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Guideline of Weld Overlay Repair Method for Primary Piping of Japanese Boiling Water Reactors

[+] Author Affiliations
Haruo Fujimori, Eisaku Hayashi

Hitachi, Ltd., Hitachi, Ibaraki, Japan

Yuichi Motora

Toshiba Corporation, Yokohama, Japan

Hitoshi Ohata

Japan Atomic Power Company, Tokyo, Japan

Hideo Sakurai

Tokyo Electric Power Company, Fukushima, Japan

Paper No. PVP2006-ICPVT-11-93690, pp. 421-427; 7 pages
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 1: Codes and Standards
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4752-7 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME


A private guideline of a weld overlay (WOL) repair method for SCC cracked Boiling Water Rector (BWR) primary piping was provided by Thermal and Nuclear Power Engineering Society of Japan. In the WOL method, the overlaid structure of SCC resistant 308L weld metal substitutes for cracked existing piping weldments as pressure boundary. The guideline prescribes the applicability, welding conditions and essential variables, weld overlay structural design, evaluation of welding effects to the piping system, in-process control, post-process examination, and procedures of pre-service and in-service inspection.

Copyright © 2006 by ASME



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