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第10回
テンパービード溶接におけるビード形状・温度分布の 予測シミュレーションモデル
著者:
村上 寛企,Hiroki MURAKAMI,岡野 成威,Sigetaka OKANO,亀山 雅司,Masashi KAMEYAMA,瀬良 健彦,Takehiko SERA,望月 正人,Masahito MOCHIZUKI
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In this study, a predictive simulation model coupling weld bead formation and thermal conduction was developed for construction of the method of predicting or evaluating the temperature distribution during temper bead welding. Welding parameters used in the analysis were estimated from experimental welding conditions based on the thermal conduction theory and numerical simulations of previous works. The simulation results were compared with the experimental results under the same welding conditions to ...
英字タイトル:
Predictive Simulation Model of Bead Shape and Temperature Distribution during Temper Bead Welding
第10回
デジタル画像相関法に基づく多結晶金属の 多重すべりを考慮した微視的変形挙動推定手法の提案
著者:
小田 和生,Kazuo ODA,三上 欣希,Yoshiki MIKAMI,望月 正人,Masahito MOCHIZUKI
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Even when a macroscopically uniform deformation is applied to a polycrystalline material, the generated microscopic strain distribution will not be uniform due to factors such as the non-uniform grain orientation distribution and grain boundaries. Despite the strong need to accurately measure strain distributions, suitable method is limited. This study proposes an experimental method for estimating strain distributions in polycrystalline materials considering multiple slip systems. Firstly, a polycryst...
英字タイトル:
Estimation of Microscopic Deformation Behavior by Digital Image Correlation Method Considering Multiple Slip Systems in Polycrystalline Materials
第10回
パルス渦電流試験を用いた鋼材の減肉検出
著者:
小坂 大吾,Daigo KOSAKA,坂根 尚武,Shobu SAKANE,橋本 光男,Mitsuo HASHIMOTO,長沼 潤一郎,Junichiro NAGANUMA
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This paper aims at a detecting corrosion on the back surface of a ick steel plate. Our proposed technique is characterized by using pulsed eddy current testing with DC magnetization. The thick steel plate is magnetized by DC Magnetizer. Therefore the magnetization g erates the magnetic flux in the plate. The permeability of the plat e changes with the corrosion. Changes in the permeability of the pl ate are detected by pulsed eddy current testing. The corrosion on e back surface of the plate was detecte...
英字タイトル:
Corrosion Detection on Steel by using Pulsed Eddy Current Testing
第10回
フィルタードベントシステムに関する研究
著者:
藤井 康弘,Yasuhiro FUJII,奈良林 直,Tadashi NARABAYASHI,佐藤 修彰,Nobuaki SATO,辻 雅司,Masashi TSUJI,千葉 豪,Go CHIBA,川本 洋右,Yosuke KAWAMOTO
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This paper describes how to write a manuscript of the 18th PES Proceedings. In the Fukushima Daiichi Nuclear Power Plant accident, a great deal of radioactive material was released to surrounding environment. After the accident, the Filtered Containment Venting System (FCVS) that can remove radioactive material from steam in containment vessel has attracted a great deal of attentions. However, there is few knowledge of filtered vent in Japan because almost filtered vent were developed in Europe after ...
英字タイトル:
Research related to Filtered Venting System
第10回
フリースタンディングラックの耐震設計手法に関する検討
著者:
谷口 勝彦,Katsuhiko TANIGUCHI,奥野 大作,Daisaku OKUNO,岩崎 晃久,Akihisa IWASAKI,猫本 善続,Yoshitsugu NEKOMOTO,松岡 寿浩,Toshihiro MATSUOKA
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For high earthquake resistance and ease of installation, free standing racks which are not anchored to the pool floor or walls has been adopted in many countries. Under the earthquake, the response of the free standing rack is highly nonlinear and involves a complex combination of motions (sliding, rocking, twisting, and turning) and impacts between the fuel assemblies and the fuel cell walls, rack-to-rack, and the pit floor and rack pedestals. We carried out seismic experiments on the full-scale rack ...
英字タイトル:
Seismic Design Method of Free Standing Rack
第10回
プラントシステムコードによる 「もんじゅ」異常時の動特性解析
著者:
望月 弘保,Hiroyasu MOCHIZUKI
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The objectives of the present study are to analyze plant transients caused by small abnormalities and to find plant parameters by which operators can recognize these small abnormalities. In order to evaluate the plant transient during an abnormal situation in the water system using the plant system code NETFLOW++, the turbine and feedwater systems should be analyzed with good precision. The code is validated using the measured data at “Monju”. Several abnormalities in the water system are candidates o...
英字タイトル:
Abnormality Transient Analysis of Monju using a Plant System Code
第10回
ポンプの各異常状態時における効率変化傾向および状態判定法
著者:
陳山 鵬,Ho JINYAMA,李 可,Ke LI,薛 紅涛,Hongtao XUE,山村 尚広,Naohiro YAMAMURA,水津 明日香,Asuka SUIZU
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Abstract : In this research, the performance and efficiency of a centrifugal pump under operation are diagnosed with high precision by measurement of electric current, voltage, flow rate, and pressure. Moreover, mechanical faults (misalignment etc.) and the faults in fluid (cavitation etc.) were diagnosed precisely with the vibration signals, and the reason of efficiency fall was clarified theoretically and experimentally. In this report, we proposed the condition diagnosis method for pump equipment by...
英字タイトル:
Condition Diagnosis Method and of Efficiency Trend in Fault State for a Centrifugal Pump
第10回
ミューオン透過を用いた高線量場での非破壊検査
著者:
泉 幹雄,Mikio IZUMI,竹村 真,Makoto TAKEMURA,杉田 宰,Tsukasa SUGITA,郡司 智,Satoshi GUNJI,熊埜御堂　宏徳,Hironori KUMANOMIDO,吉岡 研一,Kenichi YOSHIOKA,伴 雄一郎,Yuichiro BAN
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Muon tomography has recently been put to practical use for nondestructive testing of shipping container. But it can’t be used in a high dose environment(～1mSv/h) without shielding. So, we are developing high dose tolerant muon track measurement system using spark chamber technology. In this paper, the result of simulation is described. We found that it is necessary to use 10cm-square scintillation counters and its pulse width is in 300ns. We confirmed this design is achievable to use in high dose rate(...
英字タイトル:
High dose tolerant nondestructive testing using muon tomography
第10回
レーザピーニングによる低圧タービン動翼の疲労強度改善
著者:
千田 格,Itaru CHIDA,佐野 雄二,Yuji SANO,廣田 圭一,Keiichi HIROTA,犬飼 隆夫,Takao INUKAI,角谷 利恵,Rie SUMIYA,佐々木 英寿,Hidekazu SASAKI,野村 光,Hiroshi NOMURA
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Some damages were found at the forks of low pressure turbine blades caused by random vibration and steam-flashback vibration. In this study, for the aim of fatigue property improvement, laser peening technology for 12Cr stainless steel was developed and material properties were examined. Laser peening is a process to induce compressive residual stress to the material surface. Fatigue specimens which simulate the stress concentration zone of forks were fabricated and laser peening was applied to the su...
英字タイトル:
Development of laser peening technology for low pressure turbine blades to improve fatigue properties
第10回
三次元フェーズドアレイ超音波探傷による 応力腐食割れの可視化とサイジング精度の検討
著者:
北澤 聡,So KITAZAWA,河野 尚幸,Naoyuki KONO,工藤 健,Takeshi KUDO,井坂 克己,Katsumi ISAKA
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The three-dimensional phased-array (3D-PA) ultrasonic technique has been applied to a stress corrosion cracking (SCC) in base metal, and its results for sizing have been quantitatively evaluated. The 3D-PA allows operators to scan objects volumetrically and to display results as 3D images facilitating evaluation processes considerably. The scanning pattern used is called the moving rotational sectorial-scan (MRS-scan) and it is composed of many sectors of different azimuth angles as moving the probe li...
英字タイトル:
Visualization and Quantitative Research of Stress Corrosion Cracking Using the Three-Dimensional Phased Array Ultrasonic Technique
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