128件が見つかりました。

並び替え
・
第14回
電動機のウェーブワッシャ不良による深溝玉軸受の早期損傷メカニズムと振動診断
著者:
佐々木 一人,Ichito SASAKI,瀬川 佑太,Yuta SEGAWA
発刊日:
公開日:
キーワードタグ:
Maintenance methods are broadly grouped to the preventive maintenance(Time Based Maintenance) and the post incident maintenance(Condition-Based-Maintenance,Breakdown-Maintenance). It is unusually confirmed after maintenance that an unsuitable disassembling of rotating equipment causes incident such as increasing of vibration or abnormal sound. At the case of maintenance of electrical motors that are used for mid or small sized pumps or blowers, and wave-washer is reused, a few times of these phenomena ...
英字タイトル:
Early damage mechanism and vibration diagnosis for ball bearing of electric motor caused by unsuitable function of wave washer.
第14回
電磁超音波を用いた減肉モニタリングシステムの 福島第一原子力発電所4号機使用済燃料プール冷却配管への適用
著者:
高木 敏行,Toshiyuki TAKAGI,内一 哲哉,Tetsuya UCHIMOTO,浦山 良一,Ryoichi URAYAMA,鈴木 聡則,Akinori SUZUKI
発刊日:
公開日:
キーワードタグ:
In the decommissioning measures of Fukushima Daiichi Nuclear Power plant (1F), it is important to ensure the thermal stability of the reactor and the whole system by the cooling system in order to prevent criticality of fuel and fuel debris. However, wall thinning is concerned due to the corrosion in the piping of the cooling system. In order to maintain the safety of the system, it is necessary to manage the piping thinning. In this study, the EMAT thickness monitoring system, which can measure thickne...
英字タイトル:
Application of monitoring system using electromagnetic acoustic transducers for wall thickness measurement to Fukushima Daiichi nuclear power plant Unit 4 spent fuel pool cooling piping
第14回
電磁超音波探触子を用いた多重センシング
著者:
小島 史男,Fumio KOJIMA
発刊日:
公開日:
キーワードタグ:
Ultrasonic testing using the electromagnetic acoustic transducer (EMAT) has great advantages on remote capabilities, non-contacting device, and robustness to high temperature. In application of thicNness measurements of pipe wall thinning to online monitoring, it is necessary to measure the temperature of pipe wall due to the temperature dependency of sound velocity. For the limitation of the sensor allocation, the multiple sensing using a single device is recommended. TaNing into remind that, this study...
英字タイトル:
Multiple sensing using electromagnetic acoustic transducer
第14回
非破壊検査装置への応用を目指した臭化タリウム(TlBr)検出器による ステンレス鋼材を用いた応答特性評価
著者:
高坂 充,Makoto KOUSAKA,人見 啓太朗,Keitaro HITOMI,長野 宣道,Nobumichi NAGANO,石井 慶造,Keizou ISHII
発刊日:
公開日:
キーワードタグ:
The nuclear fuels reprocessing facilities are required to perform appropriate maintenances for the ageing phenomena of the facilities. Development of non-destructive testing devices with high detection precision of the defects, small sizes, and lightweights are essential for testing the facilities. In this study, thallium bromide (TlBr) detectors, which have high absorption efficiency for gamma rays, are developed for the application to a radiographic testing (RT) device. The detector performance was...
英字タイトル:
Response evaluation of thallium bromide (TlBr) detectors for non-distractive testing using stainless steel materials
第14回
高温用薄膜UTセンサを用いた連続モニタリングシステムの開発
著者:
小平 武志,Takeshi KODAIRA,細見 舜,Shun HOSOMI,武田 義勝,Yoshikatsu TAKEDA,松浦 貴之,Takayuki MATSUURA,近藤 一海,Kazuumi KONDO,木村 是,Tadashi KIMURA
発刊日:
公開日:
キーワードタグ:
Periodical measurement of pipe wall thickness for power plant is performed with manual UT during outage. Furthermore, periodical water level measurement is performed during plant operation by using UT sensor because there is a possibility that the gas-void in the piping may adversely affects the components. There is necessary to carry out the monitoring during plant operation in order to realize the improvement of those managements. However, the continuous monitoring during plant operation is difficult...
英字タイトル:
Continuous monitoring system using high-temperature thin-film UT sensor
第14回
高線量配管における配管減肉オンラインモニタリングシステムの検証
著者:
村山 諒太,Ryota MURAYAMA,川見 勇介,Yusuke KAWAMI,鈴木 聡則,Akinori SUZUKI,森田 一郎,Ichiro MORITA,吉田 正志,Masashi YOSHIDA
発刊日:
公開日:
キーワードタグ:
Online pipe thickness monitoring sensors, EMAT, Thin-film UT sensor and FLEXDRY UTM were installed to Unit4 spent fuel pool cooling system of Fukushima No.1 Power Plant. Pipe wall thinning data and ultrasonic waveform were recorded in a control PC near the pipe. EMAT can be controlled by remote PC in a office far from No4 Unit through local area network. The measured pipe wall thickness value by FLEXDRY UTM are parallel with results of conventional UM sensor well. Starting of online monitoring of Thin-...
英字タイトル:
Verification of online thickness monitoring system for radioactive pipes
第14回
高耐久ライニングによる海水系信頼性向上
著者:
竹内 遼太,近藤 祐司,岩田 知和,田中 峻介,加福 秀考,須田 康晴
発刊日:
公開日:
キーワードタグ:
In nuclear power plants in Japan, seawater is used as the cooling water. The inner surface of piping for circulating the seawater to the cooling system of each facility is lined with polymeric materials such as rubber, polyethylene (PE) or epoxy resin to prevent corrosion caused by the seawater. In recent years, cases of deterioration caused by aging of the lining materials have occurred, such as cavitation erosion in high flow velocity sections, slurry abrasion, and cracking due to the deterioration of p...
英字タイトル:
Improvement in sea water system reliability by high durability lining material
第14回
高速道路トンネル内の路上落下物視認性向上のための 基本照明最適化
著者:
大草 光司,Koji OHKUSA,重松 大樹,Daiki SHIGEMATSU,三宅 賢二,Kenji MIYAKE,池田 善久,Yoshihisa IKEDA,神野 雅文,Masafumi JINNO
発刊日:
公開日:
キーワードタグ:
To improve visibility of fallen objects in expressway tunnel, we optimized the ratio of the horizontal to the vertical illuminances based on subject experiments using a model tunnel. To increase surface luminance contrast between an object and road surface, the vertical illuminance was increased. In the case of the luminance contrast was higher than 1.32, the objects whose reflectivity is over 10 % were recognized by all the research subjects. On the other hand, increase in the horizontal illuminance did...
英字タイトル:
Optimization of basic lighting for improving the visibility of fallen objects in expressway tunnel.
Copyright © 2019 保全技術アーカイブ - サイトポリシー