Enhancements of eddy current testing techniques for quantitative nondestructive testing of key structural components of nuclear power plants

2008 ◽  
Vol 238 (7) ◽  
pp. 1651-1656 ◽  
Author(s):  
Zhenmao Chen ◽  
Noritaka Yusa ◽  
Kenzo Miya
Keyword(s):  
Nondestructive Testing ◽  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Eddy Current Testing ◽  
Structural Components ◽  
Current Testing ◽  
Testing Techniques

Development of Atlas of Defects of Steam Generators Heat Exchanging Tubes of NPPs With WWER and Analysis of Testing Results

2008 ◽  
Author(s):  
Murat Bakirov ◽  
Sergei Chubarov ◽  
Nikolay Trunov
Keyword(s):  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Eddy Current Testing ◽  
Basic Method ◽  
Steam Generators ◽  
Current Testing ◽  
The World

The basic method of the operational inspection of metal of heat exchanging tubes (HET) of steam generators (SG) is eddy-current multifrequency method all over the world. The greatest distribution was received variant with eddy-current testing (ECT) by use of a bobbing probe on the Russian nuclear power plants (NPP). Tubes with the defects which a subject to plugging are defined by results of lead operational ECT over the certain algorithm. SG resource is settled and replacement is required at achievement of a limit on number of the plugged tubes [1].

Parametric Study on Determining Optimal Eddy Current Testing Method for Inspection of Steam Generator Tubes in SMART Plant

2010 ◽  
Author(s):  
Dae-Kwang Kim ◽  
Sung-Jin Han ◽  
Hak-Joon Kim ◽  
Sung-Jin Song ◽  
Yun-hang Choung
Keyword(s):  
Steam Generator ◽  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Eddy Current Testing ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Current Testing ◽  
Current Test ◽  
Testing Condition

The SMART (System-integrated Modular Advanced ReacTor) is small sized integral type pressurized water reactor designed by KAERI (Korea Atomic Energy Research Institute), Korea. But, shape of steam generator (SG) in SMART plant differs from those in operated nuclear power plants (NPPs). Especially, SG tubes in SAMRT plant is helical type with around 600 mm of innermost diameter and thickness of 2.5 mm which is thicker than general NPPs one. For providing integrity of SG tube in SMART plant, new types of ECT method are needed because eddy current testing (ECT) is one of widely adopted method for inspection of SG tubes in NPPs. Therefore, in this study, we investigate optimal conditions or parameters for detecting and evaluating of flaws in the SG tubes in SMART plant by simulation of ECT signals with various testing condition or parameter such as frequency, coil gap and etc. From the simulated ECT signals optimal eddy current test condition or parameters are proposed.

scholarly journals In-situ eddy current monitoring of structural components in nuclear power plants

2005 ◽  
Vol 17 (1/2) ◽  
pp. 68-69
Author(s):  
Takashi KASUYA ◽  
Tetsuya UCHIMOTO ◽  
Toshiyuki TAKAGI ◽  
Tetsuo SHOJI
Keyword(s):  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Structural Components ◽  
Current Monitoring

Eddy Current Monitoring Aiming at Evaluation of Crack Propagation in Structural Components of Nuclear Power Plants

2004 ◽  
Vol 2004.3 (0) ◽  
pp. 187-188
Author(s):  
Takashi KASUYA ◽  
Takeshi OKUYAMA ◽  
Hisashi ENDO ◽  
Tetsuya UCHIMOTO ◽  
Toshiyuki TAKAGI ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Structural Components ◽  
Current Monitoring

Investigation on Multifrequency Eddy Current Testing Signal Analysis for Nondestructive Inspection of Steam Generator Tubes

2006 ◽  
Vol 321-323 ◽  
pp. 460-463
Author(s):  
Hee Jun Jung ◽  
Sung Jin Song ◽  
Chang Hwan Kim ◽  
Joo Young Yoo ◽  
Young Hwan Choi ◽  
...  
Keyword(s):  
Steam Generator ◽  
Eddy Current ◽  
Nuclear Power ◽  
Power Plants ◽  
Eddy Current Testing ◽  
Transform Method ◽  
Current Testing ◽  
Testing Signal ◽  
Steam Generator Tubes ◽  
Supporting Structures

For inspection of steam generator tubes in nuclear power plants using eddy current testing, it is a very crucial task to extract the flaw signal from signals compounded by flaws and supporting structures. To perform such an important task, the multifrequency eddy current testing method is widely adopted. In this study, we explore the performance of a linear mixing technique based on the discrete cosine transform method by experiments. The results obtained using the DCT based method agree very well to those obtained by commercial software demonstrating the effectiveness of the approach.

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