第7回
ステンレスにおける水素同位体透過挙動の解明
著者:
押尾 純也,Junya OSUO,倉田 理江,Rie KURATA,小林 真,Makoto KOBAYASHI,鈴木 優斗,Masato SUZUKI,王 万景,Wanjing WANG,大矢 恭久,Yasuhisa OYA,奥野 健二,Kenji OKUNO
発刊日:
公開日:
キーワードタグ:
Stainless steel is used in various nuclear installations as a major structural material. Tritium is produced by several nuclear reactions in these facilities. It is considered that the hydrogen isotope included tritium permeated for stainless steel through the interaction such as dissolution, diffusion and recombination, and is released on the atmosphere. Therefore, it is important to clarify permeation behavior of tritium in stainless steel from the viewpoint for improvement of the social acceptability o...
英字タイトル:
Study on permeation behavior of hydrogen isotope in stainless steel
論文
先進的なナトリウム冷却高速炉の炉心出口部における サーマルストライピング現象に関する水流動試験 (1)制御棒周辺部の温度変動緩和対策の提案
著者:
小林 順,Jun KOBAYASHI,相澤 康介,Kosuke AIZAWA,江連 俊樹,Toshiki EZURE,栗原 成計,Akikazu KURIHARA,田中 正暁,Masaaki TANAKA
発刊日:
公開日:
キーワードタグ:
A design study of an advanced sodium-cooled fast reactor (Advanced-SFR) has been conducted in Japan Atomic Energy Agency (JAEA). Hot sodium from the fuel assembly can mix with cold sodium from the control rod (CR) channel and the blanket assemblies at the bottom plate of the Upper Internal Structure (UIS). Temperature fluctuation due to mixing of the fluids at different temperature between the core outlet and cold channel may cause high cycle thermal fatigue on the structure around the bottom of UIS. A wate...
英字タイトル:
Water Experiments on Thermal Striping Phenomena at the Core Outlet of an Advanced Sodium-cooled Fast Reactor? (1) Proposal of Countermeasures to Mitigate Temperature Fluctuations around Control Rods?
論文
先進的なナトリウム冷却高速炉の炉心出口部における サーマルストライピング現象に関する水流動試験 (2)径方向ブランケット燃料集合体周辺部の 温度変動緩和対策の提案
著者:
小林 順,Jun KOBAYASHI,相澤 康介,Kosuke AIZAWA,江連 俊樹,Toshiki EZURE,栗原 成計,Akikazu KURIHARA,田中 正暁,Masaaki TANAKA
発刊日:
公開日:
キーワードタグ:
Focusing on the thermal striping phenomena that occurs at a bottom of the internal structure of an advanced sodium-cooled fast reactor (Advanced-SFR) that has been designed by the Japan Atomic Energy Agency, a water experiment using a 1/3 scale 60 degree sector model simulating the upper plenum of the Advanced-SFR has been conducted to examine countermeasures for the significant temperature fluctuation generated around the bottom of Upper Internal Structure (UIS). In the previous paper, we reported the effe...
英字タイトル:
Water Experiments on Thermal Striping Phenomena at the Core Outlet of?an Advanced Sodium-cooled Fast Reactor? (2) Proposal of Countermeasures to Mitigate Temperature Fluctuations?around Radial Blanket Fuel Assemblies?
第3回
圧延した FeCu モデル合金の析出挙動と磁気特性の関係
著者:
鎌田 康寛,Yasuhiro KAMADA,高橋 正氣,Seiki TAKAHASHI,越後谷 淳一,Junichi ECHIGOYA,荒 克之,Katsuyuki ARA,菊池 弘昭,Hiroaki KIKUCHI,小林 悟,Satoru KOBAYASHI,登澤 雄介,Yusuke TOZAWA
発刊日:
公開日:
キーワードタグ:
This study demonstrates the possibility of applying magnetic methods to pressure vessel surveillanc e at nuclear power plants. Magnetic hesteresis-minor-loop measurement and TEM observation were pref ormed on thermally aged Fe-1.0wt%Cu model alloys. Minor loop parameters decreased with increasing a ging time. The mechanism is discussed in terms of Cu precipitation behaviors of cold-rolled alloys....
英字タイトル:
Relation between Precipitation Behaviors and Magnetic Properties in Cold-rolled FeCu Model Alloys
第11回
電磁誘導法による肉厚測定技術の開発(その1) -保温材付き配管への適応-
著者:
高倉 一真,Kazuma TAKAKURA,小林 雅弘,Masahiro KOBAYASHI,出井 義純,Gijun IDEI,貝塚 眞生,Masao KAIZUKA
発刊日:
公開日:
キーワードタグ:
Electro-Magnetic Induction Testing method is widely used in the industries. However, due to the deterioration of sensitivity by increase of Lift-Off (distance between sensor and test piece) and the limitation of penetration of magnetic flux into thick magnetic and conductive material such as carbon steel, its application is limited to comparative testing between sound and defective samples. The newly developed system enables the measurement of wall thickness and the detection of inner-surface defects ...
英字タイトル:
Development of Measuring Techniques of Thick Wall Samples by Electro-Magnetic Induction (Part 1) - An Application for Pipes covered by Thermal Insulator -
第11回
電磁誘導法による肉厚測定技術の開発(その2) -加熱ジャケット付き容器への適用-
著者:
小泉 英明,Hideaki KOIZUMI,稲熊 正彦,Masahiko INAKUMA,加納 洋一,Yoichi KANO,菊池 英樹,Hideki KIKUCHI,小林 雅弘,Masahiro KOBAYASHI,高倉 一真,Kazuma TAKAKURA,出井 義純,Gijun IDEI
発刊日:
公開日:
キーワードタグ:
Eddy Current Testing (ECT) is widely used in the industries. However, ECT normally uses certain high frequency range, therefore its application is limited to detect surface- or near surface defects. Strength of the electro-magnetic flux decreases exponentially in penetrating into the samples, and its rate is a function of conductivity, permeability and thickness of the samples and the frequency in use. Therefore, conventional ECT is difficult to detect inner surface defects or measure the thickness of...
英字タイトル:
Development of Measuring Techniques of Thick Wall Samples by Electro-Magnetic Induction (Part 2) - An Application for Vessels with Heating Jacket -