A Review Japanese Pipe Wall Thinning management Based on JSME Rules and Recent RD Studies Performed.pdf

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A Review Japanese Pipe Wall Thinning management Based on JSME Rules and Recent RD Studies Performed.pdf

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AReviewJapanesePipeWallThinningmanagementBasedonJSMERulesandRecentR

14 E-Journal of Advanced Maintenance Vol.2 (2010/2011) 14-24 Japan Society of Maintenology ISSN – 1883 – 9894/10/11 ? 2010/2011 – JSM and the authors. All rights reserved. A Review: Japanese Pipe Wall Thinning Management Based on JSME Rules and Recent RD Studies Performed to Enhance the Rules Isoharu NISHIGUCHI 1,*, Fumio INADA2, Makoto TAKAHASHI3, Bunji OGAWA4, Tetsuhiko INAGAKI5, Taku OHIRA6, Kotaro IWAHARA7, Katsuhiko YAMAKAMI8 1 Kanagawa Institute of Technology. 1030, Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan 2 Central Research Institute of Electric Power Industry (CRIEPI), 2-11-1, Iwado-kita, Komae-shi, Tokyo 201-8511, Japan 3 Tokyo Electric Power Co., 1-1-3, Uchisaiwai-cho, Chiyoda-ku, Tokyo 100-0011, Japan 4 Kansai Electric Power Co., 8 Yokota, 13 Go-shi, Mihama-cho, Mikata-gun, Fukui 919-1141, Japan 5 Chubu Electric Power Co., 1, Higashi-shinmachi, Higashi-ku, Nagoya 461-8680, Japan 6 Japan Atomic Power Co., 1-1, Kanda Mitoshiro-cho, Chiyoda-ku, Tokyo 100-0053, Japan 7 Hitachi-GE Nuclear Energy Co. 3-1-1, Hitachi-shi, Ibaraki, 317-0073, Japan 8 Mitsubishi Heavy Industries Ltd., 2-1-1, Nihama, Arai-cho, Takasago-shi, Hyogo 652-8585, Japan (Received; April 1st, 2010) Abstract. In summer 2004, a large-bore carbon steel pipe of a PWR secondary system ruptured at the Mihama Unit 3, Japan, with some fatalities. The Main Committee on Power Generation Facility Codes (MC-PGFC) of the Japan Society of Mechanical Engineers (JSME) established technical rules for PWRs and BWRs, which were requested by the nuclear power industry as well as the regulatory bodies. In Japan, different wall-thinning management rules have been established for PWR plants and BWR plants because of the difference in their management, such as water chemistry and inspection points. For example, in BWR plants, the wall-thinning rate is relatively small at the condensation system and the feed water system after oxygen injection point. The rules for ea