水中レーザクラッド溶接工法に関するガイドライン
Guideline on Underwater Laser Beam Clad Welding for preventive maintenance
著者:
末園 暢一 Nobuichi SUEZONO 元良 裕一 Yuuichi MOTORA 坂下 彰浩 Akihiro SAKASHITA 岡田 亮兵 Ryohei OKADA
発刊日:
公開日:
JANTI GuidelinemitigationSCCULBW
概要
JANTI Guideline on underwater laser beam clad welding for preventive maintenance against SCC was published. This paper introduces the summary of that guideline. Underwater laser beam welding has good advantages for the repair and mitigation work for operating nuclear plants' reactor internals. Since it does not need to drain the water from RPV, preparation before the work can be very concise, and dose rate that workers suffer can be controlled in very low level. And heat input during the welding procedure is almost 1/10 of conventional welding such as TIG welding. It is also better feature for the welding on the irradiated structures. Gui deline on seal welding by ULBW was already published more than 2 years ago. For the next step, it is expected to discuss and publish the next Guideline on ULBW for the application on structural parts in near future.
