189件が見つかりました。

並び替え
第16回
3-D Imaging of Cracks in Metal Plate with Guided Waves Generated by Angle Adjustable Ultrasonic Probe
著者:
Bo FENG,Artur RIBEIRO,Helena RAMOS ,(リスボン大)
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The use of guided Lamb waves in nondestructive testing allows a faster and more sensitive inspection when compared with other ultrasound techniques. The process is not easy to carry on because of the multimodal and dispersive nature of guided Lamb waves. This paper explains all the procedures to image linear defects machined in an aluminum plate in detail. An angle adjustable ultrasonic transducer was used to generate the Lamb guided wave for inspection. The technique is effectively able to determine the po...
英字タイトル:
3-D Imaging of Cracks in Metal Plate with Guided Waves Generated by Angle Adjustable Ultrasonic Probe
第16回
3D-CFD&FEMを用いたPTS時のRPV構造健全性評価と保全最適化
著者:
阮 小勇,水田 航平,中筋 俊樹,森下 和功,(京都大)
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The structural integrity of reactor pressure vessels (RPVs) is an important issue in the field of nuclear power plants. The RPV contains a reactor core, which is impossible to substitute. The pressurized thermal shock (PTS) loading is a critical issue in assessing the safety of RPV. The most severe situation takes places during cold water injection in the cold legs when the emergency core cooling system (ECCS) is operated due to LOCA. Under these circumstances, the PTS loading may lead the RPV to brittle fr...
英字タイトル:
3D-CFD and FEM Based Deterministic PTS Analysis for Optimizing RPV Maintenance Strategy
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
AIを活用した圧力容器鋼中性子照射脆化予測の高度化
著者:
中筋 俊樹,森下 和功,(京都大)
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In order to keep nuclear safety, management of irradiation embrittlement of LWR pressure vessel steels is the one of important issues. In this study, we focus on the prediction of irradiation embrittlement. Conventionally, irradiation embrittlement prediction is performed by a numerical model based on the mechanism. In recent years, research in fields such as AI and Bayesian statistics has rapidly progressed. Therefore, in this study, in order to advance the irradiation embrittlement prediction, the irradia...
英字タイトル:
Modeling for Prediction of Irradiation Embrittlement of RPV steels using AI
第16回
AR技術を活用した保全業務支援ツールの開発(その2)
著者:
大島 朋美,尾崎 健司,西 優弥,吉田 光明,亀井 政昭,(東芝ESS)
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New inspection system is supposed to be introduced in nuclear power plants in Japan. In the corrective action program (CAP) based on quality management system、 sharing of nonconformity information、management of corrective and preventative action are required. For management of the corrective action、relevant data have to be correctly and efficiently recorded and managed. In order to address the new system、we developed a maintenance support tool using augmented reality (AR) technology. This tool helps users i...
英字タイトル:
Development of a Maintenance Supporting Tool Using Augmented Reality Technology(2)
第16回
BWRにおけるステンレス鋼鋳鋼製機器の熱時効評価の技術基盤
著者:
新井 拓,三浦 靖史,澤部 孝史,別役 潔,(電中研)
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Aging management technical evaluation is required for LWRs every 10 years at and after 30 years operation in Japan. Thermal aging evaluation of austenitic cast stainless steel components is one of the items of aging evaluation. Technical basis of thermal aging evaluation for BWR components such as thermal aging behavior of cast stainless steel used in Japanese BWRs, applicability of thermal aging prediction models and basic way of integrity evaluation of the components are described in this paper....
英字タイトル:
Technical basis of thermal aging evaluation of stainless steel cast steel components in BWR
第16回
CdTeピクセル検出器と放射光白色X線による応力評価への挑戦
著者:
鈴木 賢治,(新潟大),城 鮎美,(量研機構),豊川 秀訓,佐治 超爾,(高輝度光科学研究センター),菖蒲 敬久,(JAEA)
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In this study, we proposed a double exposure method using synchrotron white X-rays (DEM-WX) to measure strains of coarse-grained materials, and examined its feasibility. The X-ray diffractions were measured by a CdTe pixel detector. The CdTe pixel detector can resolve photon energy by changing a threshold voltage. Calibrating each pixel of the detector using characteristic X-rays of Pb and W foils, the images by threshold X-ray energy were obtained. The difference image, which is like a diffraction image wi...
英字タイトル:
Feasibility Study on Stress Measurements using CdTe Pixel Detector and Synchrotron White X-Rays
第16回
Checking of storage pools liners with underwater robot
著者:
FORTIN Olivier,(Orano Cycle Japan Projects)
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At Orano La Hague reprocessing plant, in the frame of inspections to be made on the installations to ensure the conformity of equipment, development of specific tools for areas with difficulties of access is an issue (hot cells, storage pools ...). An underwater robot aiming to verify fuel storage pools liners by ultrasonic measurement is under development by Orano engineering team...
英字タイトル:
Checking of storage pools liners with underwater robot
第16回
Determining the 2D eddy current distribution with magnetic field measurements on two different directions
著者:
Dario PASADAS,Helena RAMOS,Artur RIBEIRO,(リスボン大)
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The magnetic field sensors based on the tunnel magneto-resistive effect (TMR) present enhanced characteristics such as the high sensitivity and a good linearity. They can distinguish the two orientations along a single direction of measurement and don’t need a DC field to set the working point. In this article we shall use TMRs to measure the small magnetic field in the context of an eddy current inspection of a planar aluminum material. The magnetic field disturbance due to the presence of a flaw is measur...
英字タイトル:
Determining the 2D eddy current distribution with magnetic field measurements on two different directions
第16回
EMATによる超音波の送受信に関する電磁相互作用を考慮したFEMシミュレーション
著者:
山本 敏弘,(発電技検),浦山 良一,(東北大),古川 敬,(発電技検),高木 敏行,(東北大)
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The purpose of this study is to establish a computational procedure to support the optimization of an EMAT configuration. In this study, computer simulations were performed to obtain the propagation behavior of ultrasonic waves generated by an EMAT and the signals received with an EMAT. The simulation results were compared with the corresponding experimental results to validate the simulation method. The simulation results reasonably matched the corresponding experimental results....
英字タイトル:
FEM simulation with consideration of electromagnetic interaction for transmitting and receiving ultrasonic waves with an EMAT