144件が見つかりました。

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第5回
PSAを援用した非常用ディーゼル発電機　機関ターニング操作廃止に関する検討について
著者:
矢吹 健太郎,Kentaro YABUKI
発刊日:
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キーワードタグ:
This study evaluates quantitatively eme rgency diesel generator turning operati on before start using PSA. We decide t o quit turning operation by this study....
英字タイトル:
Study about Abrogation of Emergency Diesel Generator Turning Operation using PSA
第5回
PWMを用いたセンサネットワークによるモニタリングシステムの検討
著者:
藤原 健,Takeshi FUJIWARA,高橋 浩之,Hiroyuki TAKAHASHI
発刊日:
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This study proposes an innovative method for the monitoring the nuclear power plant. In this field, false detection of the trouble, both “false negative” and “false positive” will become a serious problem. In the other hand, since its complexity of nuclear power plant, simplicity of monitoring system is strongly required. Here, we propose a new simple and reliable health monitoring sensor n etwork system. Our pulse width modulation technique realizes a self-maintenance function in single signal line (token...
英字タイトル:
Designing Reliable Sensor Network for Nuclear Power Plant
第5回
PWR蒸気発生器入口管台における割れ事例と点検規定について
著者:
堂﨑 浩二,Koji DOZAKI,中間 昌平,Shohei NAKAMA
発刊日:
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キーワードタグ:
Similar cracking events have been occurring on steam generator nozzles of Japanese PWR plants since the first case was found at Mihama-2 in September 2007. These cracks were found by eddy current test (ECT) prior to performing a kind of shot peening as a preventive measure on dissimilar metal weld (DMW), a nd were considered as primary water stress corrosion cracking (PWSCC) based on cause investigation. It was pointed out that surface finishing such as grinding or machining played an important role on cra...
英字タイトル:
Cracking Events on PWR Steam Generator Nozzles and Its Relationship to Inspection Rules
第5回
RBM評価を用いた原子力空調設備の保全計画方法の確立
著者:
森 優介,Yusuke MORI,池原 徳彦,Norihiko IKEHARA,国安 英一,Hidekazu KUNIYASU,足立 真也,Shinya ADACHI
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This study was aimed at sophisticating maintenance of static machineries in nuclear power plant HVAC by using RBM (Risk Based Ma intenance). In the present report the author intends to validate the quantitative processing discussed earlier and to apply it to long-term maintenance plan. As a result of verifying RBM, 80% of apparatus was in agreement with judgment of expert engineers, an d the prospect of RBM utilization was acquired. The long-term maintenance plan procedure using the result of RBM was estab...
英字タイトル:
Development of Planning Maintenance Method of Static Equipments Using Risk Based Maintenance
第5回
Simulations and Measurements of Sodium Effect on the ECT Signal for SG Tubes of FBR
著者:
Ovidiu MIHALACHE,Toshihiko YAMAGUCHI,Masashi UEDA,

発刊日:
公開日:
キーワードタグ:
Japan Atomic Energy Agency, FBR Research Center Shinya MIYAHARA, Japan Atomic Energy Agency, FBR Research Center The present p aper estimates using numerical simulations the eddy current effect of the sodium layer located outside of steam generator tube s of fast breeder reactors. Variations in the outside tube defect signal are computed by finite element simulations. The numer ical model of sodium layer is based on the experimental determination of the sodium layer using a test tank sodium experiment....
英字タイトル:
Simulations and Measurements of Sodium Effecton the ECT Signal for SG Tubes of FBR
第5回
Sonic-IR法による平板SCCの検出性評価
著者:
勝又 陵介,Ryosuke KATSUMATA,松本 善博,Yoshihiro MATSUMOTO,原田 豊,Yutaka HARADA,阪上 隆英,Takahide SAKAGAMI,久保 司郎,Shiro KUBO
発刊日:
公開日:
キーワードタグ:
Sonic-IR which is based on the thermographic detection of the temperature rise due to fric tional heating at the crack faces under ultrasonic excitation, has an advantage in the det ection of closed cracks. In this study, feasibility of the Sonic-IR technique for the dete ction of stress corrosion cracking is experimentally investigated by using plate specimens....
英字タイトル:
Evaluation of Detectability of Stress Corrosion Cracking by Sonic-IR Technique
第5回
SUS304鋼平滑材の疲労過程における塑性誘起マルテンサイト変態量の発展
著者:
中曽根 祐司,Yuji NAKASONE
発刊日:
公開日:
キーワードタグ:
The present study has investigated plasticity-induced martensitic phase transformation in fatigue of unnotched SUS304 plates. Martensitic phase transformation occurred in uunotched SUS304 plate specimens fatigued at room temperature in air. Volume fraction Va of a'martensite in the uunotched potion of fatigued s pecimens was measured by ferrite scope. The relations between the maximum value of Vas Va’max, and the number of load cycles N were represented by reverse sigmoidal curves for all the applied stres...
英字タイトル:
Evolution of Volume Fraction of Plasticity-Induced Martensitic Phase during Fatigue Process of SUS304 Stainless Steel at Room Temperature in Air
第5回
UT分析システムの適用によるUT評価手法の高度化
著者:
井原 亮一,Ryoichi IHARA,井 裕一,Yuichi I,西田 純一朗,Jun-ichiro NISHIDA,川田 かよ子,Kayoko KAWATA,川瀬 直人,Naoto KAWASE
発刊日:
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In domestic nuclear power plants, ultrasonic testing is performed as an in-service inspection for piping accor ding to JSME code. Using automated UT equipments and UT analysis system, confirmation of repeatability for UT data, automated extraction and detailed evaluation are performed. Furthermore, automated reporting function ma kes reduction of hours of work. In this report, the outline and advantage of UT analysis system are described....
英字タイトル:
Upgrading of UT Evaluation Technique Applying UT Analysis System
第5回
「原子炉構造材の監視試験法」JEAC4201改定の概要
著者:
小山 幸司,Koji KOYAMA,廣田 貴俊,Takatoshi HIROTA
発刊日:
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キーワードタグ:
Japan Electric Association (JEA) Code, JEAC4201, “Method of Surveillance Tests for Structural Materials of Nuclear Reactors” s pecifies the method of surveillance test to investigate and evaluate the mechanical properties change (mainly embrittlement) o f reactor pressure vessel for LWR plants. The draft revised code was approved by the Nuclear Standards Committee of JEA last D ecember and was issued as JEAC4201-2007. This presentation introduces the summary of this code and the point of the revision....
英字タイトル:
Revision Summary of JEAC4201 “Method of Surveillance Testsfor Structural Materials of Nuclear Reactors”
第5回
よく分かる我が国のエネルギー戦略(環境問題とエネルギー供給確保)
著者:
近藤 駿介
発刊日:
公開日:
1.はじめに気候変動に関する政府間パネル(IPCC)は、昨年発行した第4次評価報告書において、20世紀 半ば以降の全球平均気温の上昇は人為起源の大気中温室効果ガス濃度の増加によって生じた 可能性が非常に高いとした上で、平均気温の上昇に伴い、水資源、生態系、食料、沿岸、人 の健康に様々な影響が現れることを予測し、これらの影響を削減し、遅らせ、回避するため に達成を目指すべき温室効果ガスの大気中濃度の安定化レベルを複数示した。例えば、全球 平均の気温上昇を産業革命以前比で2-2.4°Cに抑えるにはこの濃度を4......
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