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第6回
高温水中におけるオーステナイト系合金の高応力下酸化-2 表面硬化層の影響評価
著者:
竹田 陽一,Yoichi TAKEDA,佐藤 崇之,Takayuki SATO,庄子 哲雄,Tetsuo SHOJI,大地 昭生,Akio OHJI
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Surface oxide behavior on alloys in high temperature plays an important role in the stress corrosion clacking (SCC) mechanism according to plausibl e existing SCC models. In this investigation, roughness analysis of oxide/alloy interface on stainless steels after exposure in oxygenated high pur ity water under high stress conditions. A special emphasis was placed on how the oxidation penetration localized and went through the surface harde ned layer. It was pronounced that SCC initiation on hardened layer ...
英字タイトル:
Oxidation Behavior of Austenitic Alloys under High Stress Condition in High Temperature Water-Effect of Surface Hardened Layer
第6回
高温水中におけるオーステナイト系合金の高応力下酸化ｰ1・Cr 含有量の影響評価
著者:
佐藤 崇之,Takayuki SATO,竹田 陽一,Yoichi TAKEDA,庄子 哲雄,Tetsuo SHOJI,大地 昭生,Akio OHJI
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In this study, nickel-chromium binary alloys are used on the oxidation test in high temperature water to reveal the effect of chromium conten t on the oxidation behavior under high stress condition. It was shown that the oxidation behavior was affected by chromium content, stress co ndition and surface hardened layer. The feature which induced the localization of oxidation behavior was found on the oxide film of low chro mium alloys. It was thought that the presence of threshold conditions about chromium c...
英字タイトル:
The Oxidation Behavior of Austenitic Alloys under High Stress Condition in High Temperature Water-Effect of Chromium Content
第6回
高経年化機器の新検査・モニタリング技術のニーズ・シーズデータベース
著者:
高橋 浩之,Hiroyuki TAKAHASHI,青木 孝行,Takayuki AOKI,楠 丈弘,Takehiro KUSUNOKI,大谷津 裕,Yutaka OYATSU
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This paper reports an outline of the prototype database system which can provide with information on needs and seeds for new inspection and mon itoring technology, which is applicable to the actual nuclear power plan ts for understanding ageing degradation conditions of plant components....
英字タイトル:
Needs and seeds database of new inspection and monitoring technology for ageing equipment
第6回
（1）機械学会におけるオンラインメンテナンスの検討状況
著者:
班目 春樹,Haruki MADARAME
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In order to make the inspection of nuclear facilities more effective, mutual understanding and respect between the regulatory body and the licensees, and a frank, open and yet formal relationship shall be fostered. Thus the Research Committee on Optimization of Nuclear Safety Regulation was established at JSME in 2005, and the consensus of the committee served the recent regulatory system improvement, where insp ection during plant operation was attached importance. Regulatory issues related to on-line mai...
英字タイトル:
Technical Study on On-line maintenance in JSME Committee
第6回
（2）運転中保全（オンラインメンテナンス）の検討状況
著者:
山本 哲也,Tetsuya YAMAMOTO
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The Nuclear and Industrial Safety Agency (N I SA) has begun the review of online main tenance in nuclear power plants in its advisory committee. The experts in the committ ee study the necessary actions in the regulation and safe and secure measure to impl ement the online maintenance. This paper explains the current progress of the review....
英字タイトル:
The review of online maintenance in nuclear power plants
第6回
（3）海外におけるオンラインメンテナンスの現状
著者:
水町 渉,Wataru MIZUMACHI,小林 正英,Masahide KOBAYASHI
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In many countries, online maintenance has been already introduced. Especially in US, online maintenance has been introduced to many nuclear plants which has (N+1) redundant safety systems as Japanese plants. There experience will contribute us to discuss how to introduce online maintenance in Japan. In IAEA's nuclear safety criteria and guidance, it is recognized that the outage of one safety system for maintenance is usual operation. This is normal sense in the world. In US, the ris k when online maintena...
英字タイトル:
Status of Online Maintenance in the world
第6回
（4）オンラインメンテナンス時の許容待機除外について
著者:
小林 正英,Masahide KOBAYASHI
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The purpose of this report is clarification of the handling of online maintenance in important system for nuclear safety of nuclear power plant in Japan, and discusses future tasks of online maintenance in Japan. Now, online maintenance is limited few cases in Japan. But, the needs and importance of online maintenance will be increase near future. It is necessary to evaluate safety at the online maintenance, and if necessary PSA results were used. It will be safety to do online maintenance within AOT , bu...
英字タイトル:
Discussion on allowed outage time at Online Maintenance in Japan
第6回
（5）オンラインメンテナンスの安全性評価
著者:
宮田 浩一,Koichi MIYATA,今井 英隆,Hidetaka IMAI
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This study shows how Japanese utilities are expanding “On-line Maintenance” activity, and how safety of “Single system On- line Maintenance” is maintained. The basis of Single system On-line Maintenance is the design basis accident analysis. On the other hand, the basis of “Multiple system On-line Maintenance“ will be discussed in the future when risk informed regu lation is introduced. Considering this situation, Japanese utilities will start from “Single system On-line Maintenance”....
英字タイトル:
An Evaluiation of On-Line Maintenance Safety
第6回
（6）オンラインメンテナンスの手法と評価
著者:
千種 直樹,Naoki CHIGUSA
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Abstract: For planning and enforcing the On Line Maintenance (OLM) in the near future, we should take care of keep reasonable balanc e between the degree of risk increase and the task volume equalization. In this paper, the current status of studying for the OLM int roducing on Japanese utilities is described. The planning approach of OLM is examined on the assumption that planned OLM can be carr ied out. The practical methods and evaluations for the OLM are described, and the trial evaluation for this met...
英字タイトル:
A Study for the Practical Methods and Evaluations for the On-Line Maintenance
第6回
（１）新検査制度の概要とその運用状況
著者:
山本 哲也,Tetsuya YAMAMOTO
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The new nuclear inspection system established by the Nuclear and Industrial Safety Agency (NISA) came into force in January 2009. The NISA focused on the maintenan ce program to set up the new system. The new inspection system require the report of the maintenance plan to the NISA, safety verification of the plan by the NISA, collection of deterioration data of facilities, reflection of the data on self check, and online monitor of concerned equipment. Utilities have reported approxima tely 30 of their mai...
英字タイトル:
The outline of the new nuclear inspection system and its current exercise
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