87件が見つかりました。

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第9回
マイクロ波技術を用いた低圧ケーブルの経年劣化評価手法の研究
著者:
山本 幸,Miyuki YAMAMOTO,佐伯 昭紀,Akinori SAEKI,関 修平,Shu SEKI,砂川 武義,Takeyoshi SUNAGAWA
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In 2012, there are 50 commercial nuclear power plants in Japan. There are 20 nuclear power plants which are working for 30 ye ars or more. It is very important to measure the aged deterioration of the cable used in those nuclear power plants. Generall y, degradation of a cable was measured by the tensile test. It was difficult to measure an electrical property quickly and n ondestructively. We developed the nondestructive measurement technology of cable degradation which used microwave technology....
英字タイトル:
Ageing study of cable insulation by means of microwave absorption method
第9回
レーザースキャンデータからの現場3次元認識システム
著者:
河口 裕治,Yuji KAWAGUCHI,佐藤 美徳,Yoshinori SATOH,木村 静,Shizuka KIMURA,遠藤 哲央,Tetsuo ENDOH,本橋 正宏,Masahiro MOTOHASHI,畠山 誠,Makoto HATAKEYAMA
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Toshiba Corporation is constructing a database system of as-built data of equipments and components in various n uclear plants in order to reduce the amount of redesign works when the plants are modified. We are obtaining the as-built data by using 3D laser scanner, and storing the data as 3DCAD models for ease-of-use. However, it takes long hours to obtain 3DCAD models because the volume of 3D laser scan data is very large and workers manually c onvert those data to 3DCAD models.In this development, we ha...
英字タイトル:
Automated 3D Shape Recognition System using Laser Scan Data
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
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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9回
保全科学的想像力を活かした保全活動の検討方法
著者:
青木 孝行,Takayuki AOKI,高木 敏行,Toshiyuki TAKAGI
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It is difficult to predict an initiation and growth of ageing/degradation like SCC in plant comp onents, subsequent component failures, function losses or a behavior of gigantic, complex plant system like a nuclear power plant. But if it is possible to predict them, it could drastically improve the safety and economic efficiency of such plant systems. This study considered a struc ture and system of maintenance since that could improve a predictive performance of maintenance related science and engineerin...
英字タイトル:
Study of How to Confirm the Completeness of Maintenance Activity Planby Using Maintenance Scientific Imagination
第9回
動画予測を用いた異常診断手法の開発
著者:
榊原 洋志,Yoji SAKAKIBARA,出町 和之,Kazuyuki DEMACHI,河合 理城,Masaki KAWAI,リッチャタクリ, Ritu CHHATLULI,上赤 一馬,Kazuma KAMIAKA
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In this research, the new method to predict the near-future of the movie images captured by video camera based on the combination of t he Principle Component Analysis (PCA) and the Singular Spectral Analysis (SSA). In the normal condition of machines, the real-time ca ptured movie is supposed to correspond to the predicted one. If the error between the both becomes significantly large, it may suggest some anomalous motion of the machines. So the movie prediction method has a possibility of the sensitive an...
英字タイトル:
Development of Anomalous Detection using Movie Prediction
第9回
包絡線スペクトル、信号融合および LSM 主成分分析を用いた回転機械構造系異常の精密診断法
著者:
陳山 鵬,Ho JINYSMA,滝 浩太朗,Kotaro TAKI,李 可 Ke Li,薛 紅涛,Hongtao XUE
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Abstract : Structural faults are often occurring in a rotating machine, such as, u nbalance, misalignment and looseness etc., and their feature spectra of vibration signal appear in the low frequency area. The precise diagnosis for the structural faults type is difficult in the real plant, because of the noise in the vibratio n signal and the complex structure of the plant machine. In this study, we propose d the precise diagnosis method of structural fault for rotating machinery using en veloped wave spec...
英字タイトル:
Precise Diagnosis Method of Structural Fault for Rotating Machinery Using Enveloped Wave Spectra, Signal Fusion and LSM Principal Component Analysis
第9回
原子力発電事業リスクのマネジメント手法に関する考察
著者:
山下 寛子,Hiroko YAMASHITA
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Reputation loss is regarded as a management issue because it impacts to business and industries significantly. Reputation management is o ne of the approach both business and pubic organizations. Applicatio n of reputation management for nuclear plant management is discussed....
英字タイトル:
Study on Risk Management for Operation of Nuclear Generation Plant
第9回
原子力発電所における是正計画の 基本的立案方法に関する考察
著者:
青木 孝行,Takayuki AOKI,高木 敏行,Toshiyuki TAKAGI
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For creating a corrective measure plan for industrial plants like nuclear power plants, it is necessary to have a well-grounded basis. Therefore, this paper proposes a method for determining the fol lowing three elements of such a plan: the equipment to be repaired, the corrective measure method to be adopted, and the timing of its implementation using a scientific approach. The key idea is to analyze the components of the plan and also to take an approach of creating a plan based on the performance of the...
英字タイトル:
Discussion of Corrective Action Planning for Nuclear Power Plants
第9回
原子力発電所の自然現象に対する技術基準要求に関する調査検討
著者:
伊藤 邦雄,Kunio ITO,青木 孝行,Takayuki AOKI
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Technical codes and standards on natural phenomena, in particular, earthquake and tsunami for nuclear power plants in the other developed countries including IAEA safety standards were investigated. Then, the results were compared wi th the corresponding Japanese technical codes and standards. As a result, it was found that: (1) technical codes and standards on natural phenomena, especially those for earthquakes and tsunami/flooding in those foreign countries and their requirements are all included in the ...
英字タイトル:
Investigative study on the technical code requirements of natural eventshazards for nuclear power plants
第9回
原子力発電所の配管減肉管理における局所減肉許容基準導入の検討
著者:
中村 隆夫,Takao NAKAMURA,茨 崇史,Takashi IBARA
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Pipe wall thinning caused by FAC (Flow Accelerated Corrosion) and LDI (Liquid Droplet Impingement)is managed through the measurement of pipe wall using UT (Ultrasonic Test) and the replacement of thinning element until reaching allowable limit in order to prevent pipe failure in Japan. Minimum wall thickness of design codes is applied to the allowable limit of pipe wall thinning management. On the other hand, the thinning area is localized in pipe wall caused by FAC and LDI, so the integr ity of piping sys...
英字タイトル:
Application of local thinning criteria in pipe wall thinning management of nuclear power plant
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