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第3回
炉内構造物検査用の渦電流探傷技術の開発
著者:
西水 亮,Akira NISHIMIZU,松井 哲也,Tetsuya MATSUI,小池 正浩,Masahiro KOIKE,吉田 功,Isao YOSHIDA,野中 善夫,Yoshio NONAKA
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1 flexible multi-coil eddy current testing (ECT) probe and a method for measuring the length of flaws have meen developed for inspecting comple x structures in the reactor pressure vessel of nuclear plants. The probe can be applied to curved surfaces that are larger than a curvature rad ius of 20 mm. And we propose the nethod for measuring the flaw length by introducing a decibel drop method of the ECT output signal. From the te st results of various EDM notches using the probe and the measuring method, we...
英字タイトル:
Development of Eddy Current Technique for Components in Reactor Pressure Vessel
第3回
炉内計装筒管台内面軸方向応力腐食割れき裂進展シミュレーション
著者:
佐藤 康元,Yasumoto SATO,庄子 哲雄,Tetsuo SHOJI
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A 3D-FEM simulation code based on the deformation/oxidation model for the evaluation of SCC in comp act tension specimens was extended to evaluate the axial SCC behavior of mock-up specimens of botto m mount instrumentation tube of pressurized water reactor, and its applicability was investigated by comparing the cracking behavior calculated by the simulation with that obtained by the experiment....
英字タイトル:
Stress Corrosion Cracking Test Methodology for inner axial cracks and its cracking behavior
第3回
状態遷移モデルを用いて誤診断を考慮した CBM と TBM のベストミックスの検討
著者:
凌 元錦,Yuanjin LING,高瀬 健太郎,Kentaro TAKASE,真木 紘一,Koichi MAKI
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In the present study, effect of spurious diagnostics to improvement of safety, and po ssibility of extension in the interval of TBM (Time-Based Maintenance) by introducing CBM (Condition-Based Maintenance) and necessity of TBM were investigated. From these investigations, improvement of safety and reduction of maintenance cost can be seen....
英字タイトル:
Study on Best-Mix of CBM and TBM Considering Effect of Spurious Diagnostics Using State Transition Model
第3回
現場技術継承支援動画システム(K-SHOW)の運転・保守業務への適用性検討
著者:
鹿毛 佳子,Yoshiko KAGE,窪野 哲光,Norimitsu KUBONO
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The fact that operators in the power plants and the power networks needed On the Job Training (OJT) opportunities and adequate materials was one of the most important factors that impr oved human performance. In this research, we have developed, “Movie-centric Multimedia System“, or “K-SHOW”, for supporting operation and maintenance in order to improve their skills a nd knowledge. Operators could author the movies with texts, symbols, and so forth interactively and flexibly and could view it on the CRT scr...
英字タイトル:
Development and Evaluation of a Movie-centric Multimedia System for supporting operation and maintenance “K-SHOW”
第3回
磁気的手法による SUS304 鋼の高温疲労初期損傷評価
著者:
高屋 茂,Shigeru TAKAYA,永江 勇二,Yuji NAGAE
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We investigated the relationship between magnetic properties and the accumulation of fatigue damage at elevated temperature for SUS304 stainless steel. The strain-controlled push-pull fatigue tests at 923 K under total str ain range conditions of 0.4%, 0.5% and 0.7% were implemented. The leakage magnetic flux density was also measured before and after each fatigue test. As result, it was shown that the maximum differences in leakage magnetic flux density before and after the fatigue test subsequently incre...
英字タイトル:
Evaluation of Initial Fatigue Damage of SUS304 Stainless Steel at Elevated Temperature by a Magnetic Method
第3回
福井県の特徴を踏まえた高経年化研究計画について
著者:
榊原 安英,磯村 和則,山下 卓哉,渡士 克己,土井 基尾,大草 享一,田川 明広,平原 謙司
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This study was performed to enrich the contents of measures for an ageing of t he nuclear power plants at Fukui area, where infrastructures of research works , for example, institutes, universities etc. are intensively existed., accordi ng to the Road-Map established by the Atomic Energy Society of Japan at 2005,...
英字タイトル:
Research Program for Ageing of Nuclear Power Plant based on Characteristics of FUKUI Area
第3回
簡易振動計を用いた小口径配管の振動応力評価手法
著者:
野田 満靖,Michiyasu NODA,鈴木 道明,Michiaki SUZUKI,藤田 勝久,Katsuhisa FUJITA
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This paper proposes the method of estimating vibration-induced stress for the complex small-bore piping vith general piping. The method consists of the vibration m easurements and the finite element method FEM). The stresses are estimated using the FEM model optimized by the values of vibration measurements. Vibration test is performed to validate the method. As the results, the estimated stress using the second proposal method became to be from 0.5 to 2 times to the measured one. Sinc e the vibration-indu...
英字タイトル:
Method of Estimating Vibration-Induced Stress of Small-Bore Piping Using Portable Vibrometer
第3回
複雑形状欠陥の渦電流探傷による新しい深さサイジング法
著者:
兼本 茂,Shigeru KANEMOTO
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Depth sizing of multiple closely located parallel cracks are studied as a simplification of stress corrosion crack (SCC). Because of the interference from other cra cks, eddy current testing (ECT) signals of the multiple cracks are different from that of a single one, and the method used for the depth sizing of a single crack i s not practical for that of multiple cracks. In order to find a depth sizing index which is sensitive to just the maximum depth of multiple cracks, an optimum model finding method b...
英字タイトル:
A New Depth Sizing Method for Complex Shape Stress Corrosion Cracks from ECT Signals
第3回
誘導型電位差法を用いた SUS304 配管溶接部における応力腐食割れの連続モニタリング
著者:
渥美 健夫,Takeo ATSUMI,佐藤 康元,Yasumoto SATO,庄子 哲雄,Tetsuo SHOJI
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Continuous monitoring of stress corrosion cracking (SCC) in chloride solution containing thiosulfate was performed using type 304 stainless steel pipe specimen with weldments. Induced Current Potentia l Drop (ICPD) method was used to the continuous monitoring of the SCC growth. The ICPD method permit s continuous monitoring of the SCC growth which initiates from the inner wall of the pipe specimen....
英字タイトル:
Continuous Monitoring of Stress Corrosion Cracking Growth in Type 304 Stainless Steel Pipe Weldments using Potential Drop Method.
第3回
超音波振動計を用いた縦型ポンプ診断
著者:
日隈 幸治,Koji HIGUMA,尾崎 健司,Kenji OSAKI,清水 俊一,Shunichi SHIMIZU,山下 和彦,Kazuhiko YAMASHITA,高柳 英彰,Hideaki TAKAYANAGI
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This paper introduces the simply applicable vibration diagnostic technique to a vertical type pump in nuclear power pla nts. This technique is the combination of simple shaft vibration measurement by an ultrasonic vibrometer and a rotor dy namics simulation. By using this technique, for vertical type pump, a simple and high-precision diagnosis is attained. It is expected that this technique has effect in cost reduction and improvement of reliability in nuclear power plants....
英字タイトル:
Vertical type pump diagnosis using an ultrasonic vibrometer
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