengamatan berada dalam 3 standar deviasi rata-rata ke arah kanan dan kiri. Nilai depth penetrant stabil pada nilai 0,200 mm, yaitu saat probe frequency of Eddy current 22.000 – 500.000 Hz. Semakin tinggi probe frequency maka nilai depth of penetrant semakin kecil. Hal ini disebabkan karena semakin tinggi probe frequency of Eddy Current maka resolusi keberhasilan dalam mendeteksi cacat dan retak permukaan logam semakin maksimum dan mempunyai sensitivtas yang tinggi.

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Section: Pendahuluanunclassified

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Utami,

Yonathan

2023

teknika

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“…If the corrosion is intensified, loss of life and property will be stimulated. At present, corrosion detection in the accessible area of the pipeline can be better solved by ultrasonic [ 9 , 10 ], magnetic flux leakage [ 11 , 12 ], eddy current [ 13 , 14 ] and other conventional detection methods. To ensure the stability and durability of the pipeline, supporting frames are set at a certain distance periodically.…”

Section: Introductionmentioning

confidence: 99%

Research on Crossing-Pipe Support Structure Defect Detection of EMAT-Excited CSH Wave

Zhou

Yue

2023

Sensors

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A circumferential shear horizontal (CSH) guide wave-detection method using a periodic permanent magnet electromagnetic acoustic transducer (PPM EMAT) was proposed to solve the defect detection located at the inside of the pipe welded by supporting structures. Firstly, a low-frequency CSH0 mode was selected to establish a three-dimensional equivalent model for the defect detection to cross the pipe support, and the ability of the CSH0 guided wave to propagate through the support and weld structure was analyzed. Then, an experiment was used for the further exploration of the influence of different sizes and types of defects on detection after using the support, as well as the ability of detection mechanism to cross different pipe structures. The results show that both the experiment and the simulation received a good detection signal at 3 mm crack defects, which proves that the method can detect the defects by crossing the welded supporting structure. At the same time, the support structure shows a greater impact on the detection of small defects than the welded structure. The research in this paper can provide ideas for guide wave detection across the support structure in the future.

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“…Além disso, é possível utilizar técnicas de modelagem por elementos finitos para simular a inspeção em tubos ferromagnéticos utilizando correntes parasitas pulsadas e avaliar o campo magnético no interior da sonda (HAN et al, 2022). Técnicas de modelagem são aplicadas em busca do aperfeiçoamento e otimização da configuração experimental (MIZUKAMI et al, 2016.…”

Section: Introductionunclassified

Analysis of PEC technique and external magnetic fields for detection of corrosion under insulation: 3D finite element model

Cortês,

Rego,

Cavalcanti

et al. 2023

CLIUM

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Metal piping in industrial plants is subject to corrosion under insulation, which reduces the wall thickness and limits service life and operating conditions. The Pulsed Eddy Current (PEC) technique can be effective in the inspection of isolated metallic materials. However, changes in magnetic permeability make its use difficult in ferromagnetic steels. In this work, we used Neodymium magnets to magnetize the material during tests with a probe. We developed a 3D finite element model to reproduce the magnetic field of the PEC probe and identify defects under insulation. Theoretical results satisfactorily matched the experimental results.

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Pulsed eddy currents in ferromagnetic pipes with cladding in nuclear power plants

Cited by 7 publications

References 5 publications

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

ANALISIS CACAT PERMUKAAN LOGAM FUSELAGE SKIN BOEING 737-9 MENGGUNAKAN PROBE FREQUENCY OF EDDY CURRENT 10.000 – 500.000 Hz

Research on Crossing-Pipe Support Structure Defect Detection of EMAT-Excited CSH Wave

Analysis of PEC technique and external magnetic fields for detection of corrosion under insulation: 3D finite element model

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