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第17回
イオン照射したステンレス鋼モデル合金に形成される 溶質原子クラスタの硬化寄与の検討
著者:
福元 謙一,（福井大）,馬渕 貴魁彰,（MHINS）
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An experiment of post-irradiated annealing for ion-irradiated stainless steel model alloy was performed to investigate the mechanical changes and microstructural changes by using nano-indenter, TEM observation and 3DAP measurement. The thermal stability and barrier factor strength of solute atom clusters formed by ion irradiation were evaluated....
英字タイトル:
Study about irradiation hardening contribution of solute atomic cluster formed in ion-irradiated stainless steel model alloys
第17回
グローバルな視点に基づいた原子力安全マネジメント
著者:
関村 直人,（東京大）
発刊日:
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キーワードタグ:
The Fukushima Daiichi accident has affected nuclear energy strategy in different countries in different ways and to different extents. Global community continued to discuss and update concepts and actions for continuous improvement of nuclear safety based upon excellent level of management in nuclear sectors. Some examples of outcomes in international organizations are discussed in this paper to contribute management systems to cope with complexity of the issues in Japan. Considering responsibility and impu...
英字タイトル:
Management of Nuclear Safety from Global Viewpoints
第17回
ケーブルルート実証技術の開発
著者:
西村 達仁,岩崎 盛久,山田 穣,佐藤 善美,川副 英次,（東芝プラントシステム）
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We aim at the unitary management of information relevant to design, construction and maintenance of cables and circuits in the context of information that should be controlled are widespread as well as are required to comply with nuclear-specific requirements such as seismic, radiation resistance and system isolation. In nuclear-specific requirement, not only cabling “from-to” management but also cable route (laid on what stage of cable tray etc.) management is required, but the only method we implement cur...
英字タイトル:
Development of the cable route demonstration technology
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
第17回
デジタル打音検査を用いたコンクリート構造物の診断技術開発
著者:
尾崎 俊彦,竹内 由紀,木村 元,（国土交通省）,栗山 廣志,宮城 大助,（中央復建コンサルタンツ）,天野 俊一,（テイコク）,藤吉 宏彰,松永 嵩,礒部 仁博,（原燃工）
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In this paper, we discuss the results of application of “Integrated system of digital hammering inspection and digital visual inspection” to the detectability of flacking, cracks and backside cavities of the tunnel lining as well as flacking and backside cavities of concrete paving in a national highway tunnel....
英字タイトル:
Development of diagnostic technology for concrete structures using digital hammering inspection
第17回
ナトリウム機器ステンレス鋼溶接部の欠陥数密度評価
著者:
豊田 晃大,橋立 竜太,矢田 浩基,高屋 茂,宮越 博幸,加藤 章一,（JAEA）
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Probabilistic fracture mechanics (PFM) evaluation requires information on the probabilistic distributions of the number and size of initial defects, material properties such as crack growth rate due to fatigue and creep, and load to evaluate the failure probability of components. In this study, ultrasonic testing was conducted on the welds of the test equipment used in the research and development of fast reactors, and the number and size of defects were evaluated. The results could be used as conservative ...
英字タイトル:
Evaluation of Defect Number Density in Sodium Equipment Stainless Steel Welds
第17回
ホットセル負圧制御用空気圧縮機の更新による運転保守管理の改善
著者:
磯﨑 涼佑,坂本 直樹,（JAEA）
発刊日:
公開日:
キーワードタグ:
核燃料物質使用施設のホットセル負圧制御用として使用している空気圧縮機について、高経年化により機能低下の兆候が見られたので更新した。更新機種は、運転情報を電子データに記録できるものを選定し、 これらデータを活用した運転保守管理の改善を図った。...
第17回
リスク情報を活用した保全の合理化に向けた定量的なリスク評価の 必要性を判定する簡易スクリーニング手法の提案
著者:
橋立 竜太,矢田 浩基,高屋 茂,二神 敏,山野 秀将,栗坂 健一,江沼 康弘,（JAEA）
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公開日:
キーワードタグ:
If components can be maintained according to a target reliability of nuclear power plants, plant safety and economic efficiency could be improved by avoiding excessive or insufficient margins. This approach can rationalize the maintenance of low target reliability components and concentrate resources (people, money, and time) on the maintenance of high target reliability components. It would take a long time to evaluate the target reliability for all components in the plant by quantitatively using probabili...
英字タイトル:
Proposal of a Simple Screening Method Which Determines Necessity of Quantitative Risk Assessment for Maintenance Rationalization Using Risk Information
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