138件が見つかりました。

並び替え
第10回
WOLおよびDMW PD資格試験の実施方法について
著者:
秀 耕一郎,Koichiro HIDE,渡辺 恵司,Keiji WATANABE
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In Japan, the 1st Performance Demonstration (PD) qualification examination started in March of 2006 and was operated by the Performance Demonstration (PD) center of Central Research Institute of Electric Power Industry (CRIEPI). The first application of Japanese PD system is crack depth sizing on stainless steel piping welds. PD center is planning to start weld overlay (WOL) PD examination as a second step, and dissimilar weld (DMW) PD examination as third step. In particular, WOL PD examination includ...
英字タイトル:
The examination system for Japanese WOL and DMW PD qualification test 東海林 一 Hajime SHOHJI
第10回
き裂成長予測に基づく疲労評価法の検討
著者:
釜谷 昌幸,Masayuki KAMAYA,中村 隆夫,Takao NAKAMURA
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A fatigue damage assessment procedure based on crack growth prediction was shown, in order to quantify the risk for failure of nuclear power plant components. First, crack initiation and growth behavior during low-cycle fatigue tests was reviewed and it was shown that the fatigue life could be estimated by predicting the crack growth without considering incubation period before the crack initiation. The change in crack size with the number of cycles was obtained by using the equivalent stress intensity...
英字タイトル:
Fatigue Damage Assessment Procedure based on Crack Growth Prediction
第10回
ねじりモードガイド波を用いた複数のエルボ越え探傷の数値解析
著者:
古川 敬,Takashi FURUKAWA,山本 敏弘,Toshihiro YAMAMOTO,金原 了二,Ryouji KANEHARA,池田 隆,Takashi IKEDA
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Abstract Ultrasonic guided waves have been widely applied to the long-range inspection of straight piping. Guided waves have many wave modes with different sound velocity. So, ultrasonic testing beyond welds and elbows is very difficult to interpret testing data. This paper reports the simulation and visualization of guided wave propagation via a large-scale 3D FEM code, which has over one billion elements and parallel computing system. The prediction of torsional guided wave propagation and reflected ...
英字タイトル:
Numerical simulation of torsional-mode guided wave inspection beyond elbows
第10回
ふげん配管減肉の調査
著者:
安藤 亮介,Ryosuke ANDO,阿部 輝宜,Teruyoshi ABE,中村 孝久,Takahisa NAKAMURA
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Wall thinning of the steel piping of the secondary cooling system after long term operation using the serviced materials of “Fugen” Power Station has been investigated as a series of the evaluation of the validity and availability of the utilization of serviced materials on the research projects focused on the aging. Reliability of the wall thinning rate of the steel piping has been examined referring the previous inspection data. Besides, prediction of the wall thinning rate, rationalization of the m...
英字タイトル:
Evaluation of wall thinning of the steel piping after long term operation at “Fugen” Power Station
第10回
アキシャル溝型蒸気タービンロータの超音波探傷技術の開発
著者:
鈴木 豊,Yutaka SUZUKI,千葉 弘明,Hiroaki CHIBA,工藤 健,Takeshi KUDOU
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Refracted angle for UT of axial groove type rotor is limited with the distance of the axial direction from the sensor installation surface. High intensity detection technique changes with the refracted angle, the change may require a combination of multiple inspection techniques. For this reason, detectable distance of a double probe technique and a tip echo technique are examined. In the distance more than 35mm, refracted angle become more than 35 degrees where refracted intensity is high and the defe...
英字タイトル:
Development of Ultrasonic Testing Method for Axial Groove Type Steam Turbine Rotor
第10回
アルミニウム溶接時の溶融金属中における気泡の挙動に関する数値解析
著者:
周 楓,Qiaofeng ZHOU,小山 和晃,Kazuaki KOYAMA,宮坂 史和,Humikazu MIYASAKA,森 裕章,Hiroaki MORI
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Laser welding is one of useful methods in manufacturing processes. However, in welding processes, porosi ties sometimes occur in weld metal. Therefore, it is demanded to establish the method to predict and sup press porosities to make sound joints. Numerical simulation has been developing and become one of availa ble techniques to make it realized. Even so it’s still very difficult to predict its formation with comp te accuracy. In this study, numerical analysis to simulate the behavior of bubbles moving i...
英字タイトル:
Numerical Simulation of Bubble Behavior in Molten Metal of Aluminum during Laser Welding Process
第10回
アレイ型プローブを用いた SG 二次側管支持板監視手法の開発
著者:
小橋 優司,Yuji KOHASHI,七田 知紀,Tomonori SHICHIDA,川瀬 直人,Naoto KAWASE,松浦 貴之,Takayuki MATSUURA,川田 かよ子,Kayoko KAWATA
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Array ECT probe called Intelligent ECT probe (I-Probe) has a capability to inspect tubes of Steam Generator (SG) more productively and more accurately than conventional probes. It has been applied as full length inspection in Japan since 2003 and there is much field experience to date. On the other hand, a phenomenon in SG secondary side is known that scale deposits on the clog holes of quatrefoil type tube support plate(TSP). Water level oscillation of secondary side caused by excessive blockage of sc...
英字タイトル:
Development of Monitoring Method for SG Secondary Side Tube Support Plate Using Array Probe
第10回
オリフィス下流での減肉速度測定
著者:
中村 晶,Akira NAKAMURA,歌野原 陽一,Yoichi UTANOHARA,村瀬 道雄,Michio MURASE,釜堀 孝一,Koichi KAMAHORI,長屋 行則,Yukinori NAGAYA
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In this study, the corrosion rate on the pipe wall downstream from an orifice was measured in order to validate the evaluation code for flow-accelerated corrosion (FAC). Three orifices with aperture ratios . = 0.62, 0.50, 0.41 was used in a test section with 50mm inner pipe diameter. The flow velocity was changed during the test to investigate the effect of mean cross-sectional flow velocity on the FAC rate. The water conditions were 150 degree centigrade, about 0.1ppb of dissolved oxygen concentration...
英字タイトル:
FAC Rate Measurement downstream from an Orifice
第10回
オーステナイト系ステンレス鋼照射ブロック材を用いた照射下ミクロ組織の非破壊検査技術開発
著者:
江藤 淳二,Junji ETOH,匂坂 充行,Mitsuyuki SAGISAKA,松永 嵩,Takashi MATSUNAGA,礒部 仁博,Yoshihiro ISOBE, フランク ガーナー,Frank GARNER,沖田 泰良,Taira OKITA
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Ultrasonic testing was conducted on two long (218-245 mm), Type 304 stainless steel blocks with a hexagonal cross-section (50 mm face-to-face thickness) that were removed from the reflector region of the decommissioned EBR-II reactor. Ultrasonic testing is one of the widely used non-destructive testing techniques for material characterization. Ultrasonic waves, currently used as a non-destructive technique to detect cracks, change as a result of interacting with microstructural components and can be em...
英字タイトル:
Development of non-destructive inspection technique for microstructures under irradiation using austenitic stainless steel blocks
第10回
ガイド波によるエルボ部LDI及びFACを最適に検出する方法に関する検討
著者:
高松 尚平,Shohei TAKAMATSU,西野 秀郎,Hideo NISHINO,古川 敬,Takashi FURUKAWA
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Health monitoring of piping is one of the important issues to maintain its integrity.The guided wave monitoring is one of the promising methods r the health monitoring of piping.In this report,the optimum conditions of the guided wave method for both the flow-accelerated corrosion (FAC) and erosion of liquid droplet impingement (LDI) at around the elbow part of the piping were proposed and evaluated.The reason of the optimum con ditions was first explained and the experimental verifications were shown.Nume...
英字タイトル:
On optimum detections of both LDI and FAC on an elbow part of piping by guided waves