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ASME 2012 Pressure Vessels and Piping Conference | 2012

Underwater Remote Microscopic Observation Technique for 3D Curved Surface of LWR Structures

Satoru Aoike; Koichi Kurosawa; Shinya Ohmori; Masaaki Tanaka

To survey core internals simply, new microscopic observation techniques were developed. These techniques were involved the use of “Gel electrode” and “underwater microscope”. A Gel electrode can etch the surface of core internals without a watertight reservoir that makes an etching environment. The underwater microscope can be used to observe surface figures of core internals directly. These techniques were applied to the cracks detected at the shroud support of Tokai II Power Station for investigation of the cause of crack initiation. It became clear that initiation points of the detected cracks were in a nickel-base weld metal.© 2012 ASME


Archive | 1993

Method of and apparatus for water-jet peening

Kunio Enomoto; Masahiro Otaka; Koichi Kurosawa; Hideyo Saito; Hiroshi Tsujimura; Yasumasa Tamai; Keiichi Uraki; Masahito Mochizuki


Journal of The Society of Materials Science, Japan | 1996

X-Ray Study on Deformation and Fracture of Solid. Effects of Water Jet Peening on Corrosion Resistance and Fatigue Strength of Type 304 Stainless Steel.

Katsuhiko Hirano; Kunio Enomoto; Eisaku Hayashi; Koichi Kurosawa


Archive | 2002

Inspection and preventive maintenance apparatus for structure within reactor pressure vessel, and inspection method

Katsuhiko Hirano; Koichi Kurosawa; Tadashi Morinaka; Hideaki Sakai; Nobuo Tada; 伸雄 多田; 廉 守中; 克彦 平野; 英明 酒井; 孝一 黒沢


Archive | 1999

Preventive maintenance apparatus for structural members in a nuclear pressure vessel

Koichi Kurosawa; Eisaku Hayashi; Sadato Shimizu; Minoru Ootaka; Fujio Yoshikubo; Ren Morinaka; Masayuki Nishino; Noboru Chiba; Kunio Enomoto; Kazunori Sato


Archive | 2011

Carry-out method of nuclear fuel material in nuclear power plant

Koichi Kurosawa; 孝一 黒澤; Masayoshi Sonobe; 正義 園部; Katsuhiko Hirano; 克彦 平野; Yasuhiro Usami; 靖浩 宇佐美; Hiroshi Muto; 寛 武藤; Tomohiko Motoki; 智彦 元木; Hiroshi Sasaki; 宏 佐々木; Fumio Totsuka; 文夫 戸塚; Toshinao Tsukiyama; 俊尚 月山; Kenichi Yasuda; 賢一 安田


Archive | 1993

METHOD AND STRUCTURE FOR PREVENTIVE MAINTAINING AN ELONGATED METAL HOLLOW MEMBER

Hideyo Saito; Koichi Kurosawa; Takayuki Numata; Shigeo Hattori; Takenori Shindo


Archive | 2005

Method and device for preventive maintainance of in-core instrumentation cylinder

Noboru Chiba; Yasuharu Hosono; Koichi Kurosawa; Tadashi Morinaka; Yasumi Nagura; Takahiro Ota; Toshizo Oya; Fujio Yoshikubo; 昇 千葉; 富士夫 吉久保; 保身 名倉; 寿三 大屋; 高裕 太田; 廉 守中; 康晴 細野; 孝一 黒澤


Archive | 1995

Residual stress improving method for members in reactor pressure vessel

Kunio Enomoto; Masahiro Otaka; Kazuo Amano; Koichi Kurosawa; Eisaku Hayashi; Ren Morinaka; Shigeo Hattori; Kasunori Sato


Archive | 1995

Method for removal and cutting of structure at inside of reactor pressure vessel

Isao Chiba; Hideyasu Furukawa; Sumihide Kihara; Koji Kikuchi; Koichi Kurosawa; Hiroshi Takada; 功男 千葉; 秀康 古川; 純秀 木原; 孝司 菊池; 浩志 高田; 孝一 黒沢

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