第15回
AEセンサを用いた埋込金物検査 その1 モックアップ試験
著者:
三浦 進,関口 昭司,服部 功三,(日本原燃),小川 良太,藤吉 宏彰,礒部 仁博,(原燃工)
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Non-destructive testing technique was developed for embedded hardware using acoustic emission sensors. In this technique, AE sensor records the acoustic vibration generated by striking the embedded hardware with a hammer. The fixed state of the embedded hardware is judged from the vibration time of the embedded hardware recorded by the AE sensor and the frequency distribution of the acoustic signal. Mockup tests and FEM analysis were carried out in order to verify the effectiveness of the technique....
英字タイトル:
Embedded hardware inspection using AE sensor Part1 Mockup tests
第15回
AEセンサを用いた埋込金物検査 その2 現場検査
著者:
三浦 進,関口 昭司,服部 功三,(日本原燃),小川 良太,匂坂 充行,礒部 仁博,(原燃工)
発刊日:
公開日:
キーワードタグ:
Non-destructive testing technique was developed for embedded hardware using acoustic emission sensors. In this technique, the fixed state of the embedded hardware can be judged from the vibration time and the frequency distribution of the acoustic signal. In this report, we introduce inspection method and analysis method at site and the application result of JNFL by nondestructive inspection technology of embedded hardware using AE sensor....
英字タイトル:
Embedded hardware inspection using AE sensor Part2 Site inspection
第16回
AEセンサを用いた弁診断の取組み
著者:
小川 良太,匂坂 充行,桑島 翔,松永 嵩,礒部 仁博,(原燃工),服部 功三,工藤 盛雄,三浦 進,(日本原燃)
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The maintenance of valves used in nuclear facilities (check valves, ball valves, gate valves, butterfly valves, etc.) is carried out by daily checking and overhaul. However, it is not easy to diagnose the inside status of these valves such as open-close performance and internal leakage. In this report, our approaches are shown to develop valve diagnosis by acoustic measurement using AE (Acoustic Emission) sensor through test loop examinations and the field applications....
英字タイトル:
Development of valve diagnosis using AE sensor
第16回
FRPの健全性診断に向けた非破壊検査システム開発
著者:
藤吉 宏彰,石井 元武,礒部 仁博,(原燃工),川島 崇利,(関西電子ビーム),浦島 千裕,岡 隆之,鈎 忠志,(関西電力)
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Fiber reinforced plastic (FRP) is used in a wide range of applications due to its light weight, high strength, excellent corrosion resistance and flexible processability. Although nuclear power plants may have a chance to use FRP as structural and equipment materials in the future, its radiation effect is not well known so far. Thus, we tried to evaluate its radiation degradation non-destructively using "AE (Acoustic Emission) digital hammering inspection". Two types of FRP test specimens of glass fiber and...
英字タイトル:
Development of nondestructive inspection system for soundness diagnosis of FRP
第15回
i-Construction 新技術現場試行: AEセンサを用いた打音検査によるコンクリート施工品質評価
著者:
礒部 仁博,松永 嵩,匂坂 充行,小川 良太,藤吉 宏彰,下田 彩子,(原燃工)
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On-site trial of a new technology of i-Construction was successfully carried out for the quality control of concrete construction through hammering inspection using AE sensor. In addition, some mockup tests showed that the inspection has a potential to identify several defects and compressive strength of concrete....
英字タイトル:
On-site trial of a new technology of i-Construction: Quality control of concrete construction through hammering inspection using AE sensor
第15回
ケーブル絶縁材の健全性診断に向けた非破壊検査システム開発
著者:
藤吉 宏彰,礒部 仁博,(原燃工),川島 崇利,(関西電子ビーム),浦島 千裕,鈎 忠志,(関西電力)
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Insulation degradation of cable insulation causes fire due to electric leakage. Cable insulating materials laid in nuclear power plants deteriorate over time, heat and influence of radiation. Here we investigated the degradation tendency of insulating materials by radiation irradiation by hammering inspection using AE sensor. As a result, for any cable insulation material, curing of insulating material with irradiation could be detected as a change in natural frequency. From here, the applicability of AE ha...
英字タイトル:
Development of nondestructive inspection system for soundness diagnosis of cable insulating material
第16回
ケーブル絶縁材の健全性診断に向けた非破壊検査システム開発(2)
著者:
石井 元武,藤吉 宏彰,礒部 仁博,(原燃工),川島 崇利,(関西電子ビーム),浦島 千裕,岡 隆之,鈎 忠志,(関西電力)
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We reported previously the deterioration tendency of cable insulation materials used in nuclear power plants due to irradiation and the applicability of AE (Acoustic Emission) digital hammering inspection to detect the deterioration nondestructively by comparing the natural frequencies before and after the irradiation. In this study, we selected two kinds of triple core cables which are often utilized in nuclear power plants. The natural peak frequency increased due to the increase of irradiation dose, and ...
英字タイトル:
Development of nondestructive inspection system for soundness diagnosis of cable insulating material (2)
第17回
ケーブル絶縁材の健全性診断に向けた非破壊検査システム開発(3)
著者:
石井 元武,藤吉 宏彰,礒部 仁博,(原燃工),川島 崇利,(関西電子ビーム),冨宅 ゆかり,藤崎 恭史,大本 正人,(関西電力)
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We have researched radiation-induced deterioration behaviors of cable insulation materials used in nuclear power plants and a nondestructive inspection method to detect the behaviors in our past reports. The deterioration was generated by electron beam irradiation simulating gamma-ray irradiation in the field. As a result, we found it possible to detect the deterioration by comparing the natural frequencies of the cables before and after the irradiation through our original digital hammering inspection tech...
英字タイトル:
Development of nondestructive inspection system for soundness diagnosis of cable insulating material (3)
第17回
デジタル打音検査とAI・シミュレーションの統合的活用による コンクリート内部構造診断の実現 (1)AIによる順問題解析
著者:
匂坂 充行,松永 嵩,小川 良太,礒部 仁博,(原燃工),吉村忍,山田知典,(東京大)
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In the future social infrastructure diagnosis for concrete structures such as bridges, tunnels and buildings, it is expected that the digital hammering inspection, which is objective, quantitative, and recordable to the conventional hammering inspection, will play a significant role. However, since there are a wide variety of defects due to poor construction and age-related deteriorations in the concrete structures, they have not been quantitatively identified enough by the digital hammering inspection in t...
英字タイトル:
A study on internal structure diagnosis of concrete structures incorporated with digital hammering inspection, AI and simulation technologies (1) Direct problem analysis using AI
第17回
デジタル打音検査とAI・シミュレーションの統合的活用による コンクリート内部構造診断の実現 (2)AIによる逆問題解析
著者:
松永 嵩,小川 良太,匂坂 充行,礒部 仁博,(原燃工),吉村 忍,山田 知典,(東京大)
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One of the most common inspection methods for concrete structures is hammering inspection. While this method makes it possible to quickly inspect a vast number of inspection targets, it has the problem of lacking objectivity of judgment results and recordability. In this study, we aimed to develop a technology to quantitatively diagnose the internal structure of concrete structures by digital hammering inspection. The approach of the research was to build an AI trained by CNN with a database that relates th...
英字タイトル:
A study on internal structure diagnosis of concrete structures incorporated with digital hammering inspection, AI and simulation technologies (2) Inverse problem analysis using AI