189件が見つかりました。

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第16回
質量分析法を用いた再処理工場の定期バイオアッセイ分析の改善
著者:
沼沢 怜奈,小比類巻 康二,一戸 佳奈,工藤 訓,（ジェイテック）,大山 一寿,氣田 信一,田中 義也,（日本原燃）
発刊日:
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On evaluation of internal exposure in the radiation workers involved in maintenance and operation, calculation from work environment measurement, extracorporeal measurement methods and bioassay analysis method are adopted in Rokkasho Reprocessing Plant from its features. In addition, we proceed to improve efficiency of analysis work by implementing pretreatment of samples promptly and safety with mass analysis method as which ICP-MS, inductively coupled plasma mass spectrometers is used. We report overview ...
英字タイトル:
Improvement of periodical bioassay analysis by mass spectrometry in Rokkasho Reprocessing Plant
第16回
超微小硬度試験での変形組織進展と損傷組織の相互作用による照射硬化量への影響
著者:
馬渕 貴魁彰,梶原 祐介,福元 謙一,（福井大）
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An irradiation hardening behavior in a SUS316 steel was investigated from the ultra-micro hardness test after hydrogen ion irradiation as parameters of irradiation dose and indentation depth systematically. Based on the crystal orientation of the sample surface specified using EBSD, comparative evaluation of ultra-micro hardness in the same crystal orientation relationship was performed. Cross-sectional TEM observation of ion-irradiated microstructure under the indentation after deformation was performed to...
英字タイトル:
Effect for irradiation hardening due to interaction between deformation process and microstructural evolution during nano-indenter examination
第16回
超音波可視化技術および数値解析を用いた焦点型電磁超音波探触子の評価
著者:
手塚 晃世,（東北大）,山本 敏弘,（発電技検),孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
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Electromagnetic acoustic transducer (EMAT) is suited to monitoring because of its non-contacting nature. However, a standard EMAT tends to give overestimating results because the estimated thickness is associated with the average of varying thickness over an area under the coil of EMAT. To solve this problem, Point-Focusing EMAT (PF EMAT), which concentrates ultrasonic waves at a certain point, was applied to thickness gauging. This study evaluates the focusing property of PF EMAT and its applicability to l...
英字タイトル:
Evaluation of Point Focusing EMAT using ultrasonic wave visualization system and finite element analysis
第16回
超音波探傷シミュレーション技術を活用した訓練用データの試作
著者:
古川 敬,上山 芳教,山本 敏弘,直本 保,（発電技検）
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Ultrasonic testing (UT) is one of the most appropriate non-destructive testing because of capabilities for flaw detection and flaw height sizing of flaw. Interpretation and analysis of UT data are not easy, to identify and classify relevant indications are sometimes very difficult. UT personnel shall be qualified to an appropriate level in accordance with a code and standard. In addition, personnel should keep and improve their skills. In this paper, an FEM UT simulation was applied to make UT training data...
英字タイトル:
Prototype of UT Training Simulator using Large Scale FEM Simulation
第16回
超音波探傷試験員の力量向上が配管破損リスクの低減に及ぼす影響の評価
著者:
小嶋 正義,高橋 秀治,木倉 宏成,（東工大）
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Ultrasonic testing (UT) is a part of maintenance program for essential equipment of nuclear power plants in in-service inspection (ISI). Analyses of probabilistic fracture mechanics (PFM) for welds of class 1 piping have been studied to evaluate piping failure risks. Probability of detection (POD) is one of the important input conditions in the PFM analysis. The POD is closely related to a capability of UT examiners; therefore it is anticipated that the capability improvement of UT examiners is related to t...
英字タイトル:
Effect of Ultrasonic Testing Examiners’ Capability Improvements on Reduction of Piping Failure Risk
第16回
送信条件を考慮した過渡解析によるLamb波伝播モードの振幅評価
著者:
喜多村 健司,杉浦 壽彦,（慶應義塾大)
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In nondestructive testing (NDT), ultrasonic testing (UT) can inspect internal defects of the material with a simple device. General UT is performed by point measurement. On the other hand, UT using guided waves that propagate long distance in pipe and plate structures is expected as an efficient inspection. However, there are multiple dispersive propagating modes in the same frequency band, and they are very complicated. For highly accurate inspection, it is important to determine the amplitude of each guid...
英字タイトル:
Amplitude evaluation of Lamb wave propagating mode by transient analysis considering transmission condition
第16回
連続肉厚測定が可能な超音波探触子の肉厚測定精度妥当性評価
著者:
酒井 裕介,吉田 正志,松下 義昭,栗原 恵,（東京電力HD）
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In power plant, most of the pipe is examined for confirming the thickness of the pipe wall during the period of inspection in the suspension of the plant. As pipe thinning phenomenon can progress mostly in the running of the plant, the measuring for the thickness value in running time is needed for confirmation of health and safety evaluation precisely. In this study, “Flex Dry UTM” was developed as a new type of UT system for making it possible to monitor pipe wall thickness continuously. Its measuring per...
英字タイトル:
The evaluation of validity of accuracy in measuring thickness by ultrasonic probe for continuous measurement of pipe thickess
第16回
運転・保守訓練用ハイブリッドコンパクトシミュレータ（J-HySIM）の開発と活用実績
著者:
向川 大敬,中山 大幹,佐々木 崇文,高橋 盛治,佐藤 賢太,畑中 明,（ジェイテック)
発刊日:
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J-tech developed the compact-sized training system by itself, which simulated industrial plants with key components such as operation control console, electric control panel, instrumentation, and mechanical equipment. The requirement and expectation of the member of the operation and maintenance departments were reflected, and this enables them to implement not only operation training at normal/abnormal situation, but also various kinds of maintenance work such as isolation, disassembling, reassembling, tes...
英字タイトル:
Achievement of development and operation of “J-tech hybrid compact simulator (J-HySIM) for operation and maintenance training
第16回
配管減肉のモニタリングと予測に基づく配管システムのリスク管理　(1)固液混相流条件下における壁面近傍の物質移動係数評価
著者:
中河 良太,阿部 博志,渡邉 豊,（東北大）
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In the Fukushima Daiichi Nuclear Power Station, it is possible that fuel debris dust, scraps of reactor structural materials, etc. will be mixed into the cooling water during future fuel debris retrieval process. In that case, the thinning mechanism of the cooling system piping may be different from that under liquid single-phase flow. In this study, the final goal is to predict the thinning behavior based on the carbon steel pipe thinning mechanism under solid-liquid mixed phase flow. Then, mass transfer c...
英字タイトル:
Piping System, Risk Management based on Wall Thinning Monitoring and Prediction ( ) Mass transfer coefficient evaluation near the wall surface under solid-liquid multiphase flow conditions
第16回
配管減肉のモニタリングと予測に基づく配管システムのリスク管理　(2)固液混相流エルボ内流れの可視化実験
著者:
江原 真司,（東北大）
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In order to clarify the solid particle behavior in a piping flow, especially to that in the vicinity of channel wall, a water-circulation loop was fabricated for the evaluation of solid particle -liquid two-phase flow. Firstly, the inflow condition upstream into an elbow was evaluated by a flow visualization experiment adopting PIV method and almost fully-developed turbulent velocity profiles have been realized by inserting perforated plates in the flow straightener tank installed upstream of the elbow. Hou...
英字タイトル:
Piping System, Risk Management based on Wall Thinning Monitoring and Prediction (2) Visualization Experiment of Solid-Liquid Multiphase Flow in a Elbow
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