河上 晃
著者に関連した記事は4件です。
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第6回
デﾕアルエルボにおける複雑流動構造の解明
著者:
矢内 宏樹,Hiroki YANAI,吉田 和弘,Kazuhiro YOSHIDA,結城 和久,Kazuhisa YUKI,戸田 三朗,Saburo TODA,河上 晃,Akira KAWAKAMI,秋葉 真司,Shinji AKIBA
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complex flow FAC multi-elbow s-shaped dual elbow
矢内 宏樹,Hiroki YANAI,吉田 和弘,Kazuhiro YOSHIDA,結城 和久,Kazuhisa YUKI,戸田 三朗,Saburo TODA,河上 晃,Akira KAWAKAMI,秋葉 真司,Shinji AKIBA
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complex flow FAC multi-elbow s-shaped dual elbow
Relatively a large number of pipe failures in a nuclear power plant occur in a multi-component region such as the bends, the orifices and so on. Especially, it has been reported that FAC (Flow Accelerated Corrosion) frequently occurs in a multi-elbow. In this study, therefore, a complex flow structure in a s-shaped dual elbow is observed by using a PIV system to clarify the flow structure. The diameter of the elbow D is 56mm and the curvature radius rate y (=R/D,where Re is a curvature radius) is 1.5. A f...
英字タイトル:
Clarification of complex flow structure in dual elbow
英字タイトル:
Clarification of complex flow structure in dual elbow
第10回
女川原子力発電所 主タービン設備における地震後の復旧工事について
著者:
河上 晃,Akira KAWAKAMI,渡辺 寛之,Hiroyuki WATANABE,齊藤 靖広,Yasuhiro SAITO,草階 達朗,Tatsuo KUSAKAI
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Bearing stand damage Earthquake Steam turbine Turbine blade
河上 晃,Akira KAWAKAMI,渡辺 寛之,Hiroyuki WATANABE,齊藤 靖広,Yasuhiro SAITO,草階 達朗,Tatsuo KUSAKAI
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Bearing stand damage Earthquake Steam turbine Turbine blade
The massive earthquake struck Onagawa nuclear power plant on March 11, 2011, and the nuclear reactor and the steam turbine was shut-down automatically. As a result of the post-earthquake steam turbine inspection, remarkable damages have been confirmed on the turbine blades and the bearing stands, and currently the restoration works have been conducted. This report introduces the damage status of the steam turbine caused by the earthquake, and activities of restoration work. ...
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Post-earthquake restoration work of the steam turbine at Onagawa Nuclear Power Plant
英字タイトル:
Post-earthquake restoration work of the steam turbine at Onagawa Nuclear Power Plant
第10回
女川原子力発電所における震災後の点検活動
著者:
河上 晃,Akira KAWAKAMI,佐藤 徹,Toru SATO,田村 耕平,Kohei TAMURA,佐藤 幹夫,Mikio SATO,阿部 貴光,Takamitsu ABE
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Nuclear Power Station，earthquakes s
河上 晃,Akira KAWAKAMI,佐藤 徹,Toru SATO,田村 耕平,Kohei TAMURA,佐藤 幹夫,Mikio SATO,阿部 貴光,Takamitsu ABE
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Nuclear Power Station，earthquakes s
Although the Onagawa NPS was the closest nuclear power station to the epicenter of the Great East Japan Earthquake, the plant achieved cold shut down safely. In addition to keeping the cold shut down status after that, the inspections for confirming the soundness of the equipment are on-going according to the special maintenance program we made after the earthquake. Situation of the maintenance at the Onagawa NPS is presented in this paper. ...
英字タイトル:
Inspections after the Great East Japan Earthquake at the Onagawa Nuclear Power Station
英字タイトル:
Inspections after the Great East Japan Earthquake at the Onagawa Nuclear Power Station
第6回
東北電力の原子力発電所における配管肉厚管理の概要
著者:
秋葉 真司,Shinji AKIBA,丹治 和宏,Kazuhiro TANJI,河上 晃,Akira KAWAKAMI
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Erosion Pipe Wall Thickness Management Pipe Wall Thinning
秋葉 真司,Shinji AKIBA,丹治 和宏,Kazuhiro TANJI,河上 晃,Akira KAWAKAMI
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Erosion Pipe Wall Thickness Management Pipe Wall Thinning
Pipe wall thinning is an aging process that has a significant effect on the safety and safe operation of power plants and its appropriate management is an issue common to a ll electric power companies. Tohoku Electric Power Co., Inc. has been putting an emphasis on pipe wall thickness management since 2006, when a through-hole possibly due to droplet-impact erosion was found in the vent piping of high-pressure feedwater heater No.2 at Onagawa Nuclear Power Station unit 2. Following this incident, extensive...
英字タイトル:
Overview of Pipe Wall Thickness Management at Tohoku Electric Power
英字タイトル:
Overview of Pipe Wall Thickness Management at Tohoku Electric Power