第7回
電磁超音波共鳴法による配管減肉の計測と評価
著者:
兼本 茂,Shigeru KANEMOTO,浦山 良一,Ryo-ichi URAYAMA,内一 哲哉,Tetsuya UCHIMOTO,高木 敏行,Toshiyuki TAKAGI
発刊日:
公開日:
キーワードタグ:
Electromagnetic acoustic transducer (EMAT) provides non-contacting measurements and is often applied to monitoring in gh temperature environment. One of drawbacks of EMAT is its low sensitivity and S/N ratio. One way to overcome the uwback is to introduce an Electromagnetic acoustic resonance meth od (EMAR); it has a high capability of evaluating ckness or ultrasonic velocity, and it is applied to the measurement of thickness, elastic constants, damping propertiesso on. Since the principle of the method is...
英字タイトル:
Measurement and Evaluation of Pipe Wall Thinning by Electromagnetic Acoustic Resonance
第9回
電磁超音波共鳴法を用いた配管検査技術の実施適用性の検討
著者:
浦山 良一,Ryoichi URAYAMA,高木 敏行,Toshiyuki TAKAGI,内一 哲哉,Tetsuya UCHIMOTO,兼本 茂,Shigeru KANEMOTO,大平 拓,Taku OHIRA,菊池 貴好,Takayoshi KIKUCHI
発刊日:
公開日:
キーワードタグ:
Abstract The electromagnetic acoustic resonance (EMAR) method provides accurate and stable evaluation and its capability has been demonstrated through online monitoring using a large-scale corrosion test loop in oper ation at high temperature. This study applies EMAR with the signal processing method of the superposition of n'“ compression to the thickness evaluation of piping in a nuclear power plant during shutdown. Sections of piping evaluated by EMAR include those having long-term service, where thinni...
英字タイトル:
Implementation applicability of piping inspection using electromagneticacoustic resonance
第11回
電磁超音波共鳴法を用いた配管減肉検査における底面形状の影響
著者:
浦山 良一,Ryoichi URAYAMA,ジョン マンチョル,Jeong Man Chul,原 翔一郎,Syoichiro HARA,高木 敏行,Toshiyuki TAKAGI,内一 哲哉,Tetsuya UCHIMOTO,丹治 和宏,Kazuhiro TANJI
発刊日:
公開日:
キーワードタグ:
Electromagnetic acoustic transducer (EMAT) provides non-contacting measurements and is often applied to monitoring in high temperature environment. Electromagnetic acoustic resonance method (EMAR) is transmits an ultrasonic burst wave, and the driving frequency of bust wave is swept. Then signal amplitude of each frequency is computed by the superheterodyne processing at the interval. Pulse-EMAR method is transmits an ultrasonic pulse wave propagating, but the pulse wave is not swept. Then echo waves recei...
英字タイトル:
Influence of bottom shape in the pipe wall thinning inspection using an electromagnetic acoustic resonance method
第10回
非破壊評価の観点から見た 原子力発電所機器の疲労割れ管理方法に関する考察
著者:
青木 孝行,Takayuki AOKI,高木 敏行,Toshiyuki TAKAGI
発刊日:
公開日:
キーワードタグ:
System safety is considered to secure safety in a comprehensive manner as an entire plant by multiple elemen ts serving an entire plant for a common purpose of safety and an interdependent relationship among elements. nder this concept, we considered how the scheme of fatigue crack management in nuclear power plants should b e and also considered the problems to be solved to establish the effective and efficient management system....
英字タイトル:
Conderation onHow to Manage Fatigue Cracking in Nuclear Power Plants from the viewpoint of Non-destructive Evaluation
第7回
非線形渦電流法を用いた材料劣化評価
著者:
内一 哲哉,Tetsuya UCHIMOTO,高木 敏行,Toshiyuki TAKAGI
発刊日:
公開日:
キーワードタグ:
Authors have proposed non-linear eddy current method which is a novel material characterization method foc using on the non-linearity of magnetic properties. This method can be a effective tool to evaluate materia l degradations if the micro-structure changes due to degradations link with change of magnetic properties. In this paper, some examples of its applications are reviewed together with its principle of assessment....
英字タイトル:
Nondestructive Evaluation of Material Degradation by Non-linear Eddy Current Method
第12回
高温機器モニタリングを目指した高温用電磁超音波 プローブの開発と評価
著者:
内一 哲哉,Tetsuya UCHIMOTO,高木 敏行,Toshiyuki TAKAGI,尾形 翔平,Shohei OGATA,Gerd DOBMANN
発刊日:
公開日:
キーワードタグ:
Abstract: An electromagnetic acoustic transducer (EMAT) design using an air-cored solenoid coil as a pulsed electromagnet is proposed for high-temperature non-contact monitoring, and prototype probe is evaluated through performance test in the range from room temperature to 700°C. The coil generates a biasing magnetic field that enables the device to overcome the Curie temperature limitations of conventional EMATs. Pulsed echo measurements of carbon steel are performed at high temperatures, and verify ...
英字タイトル:
Development and Evaluation of High Temperature EMAT Aiming at Monitoring of High Temperature Components