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論文
ウォータージェットピーニング（WJP）技術のＢＷＲ炉内構造物への適用
著者:
佐川 渉,Wararu SAGAWA,吉久保 富士夫,Fujio YOSHIKUBO,守中 廉,Ren MORINAKA,菅野 明弘,Akihiro KANNO,波東 久光,Hisamitsu HATO,齋藤 昇,Noboru SAITOU
発刊日:
公開日:
キーワードタグ:
WJP (Water Jet Peening) technology generates the compressive residual stresses on the surface of the material by the extremely high impulse pressure caused by the collapse of cavitation bubbles when high-pressure water jet is discharged in the water. WJP is the promising technology for countermeasure of SCC initiated on the core structures of BWR with some advantages; Collection of foreign materials is not necessary, and WJP is applicable to the complicated structure in narrow space and improves relat...
英字タイトル:
Application of Water Jet Peening (WJP) technology to BWR Core Support Structures
論文
ステンレス鋼のIASCC感受性と磁気特性の相関性に関する研究
著者:
根本 義之,Yoshiyuki NEMOTO,欅田　理,Satoshi KEYAKIDA,内一 哲哉,Tetsuya UCHIMOTO,塚田 隆,Takashi TSUKADA
発刊日:
公開日:
キーワードタグ:
Authors previously reported leakage magnetic flux density measured by flux gate (FG) sensor seems to depend on irradiation assisted stress corrosion cracking (IASCC) susceptibility of neutron irradiated austenitic stainless steels. This study aimed to evaluate possibility to develop diagnostic method to detect symptom of IASCC by more practical methods such as Eddy current method and AC magnetization method. Magnetic properties of neutron irradiated specimens and mockup specimens were studied and dep...
英字タイトル:
A Study of Correlativity between IASCC Susceptibility and Magnetic Property of Stainless Steel
論文
核燃料再処理用機器の予防保全に向けたステンレス鋼の沸騰硝酸中での腐食の統計的検討
著者:
上野 文義,Fumiyoshi UENO,山本 正弘,Masahiro YAMAMOTO,加藤 千明,Chiaki KATO
発刊日:
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キーワードタグ:
Corrosion of ultra-low carbon type 304 stainless steel in boiling nitric acid solution was analyzed by statistical approach. A large scale mock-up of an evaporator was introduced to perform corrosion test of heat exchanger tubes, and change in loss of wall thickness and intergranular penetration depths of the tubes during test duration was measured and analyzed statistically applying normal distribution and Gumbel distribution. As the results, it was considered that tube wall was corroded uniformly an...
英字タイトル:
Statistical Approach on Corrosion of Stainless Steel in Boiling Nitric Acid for Prevention Maintenance of Nuclear Fuel Reprocessing Plant
論文
波形観測にもとづくその場計測と機械設備異常診断への応用
著者:
宇佐美 照夫,Teruo USAMI,小島 史男,Fumio KOJIMA
発刊日:
公開日:
キーワードタグ:
This study discusses a practical application of diagnostic signature analysis to testing machine plant. The specific　features　of　acoustic signal from rotating machines are caught by diagnostic signal analysis.　As a result, the automated inspection and diagnosis of the rotating states of motors have become possible. For the diagnostic technique composed of signal averaging and normalization method is used. The statistical classifications using a characteristic function and an estimated function have p...
英字タイトル:
Practical Application on Diagnostic Analysis to Testing Machines By Observing Noise Signals in Plants
論文
溶接継手・部材の疲労強度の簡便推定法に関する研究
著者:
林 健治,Kenji HAYASHI
発刊日:
公開日:
キーワードタグ:
In terms of maintenance, repair and reinforcement of existing welded steel structures, it is required to evaluate the fatigue strength of welded joints and structural members with weld defects. Fatigue design guidelines specify that the fatigue strength of welded joints should be confirmed by fatigue tests reflecting the actual situation. However, it is difficult to carry out such fatigue tests in most instances. This paper proposes that the simple method to evaluate the fatigue strength of welded ...
英字タイトル:
Study of Numerical Evaluation Method for Fatigue Strength of Welded Joints and Members
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