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BWR In-Core Monitor Housing Replacement Under Dry Condition of Reactor Pressure Vessel

[+] Author Affiliations
Tatsuo Ishida, Shoji Yamamoto

Japan Atomic Power Company, Tokai, Ibaraki, Japan

Fujitoshi Eguchi

Japan Atomic Power Company, Tokyo, Japan

Motomasa Fuse, Kouichi Kurosawa, Sadato Shimizu, Minoru Masuda

Hitachi, Ltd., Hitachi, Ibaraki, Japan

Shinya Fujii, Junji Tanaka

General Electric International, Inc., Tokyo, Japan

Bryce A. Jacobson

General Electric Company, San Jose, CA

Paper No. ICONE10-22679, pp. 407-412; 6 pages
  • 10th International Conference on Nuclear Engineering
  • 10th International Conference on Nuclear Engineering, Volume 1
  • Arlington, Virginia, USA, April 14–18, 2002
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-3595-2 | eISBN: 0-7918-3589-8
  • Copyright © 2002 by ASME


A new method of In-Core Monitor Housing replacement has been successfully applied to Tokai Unit 2 (BWR with 1100 MWe) in April of 2001. It was designed to replace a housing under dry condition of reactor pressure vessel (RPV): this enabled the elimination of water filled-up and drained processes during the replacement procedure resulting in the reduction of implementation schedule. To realize the dry condition, the radiation shields were placed in the RPV and the hollow guide pipe (GP) was adopted to transfer the apparatuses from the top to the bottom work area.

Copyright © 2002 by ASME



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