第9回
交流励磁による磁束漏洩法を用いた配管減肉評価の基礎検討
著者:
菊池 弘昭,Hiroaki KIKUCHI,佐藤 界斗,Kaito SATO,清水 勇,Isamu SHIMIZU
発刊日:
公開日:
キーワードタグ:
Abstract This paper investigated a feasibility of magnetic flux leakage (MFL) method using ac excitation for a nondestructive evaluation of wall thinning in nuclear power plants. Usually , MFL method uses dc field for exciting specimens, and only intensity of magnetic flux density is evaluated. Contrary, when alternating current is used for magnetizing specimens, not on ly amplitude of magnetic flux density but also phase difference is available. Therefore an evaluation with higher accuracy is expected. He...
英字タイトル:
Evaluation of wall thinning by MFL method using ac excitation
第10回
磁束漏洩法の補強板下配管減肉評価への適用性の基礎検討
著者:
菊池 弘昭,Hiroaki KIKUCHI,佐藤 界斗,Kaito SATO,清水 勇,Isamu SHIMIZU
発刊日:
公開日:
キーワードタグ:
Basic study on applying magnetic flux leakage (MFL) method using ac excitation to a nondestructive evaluation of wall thinning occurred under reinforcing plates in nuclear power plants were performed. Frequently, MFL method by means of dc field for exciting specimens is adopted, and only intensity of magnetic flux density is evaluated. On the other hand, MFL with alternating current enable us to utilize not only amplitude of magnetic flux density but also phase difference, which contributes to evaluati...
英字タイトル:
Nondestructive evaluation of wall thinning occurred under reinforced plate by MFL method
第8回
磁束漏洩法を用いた配管減肉の定点監視に関する基礎検討
著者:
佐藤 界斗,Kaito SATO,清水 勇,Isamu SHIMIZU,菊池 弘昭,Hiroaki KIKUCHI
発刊日:
公開日:
キーワードタグ:
This paper describes an applicability of magnetic flux leakage (MFL) method for a nondestructive evaluation of wall thinning in nuclear power plants. Since MFL method has already be en applied to other industry field, this method should be an effective tool in nuclear power plants. Here, in order to investigate a possibility of MFL method for condition monitori ng of wall thinning, steels with slit were prepared and distribution of leakage magnetic flux was evaluated systematically using magnetic probe and...
英字タイトル:
A possibility of MFL method for condition monitoring of wall thinning
第8回
磁気計測を用いたサブミリサイズ欠陥の非破壊評価
著者:
清水 勇,Isamu SHIMIZU,佐藤 斗,Kaito SATO,菊池 弘昭,Hiroaki KIKUCHI,岩田 圭司,Keiji IWATA
発刊日:
公開日:
キーワードタグ:
NDE techniques using magnetic methods such as hysteresis loop, Barkhausen noise, magnetoacoustic emission, permeability changes are used for characterization of ferromagnetic steels and eva luation of degradation of steels. Also, magnetic flux leakage testing is used for wall thinning on the tubes in various plants. In this paper, a feasibility of those magnetic techniques for applying evaluation of small defects with sub-mm size was examined. As the results, the techniques except MFL method have no abilit...
英字タイトル:
NDE for defects with sub-mm size using magnetic techniques