144件が見つかりました。

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第5回
フォトサーマルカメラを用いた表面検査技術の評価
著者:
浅田 義浩,Yoshihiro ASADA,須田 洋介,Yosuke SUDA,東 正剛,Masayoshi HIGASHI
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An innovative surface inspection technique b y Photothermal camera was evaluated in this study. Experimental results showed Photo The rmal camera has enough detectability of SCCs....
英字タイトル:
Evaluation of surface inspection technique by Photo Thermal Camera
第5回
プラント従業員の繁忙感に影響を及ぼす背景要因に関する研究
著者:
余村 朋樹,Tomoki YOMURA,奥村 隆志,Takashi OKUMURA,作田 博,Hiroshi SAKUDA,施 桂栄,Guirong SHI,細田 聡,Satoshi HOSODA,伊藤 典幸,Noriyuki ITOH,井上 枝一郎,Shiichiro INOUE
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The reasons of accidents are reported frequently that “I was too busy to avoid an error“ or “I had no time to make a check“. Though there is a view on that personnel reduction and increase in quantity of occupations heighten the feeling of busyness of workers, there are few previous studies on the factors that affect the feeling of busyness. Then, the questionnaire about the feeling of busyness is developed. In this study, in order to make clear the background factors influencing the feeling of busyness, ...
英字タイトル:
A Study of the Background Factors Influencing the Feeling of Busyness of Plant Workers
第5回
ベイズ推定による渦電流探傷法の欠陥寸法計測に関する一手法
著者:
小島 史男,Fumio KOJIMA,菊池 光洋,Mitsuhiro KIKUCHI
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This paper is concerned with a sizing methodology of crack using Bayesian inference arising in eddy current testing. There is often uncertainty about data through quantitative measurements of non destructive testing and this can yield misleading inference of crack sizing at on-site monitoring. In this paper, we propose optimal strategies of measurements in eddy current testing using Bayes ian prior-to-posteriori analysis. First our likelihood functional is given by Gaussian distribution with the measuremen...
英字タイトル:
A Method for Crack Sizing using Bayesian Inference arising in Eddy Current Testing
第5回
ベイズ更新による故障データの収集・整備と保全合理化
著者:
笠井 雅夫,Masao KASAI,草苅 良至,Yoshiyuki KUSAKARI,能登谷 淳一,Junichi NOTOYA,西村 央,Hiroshi NISHIMURA
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Abstract This study represents the evaluation results of the interval estimation for Weibull parameters m and 1 by the methods based on the conventional statistics and the Bayesia n statistics. The interval estimations by the conventional statistics are not necessarily reliable when a lot of failure data are not available. Both methods provide almost same i nterval estimation when a lot of failure data are available. This study also represents the evaluation results of the replacement intervals of equipmen...
英字タイトル:
Development of failure data and Maintenance Rationalization by Using Bayesian Updating
第5回
マイクロ波誘電吸収法による高分子材料の経年劣化評価
著者:
田中 健司,Takeshi TANAKA,小林 茂樹,Shigeki KOBAYASHI,林 賢太,Kennta HAYASHI,廣本 和也,Kazuya HIROMOTO,砂川 武義,Takeyoshi SUNAGAWA
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New technique has been examined for polyethylene r od. This technique has been observed microwave die lectric absorption in polymeric material. The reso nance frequency has a peak at about 200kGy at 300K...
英字タイトル:
Evaluation of Polymeric Materials Aged Deterioration by MicrowaveDielectric Absorption Technique
第5回
マルテンサイト系ステンレス鋼のクリープ損傷に伴う磁気ヒステリシス特性の変化
著者:
木村 敬,Takashi KIMURA,小林 悟,Satoru KOBAYASHI,鎌田 康寬,Yasuhiro KAMADA,菊池 弘昭,Hiroaki KIKUCHI,大谷 俊博,Toshihiro OHTANI
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Measurements of magnetic minor hysteresis loops have been performed in martensitic stainless steel subjected to tensile creep test at 120 MPa and 873 K. The minor-loop coefficients as well as coercivity, which are indicators of internal stress, sharply increase at the primary creep and show a very s low increase at the secondary creep, followed by the steady increase at the ternary creep. A good correlation of the coefficients with creep strain cl early shows that magnetic method using minor hysteresis lo...
英字タイトル:
Changes of Magnetic Hysteresis Properties due to Creep Damage in Martensitic Stainless Steel
第5回
リモートフィールド渦電流探傷法による配管外面欠陥検出の高感度化
著者:
小林 徳康,Noriyasu KOBAYASHI,長井 敏,Satoshi NAGAI,落合 誠,Makoto OCHIAI,神保 昇,Noboru JIMBO,小舞 正文,Masafumi KOMAI
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In the remote field eddy current testing, we proposed the method of enhancing the magnetic flux density in the vicinity of an exciter coil by controlling the ma gnetic flux direction for increasing the sensitivity of detecting outer defects on a tube and used the flux guide made of a magnetic material for the method. T he optimum structural shape of the flux guide was designed by the magnetic field analysis. On the experiment with the application of the flux guide, the magneti c flux density increased by 5...
英字タイトル:
Sensitive Technique for Detecting Outer Defect on Tube with Remote Field Eddy Current Testing
第5回
レーザ外面照射応力改善法による残留応力低減法
著者:
上田 剛史,Takeshi UEDA,村上 平八朗,Heihachiro MURAKAMI
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Improvement of residual stress is effective in a countermeasure for the stress corrosion cracks in pipe welds. An outer surface irradiated Laser Stress Improvement Process (L-SIP) will be introduced as a method to improve residual stress inside steel pipes. This method is to improve inne r surface residual stress from tensile stress to compressive by the temperature differences between inner and outer surface, that is generated b y the irradiation of laser beam around the welds of steel pipe. Recently this...
英字タイトル:
Improvement of Residual Stress by Outer Surface Irradiated Laser Stress Improvement Process
第5回
中性子残留応力測定法を用いた実機経年化溶接継手および補修溶接継手の健全性評価に関する基礎的検討
著者:
小原 智史,Satoshi OBARA,高屋 茂,Shigeru TAKAYA,若井 隆純,Takashi WAKAI,浅山 泰,Tai ASAYAMA,鈴木 裕士,Hiroshi SUZUKI,齊藤 徹,Toru SAITOH
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For the commercialization of fast breeder reactors (FBR), it is essential to enhance the economic competitiveness by reduction of total cost by elongation of plant service period. For this reason, it is needed to establish the aged weld joint integrity assessment method for future FBR compon ents. Additionally, since it is expected to employ the repair weld for aged structural components, it is essential to investigate the effect of repair weld. To investigate the influence of high temperature-long service...
英字タイトル:
Basic investigation of aging weld joint and repair weld joint integrity assessmentusing neutron residual stress measurement method
第5回
中性子照射によって延性が著しく低下する場合の延性破壊条件と構造健全性確保の概念
著者:
實川 資朗,Shiro JITSUKAWA,鈴木 一彦,Kazuhiko SUZUKI,大久保 成彰,Nariaki OKUBO,芝 清之,Kiyoyuki SHIBA,高田 文樹,Fumiki TAKADA,近江 正男,Masao OHMI,中川 哲也,Tetsuya NAKAGAWA
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Results of irradiation experiment on the degradation of ductility of 8-9Cr reduced activation ferritic/martensitic steels are introduced, including those of irradiated austenitic steels. M acroscopic models of post irradiation tensile and fatigue properties obtained from the results are shown. Concept of the models should be essential for future design criteria development....
英字タイトル:
Ductility loss of materials by neutron irradiation and structural integrity of reactor core
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