152件が見つかりました。

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第7回
(旭化成エンジニアリング) 振動傾向管理システム(MD-320、LEONEX)
著者:
福永 辰也,Tatsuya FUKUNAGA
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キーワードタグ:
The necessity of a stable driving of equipment and effective maintenance achievement rises, and the effectiveness of CBM (Condition Based Maintenance) has bee n recognized again in recent years. It is a vibration diagnosis technology of the rotating equipment that especially a lot of the results exist. We have aimed at the introduction of the vibration diagnosis technology in Japan since fast time (middle of the 1970's), and are working on the commercialization of the dia gnostic system positively. Here, i...
英字タイトル:
Condition Monitoring System by vibration method
第7回
2.4GHz帯の無線による原子力発電所内でのデータ伝送の検討
著者:
辻 建二,Kenji TSUJI,増田 亮太,Ryota MASUDA,福井 琢也,Takuya HUKUI
発刊日:
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Additional monitoring is occasionally done on suspicious equipment such as pumps, motors, valves and so on, when monitoring parameters are dif ferent from normal operation in Nuclear Power Plant. To avoid excess radiation exposure during arrangements for the additional monitoring requ iring sensors installation and cables layout, wireless data transmission system is desired. ZigBee system, which uses 2.4GHz radio frequency a nd has repeating function, is suitable for the needs above without influencing on ...
英字タイトル:
Study on DATA transmission by 2.4GHz radio frequency in Nuclear Power Plant
第7回
3Dレーザ計測技術の活用
著者:
西谷 順一,Junichi NISHITANI,山上 真広,Mahiro YAMAGAMI,田中 俊二,Syunji TANAKA,岩田 知和,Tomokazu IWATA,中尾 文俊,Fumitoshi NAKAO,中島 和人,Kazuhito NAKASHIMA
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Mitsubishi Heavy Industry inc.(MHI) has widely evaluated design of configuration and piping, i nterference check, workability, work plan by utilize as-built data (using 3D laser scanner) of some compornent and piping etc. set up in Atomic Power Plants(APPs).This paper introduces some definite applied instance of results obtained by 3D laser scan in which MHI has been engaged....
英字タイトル:
Application of 3D Laser scan Technique on MHI
第7回
950keVライナックX線源によるその場検査用X線測定システム
著者:
山本 智彦,Tomohiko YAMAMOTO,藤原 健,Takeshi FUJIWARA,上坂 充,Mitsuru UESAKA,平井 俊輔,Shunsuke HIRAI
発刊日:
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キーワードタグ:
We have been developed 9.4 GHz X-Band linac and 250kW magnetron for X-ray nondestructive tes ting system for Condition Based Maintenance (CBM). Our linac's energy is 950 keV, which fits to Japanese regulation to take them to outside of radiation controlled area. This small port able linac enables to diagnosis the moving facility, such as bearing in Nuclear Power Plants....
英字タイトル:
Development of 960keV X-Band Linac for Portable Nondestructive Testing System
第7回
BWR の高経年・耐震評価における産学協同について
著者:
鈴木 俊一,Shunich SUZUKI
発刊日:
公開日:
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In recent years, the formulation of reasonable methodologies to manage and evaluate the safety and integrity of aging nuclear power facilities is the matter of importance for Japanese power utilities to secure stable power supply i n the next few decades. Among possible concerns about aging problems, stress corrosion cracking (SCC) is the one of critical problems to ensure the integrity of boiling water reactors (BWR) and extensive R&D activities are being co nducted.The seismic reliability of nuclear powe...
英字タイトル:
Academic-Industry Partnership in R&D Activities on Aging Management and Seismic Reliability Evaluation of BWRs
第7回
BWR配管内の混合ガス燃焼に関するガイドラインの整備
著者:
稲垣 哲彦,Tetsuhiko INAGAKI,西川 覚,Akira NISHIKAWA,坂下 彰浩,Akihiro SAKASHITA,堂崎 浩二,Koji DOZAKI,曽根 孝浩,Takahiro SONE,日高 章隆,Akitaka HIDAKA
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The pipe rupture accidents due to combustion of radiolysis gas in BWR piping occurred in 2001. TENPES and JANTI got “The design guideline to prevent pipe rupture accident due to combustion of radiolysis gas in BWR piping” ready and proposed about ideal method of the piping placement design to BWR. This report is the summary of the method to evaluate the possibility of accu mulation of radiolysis gas in BWR piping which is mentioned in the guideline....
英字タイトル:
The development of the guideline to prevent combustion of radiolysis gas inBWR piping
第7回
CRDスタブチューブ溶接部の封止溶接技術の開発
著者:
田中 賢彰,Masaaki TANAKA,伊東 敬,Takashi ITO,松本 耕一,Koichi MATSUMOTO,馬原 陽一,Yoichi MAHARA
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Seal welding is a repair method when crack by Stress Corrosion Cracking (SCC) is found in weld rtion of core internals including pressure b oundary component in nuclear power plant. Seal lding is welded directly on surface of existing SCC crack and prevents SCC propagation by la ting SCC crack from reactor water environment. In this study, development of seal welding hnology using automatic TIG Welding was executed, and the applicability of seal welding method CRD stub-tube weld portion was confirmed by ex...
英字タイトル:
Development of Seal Welding Repair Technology for CRD Stub-tube
第7回
Defects Sizing Using a Pulsed Eddy Current Testing Method for Local Wall-Thinning Evaluation
著者:
Shejuan XIE Student,Toshiyuki TAKAGI,Tetsuya UCHIMOTO
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The thickness of a plate is to be evaluated Introductionfrom the top surface of the plate. Keywords: Local wall-thinning, Pulsed ECT, Magnetic sensor, Feature extraction, Sizingand width. The thickness of a plate is to be evaluated from the top surface of the plate.To simulate the small area wall-thinning on the inner surface of a pipe, five AISI316 austenitic stainless steel flat plates with a slot defect were prepared in our ex periments. The size of the five plates is the same, 120mm in length, 100mm i...
英字タイトル:
Defects Sizing Using a Pulsed Eddy Current Testing Method forLocal Wall-Thinning Evaluation
第7回
Effects of Electrochemical Parameters on SCC of Stainless Steels in Simulated BWR Environments
著者:
Zhanpeng Lu, Tetsuo Shoji, Kazuhiko Sakaguchi, Fanjiang Meng, Yubing Qiu
発刊日:
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The effects of electrochemical parameters in terms of electrochemical potential on stress corrosion cracking growth rates of au stenitic stainless steels in high temperature pure water are analyzed based on obtained experimental results and reported data. The effect of decreasing electrochemical potential is more significant in non-hardened sensitized and non-hardened stainless s teels than that in strain-hardened stainless steels, which is also supported by the results of Ni-base alloys and weld metals....
英字タイトル:
Effects of Electrochemical Parameters on SCC of Stainless Steels inSimulated BWR Environments
第7回
Electrochemical response of scratched Alloy 600 in simulated primary water and its influence with hydrogen entry
著者:
Fanjiang Meng,Zhanpeng Lu,Tetsuo Shoji,Jianqiu Wang ,En-Hou Han
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The effect of scratches on oxidation evolution of Alloy 600 was monitored by EIS in 290A°C simulated primary water. EIS result indicates that oxide film reached a stable condition until 7 days' immersion. The scratched Alloy 600 possessed almost the same evolution of oxide film with plain specimens. Anodic polarization was pe rformed to study combined effect of scratches and charged hydrogen. The anodic current changes of scratched A lloy 600 after hydrogen charging were not the simple superimposition bet...
英字タイトル:
Electrochemical response of scratched Alloy 600 in simulated primary waterand its influence with hydrogen entry