102件が見つかりました。

並び替え
・
第2回
Computational Method in Building Database for Crack shape Recovery Arising in Eddy Current Testing
著者:
Fumio KOJIMA
発刊日:
公開日:
キーワードタグ:
Abstract: This paper is concerned with computational method in building database, called ECT data base, which is used in crack shape recovery arising in eddy current testing. Firstly, ECT simulat ion model with nodal-based FEM is introduced. Secondly, computational method using parallel virt ual machine in building ECT database is overviewed. Finally, usage of this database is discussed....
英字タイトル:
Computational Method in Building Database for Crack shape Recovery Arising in Eddy Current Testing
第2回
Recent Accomplishment in Ultrasonic Health Monitoring for Nuclear Power Plants
著者:
Min-Rae Lee,Youn-Ho Cho
発刊日:
公開日:
キーワードタグ:
Today's NPPs follow prescriptive requirements for maintenance and inspection of components, structures, and systems. While many of these requirements are derived from several decades of operational experience, they nonetheless do not take into consider ation the actual equipment conditions in determining the need for maintenance and operational adjustments. Continuous condition monitoring in current nuclear power plants is limited to sensor technologies that must be applied externally to already exi sting ...
英字タイトル:
Recent Accomplishment in Ultrasonic Health Monitoring for Nuclear Power Plants
第2回
3WR炉内構造物のニッケル基合金溶接部に発見された応力腐食割れの超音波探傷試験結果とその評価
著者:
青木 孝行,Takayuki AOKI,小林 広幸,Hiroyuki KOBAYSHI,樋口 真一,Shinichi HIGUCHI,清水 禎人,Sadato SHIMIZU
発刊日:
公開日:
キーワードタグ:
A Ni-base alloy weld, including cracks due to stress corrosion cracking found in the reactor internal of the oldest BWR in Japan, Tsuruga unit 1, in 1999, was examined by three (3) types of UT method. After this examination, a depth of each crack was confirmed by carrying out a little excavation with a grinder and PT examination by turns until each crack Hisappeared. Then, the depth measured by the former method was comp ared with the one measured by the latter method. n this fashion, performances of the ...
英字タイトル:
Evaluation on Ultrasonic Examination Methods applied to Ni-base Alloy Weld including Cracks dueto Stress Corrosion Cracking found in BWR Reactor Internal
第2回
?超音波探傷試験における簡便な傷サイジング手法の提案
著者:
福冨 広幸,Hiroyuki FUKUTOMI,林 山,Shan LIN,緒方 隆志,Takashi OGATA
発刊日:
公開日:
キーワードタグ:
Abstract This paper describes a new crack tip diffraction approach using a set of angle beam and direct contact transducers. In this approach, a crack height is calculated from a time di fference from two echoes of a tip-diffracted longitudinal wave, which arise after an incident wave from the angle beam transducer impinges the crack. The two echoes are detected by the d irect contact transducer which lies on the opposite surface of and over the crack. One echo is related to the wave traveling directly fro...
英字タイトル:
Proposal of Concise Crack Sizing Approach in Ultrasonics
第2回
A Survey on the Maintenance Demand of Nuclear Power Plants in Korea
著者:
Jun Seok LEE,Poong Hyun SEONG,Chang Heui JANG,Hyuk Soon LIM,Jang Hwan NA,Seong Jong OH
発刊日:
公開日:
キーワードタグ:
This work presents the maintenance demand of nuclear power plants (NPPs) in Korea. The NPP companies have been targeting to the improvement of their productivity and they have considered the maintenance technology development. For the development, a survey on the maintenance demand is important. In this work, a questionnaire method is employed to know the operator and staff's opinions who involve in maintenance works in NPPs. The contents of the questionnaire are t he present state of the maintenance in Ko...
英字タイトル:
A Survey on the Maintenance Demand of Nuclear Power Plants in Korea
第2回
Advanced Nondestructive Inspection Methods for Turbine Field Service
著者:
Hans RAUSCHENBACH,Dr. Michael OPHEYS,Michael CLOSSEN- VON LANKEN SCHULZ,Michael SIEGEL
発刊日:
公開日:
キーワードタグ:
International competition in the field of power generation is increasing and customers are demanding economic and efficient power plants. In the long term, continuous power plant availability can only be guaranteed through an effective mode of operation in conjunction with a systematic maintenance and inspection concept. Apart from boiler, steam piping and valves, the rotating components of the turbine/g enerator (turbine and generator rotor) also belong to the most highly stressed components in a power pl...
英字タイトル:
Advanced Nondestructive Inspection Methods for Turbine Field Service
第2回
BWR の保全活動におけるコストおよびリスクの同時評価手法の構築
著者:
白石 夏樹,Natsuki SHIRAISHI,高橋 信,Makoto TAKAHASHI,橋爪 秀利,Hidetoshi HASHIZUME
発刊日:
公開日:
キーワードタグ:
The purpose of this study is to develop an evaluation method to optimize both cost and risk in maintenance strategy of BWR plant in long-term operation. Plant operation is simulated in a simplified model, and the condition of the components treated in the model are evaluated statistically with Monte Carlo simulation. While Probabilistic Safety Assessment(PSA) methods such as Fault Tree Analy sis(FTA), Event Tree Analysis(ETA), and Failure Mode and Effects Analysis(FMEA) are also used to estimate Core Damag...
英字タイトル:
Development of an Evaluation Method for Cost and Risk in Maintenance Strategy of BWR
第2回
BWR 環境下で長時間使用されたニッケル基合金の応力腐食割れの特徴
著者:
住本 秀樹,Hideki SUMIMOTO
発刊日:
公開日:
キーワードタグ:
1. 緒言炉内構造物は安全上重要な機器であり、必要かつ十 分な評価を実施し、その結果を踏まえて適切に維持管 理することが重要である。特に長期的な展望に立って 高経年化評価を実施する場合には、実環境で長期間使 用された材料の特性を把握し、その結果を踏まえて評 価することが望まれる。 - 本報告では、運転開始後約 30 年を経過した国内 BWR プラントにおいて、1999 年 12 月に炉内構造物 の一つであるシュラウドサポートに発見されたき裂部 の各種調査結果を整理、評価し、それから得られた知 見を踏まえて......
英字タイトル:
Investigation of Stress Corrosion Cracking in Ni-base Alloy Used for a Long Time in a BWR
第2回
BWRプラント再循環系配管溶接部の硬化パラメータの測定と
著者:
鈴木 俊一,Shunichi SUZUKI,熊谷 克彦,Katsuhiko KUMAGAI,浅野 恭一,Kyoichi ASANO
発刊日:
公開日:
キーワードタグ:
It becomes to be recognized that material hardening can enhances the SCC growth rate considerably. In SCC growth evaluation in PLR weld joints of BWR, it is confirmed that the material hardening due to thermal shrinkage during welding affects SCC growth rate. In order to ev aluate the degree of hardening of PLR weld joints, Vickers hardness distributions have been measured on some actual pipe joints. In latest researches, however, another parameters such as yield strength and plastic strain are considered ...
第2回
BWRプラント再循環系配管溶接部の硬化パラメータの測定と
著者:
鈴木 俊一,Shunichi SUZUKI,熊谷 克彦,Katsuhiko KUMAGAI,浅野 恭一,Kyoichi ASANO
発刊日:
公開日:
キーワードタグ:
It becomes to be recognized that material hardening can enhances the SCC growth rate considerably. In SCC growth evaluation in PLR weld joints of BWR, it is confirmed that the material hardening due to thermal shrinkage during welding affects SCC growth rate. In order to ev aluate the degree of hardening of PLR weld joints, Vickers hardness distributions have been measured on some actual pipe joints. In latest researches, however, another parameters such as yield strength and plastic strain are considered ...
Copyright © 2019 保全技術アーカイブ - サイトポリシー