87件が見つかりました。

並び替え
・
第9回
軸受転動体異常の定量的評価手法に関する研究
著者:
角皆 学,Manabu TSUNOKAI,萱田 良,Ryo KAYATA,ペラン ステファン, Stephane PERRINE,高瀬 健太郎,Kentaro TAKASE
発刊日:
公開日:
キーワードタグ:
This study aimed to establish the method for evaluating the amount of bearing flaking in balls. We performed 5 accelerated aging tests of ball bearing s that expedite the occurance of flaking in balls and analyzed the vibraion signal. Some characteristic features for initial stage of flaking in balls are revealed such as sudden decrease of vibarion level or pulse vibration once per several revolutions of a ball. Those knowledge can be used for diag nosing the severity of bearings that indicate the existanc...
英字タイトル:
A Study on Evaluating the Amount of Bearing Flaking in Balls
第9回
軽水炉燃料の健全性予測のための被覆管酸化挙動の理論解析
著者:
山本 泰功,Yasunori YAMAMOTO,森下 和功,Kazunori MORISHITA,岩切 友,Hirotomo IWAKIRI,金田 保則,Yasunori KANETA
発刊日:
公開日:
キーワードタグ:
In order to establish the nuclear power system with sufficient safety, a lot of continuous efforts towards pursuing further plant safety should be made, not only at the plant design and construction stages, but also at the plant maintenance after start using as aging management. In many cases, plant aging are associated with material's degradation due to irradiation, cycle fatigue loading, high temperature, high pressure, etc. It is therefore very important that the degradation of materials under those se...
英字タイトル:
Theoretical evaluation of oxidation behavior of fuel cladding in light-waterreactor for prediction of fuel reliability
第9回
配管要素の組み合わせにより発生する旋回流の物質移動係数評価
著者:
鈴木 翔太,Shota SUZUKI,中村 隆夫,Takao NAKAMURA,米田 公俊,Kimitoshi YONEDA
発刊日:
公開日:
キーワードタグ:
Flow accelerated corrosion (FAC) is the major pipe wall thinning phenomena in power plants. The management of pipe wall thinning has been carried out to pipe elements such as elbow, orifice, etc. of the piping system in power plants. In piping system, it is known that several pipe elements which are connected in series may generate swirl flow. Therefore the arrangement of pipe elements is considered to affect thinning phenomena seriously. So the behavior of this swirl flow is one of the major research tar...
英字タイトル:
Evaluation of mass transfer coefficient under swirl flowgenerated by the combination of pipe elements
第9回
関西電力の原子力発電所における安全性、信頼性向上の取り組み
著者:
鎌田 徹,Toru KAMADA
発刊日:
公開日:
キーワードタグ:
Abstract: The outline of the measures for improved safety and reliability of nuclear power plants of the Kansai Electric Power Co., Inc. (KEPCO) is show n. KEPCO is taking comprehensive safety measures continuously against the Fu kushima-daiichi incident and aiming for the world's highest level of safety....
英字タイトル:
The measures for improving safety and reliability of the Kansai's NPP
第9回
電磁診断技術によるすべり軸受摩耗量評価手法の研究
著者:
萱田 良,Ryo KAYATA,馬渡 慎吾,Shingo MAWATARI,ペラン ステファン,Stephane PERRIN,角皆 学,Manabu TSUNOKAI,高瀬 健太郎,Kentaro TAKASE
発刊日:
公開日:
キーワードタグ:
A new electromagnetic method for the nondestructive evaluation of electric pumps with sliding bearings is proposed. A permanent magnet gen erates a static magnetic field and a coil of several hundred turns wrapped around it is used to pick up eddy currents induced inside rotat ing impellers. This electromagnetic nondestructive evaluation method is applied to the canned pump. By monitoring the movement of the impe ller in a canned pump, the rotation speed, the variance of the impeller position as well as th...
英字タイトル:
Study of Evaluation Method for the Amount of Wear-Out of Plain bearingswith Electromagnetic Sensor
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9回
電磁超音波探触子を用いた配管減肉計測の信頼性評価
著者:
小坂 大吾,Daigo OSAKA,小島 史男,Fumio KOJIMA,中本 裕之,Hiroyuki NAKAMOTO,田端 大樹,Hiroki TABATA,加藤 翔,Sho KATO
発刊日:
公開日:
キーワードタグ:
This paper is concerned with risk assessment of pipe wall thinning management. The reliability of the NDT systems is evaluated from probability of detection (POD). The statistical uncertainty of NDT reliability is then represented by a conservative confidence bound on the POD function. The idea is applied to the pipe wall thinning management using electro magnetic acoustic transducer....
英字タイトル:
Reliability Assessment of Pipe Wall Thickness Measurementsusing Electro Magnetic Acoustic Transducer
第9回
高クロム鋼溶接材の傾斜欠陥に関する電磁逆解析手法の提案
著者:
中住 昭吾,Shogo NAKASUMI,鈴木 隆之,Takayuki SUZUKI,高島 尚之,Naoyuki TAKASHIMA,槌田 雄二,Yuji TSUCHIDA
発刊日:
公開日:
キーワードタグ:
The technique of obtaining shape of inclined defect at heat affected zon e for welded specimen of high chromium steel was proposed. In this techn ique, magnetic flux leakage measurement and the inverse analysis using s ingular value decomposition were used. Suitable defect shape was obtained from the magnetic flux density distribution under the high magnetic fiel d without being subject to the influence of a welding part. Under the lo w magnetic field, suitable defect shape was obtained by subtracting the ...
英字タイトル:
Proposal of electromagnetic inverse analysis technique about the inclineddefect for welded specimen of high chromium steel
第9回
高出力レーザー加工を用いた炭素繊維強化複合材料の- 劣化・損傷機構Degradation and Damage Mechanisms of Carbon Fiber Reinforced Plastic
著者:
川井 恭平,Kyohei KAWAI,原田 祥久,Yoshihisa HARADA,鈴木 隆之,Takayuki SUZUKI,寺本 徳郎,Tokuo TERAMOTO,西野 充晃,Michiteru NISHINO,新納 弘之,Hiroyuki NIINO
発刊日:
公開日:
キーワードタグ:
Carbon fiber-reinforced plastics (CFRP), which is expected to reduce the weight or increase the efficiency of transportations and energy products, was cut by an CO2 gas laser (10.6um, 800W, 20kHz, 8us, 1m/min), CW single-m ode fiber laser (1.07um, 300W, 2000W, CW single-mode, 1m/min, 7m/min) and machining with milling. Although the high-power laser cutting processes make it possible to improve cutting rate of CFRP, the laser-cut specimens cl early showed a thermal damage with a heat-affected zone (HAZ) ide...
英字タイトル:
(CFRP) using High-power Laser Cutting ProcessStudent Member
第9回
高温インパクトフレッティング試験による配管減肉現象の評価
著者:
佐藤 善紀,Yoshiki SATO,岩渕 明,Akira IWABUCHI,内館 道正,Michimasa UCHIDATE,八代 仁,Hitoshi YASHIRO
発刊日:
公開日:
キーワードタグ:
In this paper, to study the wear properties of the pipe materials for the nuclear power stations, a high temperature impact fretting testing was carried out. Employing two piezo actuators, impact fretting test rig can generate impact fretting under various impact loads, fretting amplit udes and frequencies. It also enables us to control water temperature, dissolved oxygen and water pressure. AISI type 304 stainless steel, which is used as a pipe material in nuclear power stations, was used as specimens. Al...
英字タイトル:
Evaluation of pipe wall thinning phenomenon by the high temperature impactfretting testing
Copyright © 2019 保全技術アーカイブ - サイトポリシー