原子炉容器上蓋貫通部のPWSCC 対策のための気中封止溶接工法
英字タイトル:
Seal Welding of PWSCC at J-weld of Reactor Vessel Head Penetration Nozzle
著者:
沖村 浩司 Koji OKIMURA 宮口 仁一 Jinichi MIYAGUCHI
発刊日:
公開日:
Alloy 690GTA weldingJ-weld of penetration nozzlePWSCCReactor vessel headSeal welding
Seal Welding of PWSCC at J-weld of Reactor Vessel Head Penetration Nozzle
著者:
沖村 浩司 Koji OKIMURA 宮口 仁一 Jinichi MIYAGUCHI
発刊日:
公開日:
カテゴリ: 第6回
キーワードタグ:Alloy 690GTA weldingJ-weld of penetration nozzlePWSCCReactor vessel headSeal welding
概要
The penetration nozzles of reactor vessel head, which are made of alloy 600, have sensitivity to Stress Corrosi Cracking in PWR primar y water environment (PWSCC). To preparing the countermeasure in case of cracks oh during the inspection activity, a dedicated seal wel ding method has been developed, where alloy 690 is used fd metal to isolate the cracking from the environment. This method was applie d to an actual plant effectively, wh leakage at the penetration due to wall-through crack was observed at the domestic plant in 2004.
