144件が見つかりました。

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第5回
電磁超音波法による減肉の定量評価
著者:
小坂 大吾,Daigo KOSAKA,小島 史男,Fumio KOJIMA
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This paper is concerned with quantitative evaluation of corrosion shape on back surface of Stainless s amples by Electro Magnetic Acoustic Transducer (EMAT). First we summarize numerical studies of the qua ntitative nondestructive evaluation by EMAT. Secondly, a method for recovering corrosion shape is prop osed. Aspect ratio (corrosion height / corrosion radius) is important for recovery a corrosion shape....
英字タイトル:
Identification of Corrosion Shape by EMAT
第5回
静磁界及び微小交流磁界を併用した鋼板肉厚測定法の三次元非線形磁界解析評価
著者:
徳本 貴則,Takanori TOKUMOTO,小野田 二千翔,Nichika ONODA,後藤 雄治,Yuji GOTOH
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The inspection of the defect in the steel wall of the oil tank in the petrochemical plant etc. is important for the safe maintena nce. In this paper, the electromagnetic inspection method using a de magnetic field and a minute ac magnetic field is proposed. G enerally, in the steel, the relative permeability is not unity.Therefore, the technique for reducing the effect of the nonuniformi ty of the permeability in the steel, and measuring the opposite side defect on the steel wall is examined using 3D nonli...
英字タイトル:
Examination of 3-D nonlinear FEM for thickness on steel plate using static magnetic field and minute alternating electromagnetic field
第5回
非接触型変位計を用いた小口径配管の振動応力計測方法の開発
著者:
野田 満,Michiyasu NODA,高橋 茂,Shigeru TAKAHASHI
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In the nuclear power plant, where many small-bore piping connected to vibrational sources like pumps, it is important to evaluate vibrational stress to keep the plant operating safely. The purpose o f this study is to develop a method to measure vibrational stress efficiently by using multiple contactless displacement sensors. The applicability of the method is verified by vibration tests with a pipe. In the vibration tests, the stress calculated by the proposed method was compared with the stress measured...
英字タイトル:
Development of Method to Measure Vibrational Stress of Small-Bore Piping with Multiple Contactless Displacement Sensors
第5回
非破壊手法によるウラン・プルトニウム組成比決定法の研究
著者:
高峰 潤,Jun TAKAMINE,春山 満夫,Mitsuo HARUYAMA,高瀬 操,Misao TAKASE
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We have not yet known the nondestructive detection method to determine each quantity of the object which Uranium and Plutonium is mixed in, such a w aste generated from nuclear fuel cycle facility, and so radioactive intensity of Pu-239 is 10,000 times as much as U-235. Therefore, on radioactive assessment, it is important to precisely quantify each mass. Then we paid attention to the component of delayed and prompt neutron obtained by 14 Me V neutron direct interrogation method and so developed the new me...
英字タイトル:
Research for determination of elemental ratio between Uranium and Plutonium by Non-destructive method
第5回
非線形主成分分析を用いた回転機の音響監視
著者:
兼本 茂,Shigeru KANEMOTO,玉置 哲男,Tetsuo TAMAOKI,清水 俊一,Shun-ichi SHIMIZU
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The acoustic data remotely measured by handy type microphones are investigated for monitoring and diagnosing the ball bearing type rotational machine integrity in nucle ar power plants. The present study proposes the new signal pre-processing method which normalizes the fundamental oscillation period into the same length and timing by using zero-crossing interval of filtered acoustic signal. The pre-processed signal patterns are classified by kernel-based principal component analysis (KPCA) and prob abilis...
英字タイトル:
Acoustic Diagnosis Using Kernel Based Principal Component Analysis
第5回
高感度磁気センサを用いたオーステナイト系ステンレス鋼のき裂の検出
著者:
安部 正高,Masataka ABE,琵琶 志朗,Shiro BIWA,松本 英治,Eiji MATSUMOTO
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This study attempt to detect cracks in austenitic stainless steel by Magnetic Flux Leakage Technique with a high sensitive magnetic sensor. If a specimen is subjected to the stress, the magnetic properties change or the martensite phase is formed due to the plastic deformation or the stress induced phase transformation.. When the generated phase is martensite, this local change of magnetic property can be detected by measuring the Magnetic Flux Leakage with a sensitiv e magnetic sensor. In order to verify ...
英字タイトル:
Detection of Crack in Austenitic Stainless Steel with High Sensitive Magnetic Sensor
第5回
高温ガス炉の保全技術の開発
著者:
古澤 孝之,本間 史隆,猪井 宏幸,澤畑 洋明,根本 隆弘,渡辺 周二,太田 幸丸
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Japan Atomic Energy Agency has constructed the HTTR (High Temperature engineering Test Reactor), which is the Japa n's first High Temperature Gas-cooled Reactor (HTGR). The HTTR achieved the full power of 30MW and reactor outlet coolant temperature of 950°C on April 19, 2004. Based on the HTTR maintenance experiences, the preservation techno logy for HTGR are developed. This paper describes its preservation philosophy and typical developed technologies....
英字タイトル:
Development of preservation technology for High Temperature Gas-cooled Reactor
第5回
高経年化対策基盤強化のための研究開発と保全高度化（3）
著者:
関村 直人,Naoto SEKIMURA
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Systematic development of information basis for database and knowledge-base has been performed in addition to the development of c odes and standards by academic societies, regulatory bodies and industries through the intensive domestic safety research collabo rations and international collaboration. Continuous revision of Strategy Maps for Ageing Management and Safe Long Term Operation h as been performed under the Coordinating Committee of Ageing Management to promote effective research and development a...
英字タイトル:
Research and Development Strategy and Maintenance Engineering to Strengthen the Basis of Ageing Management, 3rd report
第5回
高経年化情報ネットワークと劣化管理表
著者:
橋倉 靖明,Yasuaki HASHIKURA,菅野 眞紀,Masanori KANNO,北條 智博,Tomohiro HOJO
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The number of plants exceeding 30 years after the start of their commercial operation will reach 20 units in 2010, and one of those plants will see even its 40th anniversary after the s tart of its commercial operation in the same year. Under these circumstances the aging management of nuclear power plants has been one of the key issues from the viewpoint of maintainin g safety and reliability of nuclear power plants. Under such background, JNES has started the development of the technical information basi...
英字タイトル:
Information network of ageing and Deterioration management table
第5回
高経年化機器の状態監視のための新技術適用性に関する研究
著者:
高橋 浩之,Hiroyuki TAKAHASHI,沖田 泰良,Taira OKITA,近藤 直樹,Naoki KONDO
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1. 緒言課題をまとめた。これらのプロセス事例調査から、 原子力発電所機器の高経年化に的確に対応するには、 ・ 規制側が新技術の実機適用に関する審査を行う上 高経年化機器の状態を正確に把握するための検査・モで参照すべき技術基準類や国内外事例が多く、時 ニタリング技術、その結果に基づき経年劣化の進展を 間を要する一因となっている。 正確に予測するための評価技術、さらにその結果に応 ・新技術に対して、国内外の複数メーカにより同時 じて必要な対応措置を講じるための対応措置(補修等) ・比較評価を行った場合は、比......
英字タイトル:
Research on the applicability of new techniques for status monitoring of ageing equipment
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