Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds
Flaws at dissimilar metal welds (DMWs), such as reactor coolant systems components, Control Rod Drive Mechanism (CRDM), Bottom Mounted Instrumentation (BMI) etc., in nuclear power plants have been found. Notably, primary water stress corrosion cracking (PWSCC) in the DMWs could cause significant rel...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573315002235 |
| _version_ | 1819274792371486720 |
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| author | Hun-Hee Kim Hak-Joon Kim Sung-Jin Song Kyung-Cho Kim Yong-Buem Kim |
| author_facet | Hun-Hee Kim Hak-Joon Kim Sung-Jin Song Kyung-Cho Kim Yong-Buem Kim |
| author_sort | Hun-Hee Kim |
| collection | DOAJ |
| description | Flaws at dissimilar metal welds (DMWs), such as reactor coolant systems components, Control Rod Drive Mechanism (CRDM), Bottom Mounted Instrumentation (BMI) etc., in nuclear power plants have been found. Notably, primary water stress corrosion cracking (PWSCC) in the DMWs could cause significant reliability problems at nuclear power plants. Therefore, phased array ultrasound is widely used for inspecting surface break cracks and stress corrosion cracks in DMWs. However, inspection of DMWs using phased array ultrasound has a relatively low probability of detection of cracks, because the crystalline structure of welds causes distortion and splitting of the ultrasonic beams which propagates anisotropic medium. Therefore, advanced evaluation techniques of phased array ultrasound are needed for improvement in the probability of detection of flaws in DMWs. Thus, in this study, an investigation of focusing and steering phased array ultrasound in DMWs was carried out using a time reversal technique, and an adaptive focusing technique based on finite element method (FEM) simulation. Also, evaluation of focusing performance of three different focusing techniques was performed by comparing amplitude of phased array ultrasonic signals scattered from the targeted flaw with three different time delays. |
| first_indexed | 2024-12-23T23:14:03Z |
| format | Article |
| id | doaj.art-5f52fbf895f64c709f1afb18a3f3ffca |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-23T23:14:03Z |
| publishDate | 2016-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-5f52fbf895f64c709f1afb18a3f3ffca2022-12-21T17:26:34ZengElsevierNuclear Engineering and Technology1738-57332016-02-0148122823510.1016/j.net.2015.10.011Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal WeldsHun-Hee Kim0Hak-Joon Kim1Sung-Jin Song2Kyung-Cho Kim3Yong-Buem Kim4Doosan Heavy Industries & Construction Co, Changwon 642-792, South KoreaSchool of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, South KoreaSchool of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, South KoreaKorea Institute of Nuclear Safety, Daejeon 305-338, South KoreaKorea Institute of Nuclear Safety, Daejeon 305-338, South KoreaFlaws at dissimilar metal welds (DMWs), such as reactor coolant systems components, Control Rod Drive Mechanism (CRDM), Bottom Mounted Instrumentation (BMI) etc., in nuclear power plants have been found. Notably, primary water stress corrosion cracking (PWSCC) in the DMWs could cause significant reliability problems at nuclear power plants. Therefore, phased array ultrasound is widely used for inspecting surface break cracks and stress corrosion cracks in DMWs. However, inspection of DMWs using phased array ultrasound has a relatively low probability of detection of cracks, because the crystalline structure of welds causes distortion and splitting of the ultrasonic beams which propagates anisotropic medium. Therefore, advanced evaluation techniques of phased array ultrasound are needed for improvement in the probability of detection of flaws in DMWs. Thus, in this study, an investigation of focusing and steering phased array ultrasound in DMWs was carried out using a time reversal technique, and an adaptive focusing technique based on finite element method (FEM) simulation. Also, evaluation of focusing performance of three different focusing techniques was performed by comparing amplitude of phased array ultrasonic signals scattered from the targeted flaw with three different time delays.http://www.sciencedirect.com/science/article/pii/S1738573315002235Dissimilar Metal WeldsFocusing UltrasoundPhased Array Ultrasound |
| spellingShingle | Hun-Hee Kim Hak-Joon Kim Sung-Jin Song Kyung-Cho Kim Yong-Buem Kim Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds Nuclear Engineering and Technology Dissimilar Metal Welds Focusing Ultrasound Phased Array Ultrasound |
| title | Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds |
| title_full | Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds |
| title_fullStr | Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds |
| title_full_unstemmed | Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds |
| title_short | Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds |
| title_sort | simulation based investigation of focusing phased array ultrasound in dissimilar metal welds |
| topic | Dissimilar Metal Welds Focusing Ultrasound Phased Array Ultrasound |
| url | http://www.sciencedirect.com/science/article/pii/S1738573315002235 |
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