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第13回
補修技術活用推進検討会の状況について
著者:
青木 孝行,Takayuki AOKI,小山 幸司,Koji KOYAMA,堂﨑 浩二,Koji DOZAKI,庄司 卓,Takashi SHOJI,渡士 克己,Katsumi WATASHI,菅野 眞紀,Masanori KANNO,小林 広幸,Hiroyuki KOBAYASHI
発刊日:
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キーワードタグ:
Working Group on Application Enhancement of Repair Replacement Technology has been established since September 2015, for the purpose of studying specific measures to create an environment that Japanese utilities can easily make corrective actions such as repair replacement technology applicable to Nuclear Power Plant to improve the safety of their own plants, and meetings have been held five times until the end of April 2016. In this paper, discussions on the WG meetings so far are shown, as well as th...
英字タイトル:
Current Status of WG on Application Enhancement of Repair Replacement Technology
第13回
複雑システムの安全設計と事故モデルについて
著者:
兼本 茂,Shigeru KANEMOTO
発刊日:
公開日:
キーワードタグ:
The present paper discusses a concept of safety design and accident models in complex systems. Modern artifacts or engineering products in our daily life are usually controlled by embedded computers and inevitably connected to Internet. Due to big progress of computer hardware and software performance, control algorithms become more and more sophisticated, intelligent and complex. This makes difficult to assure the safety of the system. Since the current safety assessment tools such as FTA/ETA, FMEA o...
英字タイトル:
Safety Design and Reliability Management of Complex Systems
第13回
計算科学シミュレーションコード による レーザーコーティング条件の導出
著者:
村松 壽晴,Toshiharu MURAMATSU,吉氏 崇浩,Takahiro YOSHIUJI
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A general-purpose three-dimensional thermohydraulics numerical simulation code SPLICE was developed at Japan Atomic Energy Agency and designed to deal with gas-liquid-solid consolidated incompressible viscous flows with a phase change process in various laser applications, such as welding, coating, cutting, etc. The result obtained from laser coating simulations is very encouraging in the sense that the SPLICE code would be used as one of efficient tools to provide the laser coating irradiation conditio...
英字タイトル:
Provision of Laser Coating Irradiation Conditions with a Computational Science Simulation Code SPLICE
第13回
試薬系統配管保守用の簡易アイスプラグ施工技術
著者:
尾形 曜,Hikaru OGATA,市川 友博,Tomohiro ICHIKAWA,野田 静枝,Shizue NODA,古川 敬士,Keishi FURUKAWA,加賀谷 忍,Shinobu KAGAYA,喜多 健太朗,Kentaroh KITA
発刊日:
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In order to keep stable and continuous operation of the power plants or chemical plants, an ice plug technology are often introduced to them specially for the room temperature water pipe, because of this effect to reduce volume of drainage and the isolation range. Water in the pipe are frozen from outside with liquid nitrogen as coolant, and this pipe is closed with this frozen water as called “ice plug effect” which generates the adhesive and the frictional force at the inner surface of the pipe. There...
英字タイトル:
Ice plug application technology for the maintenance of chemical reagent pipe system
第13回
超伝導電磁超音波送信システムの構築と数値解析による超音波送信特性の定量的評価
著者:
時田 祐樹,Yuki TOKITA,内一 哲哉,Tetsuya UCHIMOTO,高木 敏行,Toshiyuki TAKAGI,小原 良和,Yoshikazu OHARA
発刊日:
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キーワードタグ:
In this study, superconducting electromagnetic acoustic transducer (EMAT) is developed to transmit strong ultrasound, which is expected as an experimental tool for mechanism study of nonlinear ultrasound. For the purpose, EMAT experiment is carried out using uniform and strong filed generated by a superconducting magnet, and surface displacement of specimen is measured by a laser Doppler vibrometer. As the result, the linear relationship between the surface displacement and magnetic flux density was co...
英字タイトル:
Development of superconducting electromagnetic acoustic transducer system and quantitative evaluation of ultrasound transmission by numerical analysis
第13回
超音波探傷訓練ツールへ向けたシミュレーション解析 における欠陥モデルの検討
著者:
水野 亮二,Ryoji MIZUNO,上山 芳教,Yoshinori KAMIYAMA,古川 敬,Takashi FURUKAWA
発刊日:
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キーワードタグ:
In ultrasonic testing for austenitic welds, it is generally said that the flaw detection in the weld is difficult because of spurious echoes by dispersion of the ultrasonic wave. Therefore, the ultrasonic examination personnel are required to have high level abilities to classify these echoes. It is important to train to maintain and improve the abilities. For the effective training, many samples are need with a variety of flaw characteristics and size. However, it is difficult to prepare such samples...
英字タイトル:
Defect Model in TU simulation for UT training tool
第13回
超音波探傷試験技術者に対する教育・訓練の有効性検討
著者:
平澤 泰治,Taiji HIRASAWA,小林 輝男,Teruo KOBAYASHI,牧原 善次,Zenji MAKIHARA,南 康雄,Yasuo MINAMI
発刊日:
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The ultrasonic testing (UT) has been carried out according to the JEAC 4207 in our country’s ISI. In this code, though the ultrasonic personnel are required to the education and training concerning the UT of ISI in the nuclear power plant, the detail contents of these items are not described. Therefore, the ultrasonic personnel are trained to learn and maintain high-level skills such as defect detection, classification of defect echoes and so on, using the own training program of the inspection compani...
英字タイトル:
Investigation of Effectiveness of Education and Training for Ultrasonic Personnel
第13回
軽水炉プラント停止期間中における Ni 基合金溶接金属の SCC 亀裂進展可能性評価
著者:
酒井 裕介,Yusuke SAKAI,熊谷 克彦,Katsuhiko KUMAGAI,深谷 祐一,Yuichi FUKAYA,神長 貴幸,Takayuki KAMINAGA
発刊日:
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キーワードタグ:
Experimental evaluations were conducted to verify whether the significant SCC growth is possible or not in Ni base weld metals during cold shutdown period of light-water reactors. As a result, it has been confirmed that the SCC growth rate decreases with decreasing temperature and the growth rate below 100 °C is low enough to be neglected in plant evaluations. ...
英字タイトル:
Evaluation of SCC growth susceptibility of Ni base alloy weld metal during the shutdown period of Light-water reactors
第13回
軽水炉保全最適化のための統合型シミュレータ Dr. Mainte による ヒューマンエラーの影響とその低減効果の検討 2
著者:
礒部 仁博,Yoshihiro ISOBE,匂坂 充行,Mitsuyuki SAGISAKA,小川 良太,Ryota OGAWA,松永 嵩,Takashi MATSUNAGA,高坂 徹,Toru KOSAKA,松本 聡司,Satoshi MATSUMOTO,吉村 忍,Shinobu YOSHIMURA
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Dr. Mainte, an integrated simulator for maintenance optimization of LWRs (Light Water Reactors) has been developed based on PFM (Probabilistic Fracture Mechanics) analyses in terms of safety, availability and economic efficiency, environmental impact and social acceptance. For the further improvement of maintenance activities, the importance of reducing human errors is often pointed out. Human errors are well recognized to be affected by mental stress conditions. Due to the amendment of Industrial Safe...
英字タイトル:
Effects of Human Error and its Reduction Analyzed by Dr. Mainte, Integrated Simulator of Maintenance Optimization of LWRs 2
第13回
過酷事故対応のドライウェル冷却器の除熱特性
著者:
石田 直行,Naoyuki ISHIDA,綿引 直久,Naohisa WATAHIKI,細井 秀章,Hideaki HOSOI,渡邉 亮平,Ryohei WATANABE,佐藤 大樹,Daiki SATO
発刊日:
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日立 GE 安藤 浩二 Kouji ANDOU Non-Member The new dry-well cooler (DWC) for a severe accident has been developed to avoid release of radioactive materials to environment caused by primary containment vessel failure. The DWC can be operated using natural driving force to remove decay heat. The element tests using copper tube bundle with 3 rows and 5 levels were conducted under existing nuclear power plant conditions to estimate heat removal ratio with non-condensable gas (N2) and to confirm occurrence of natu...
英字タイトル:
Heat Removal Characteristics of Dry-well Cooler for a Severe Accident
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