き裂を有する原子炉内機器への ウォータージェットピーニングの適用
APPLICATION OF WATER JET PEENING ON BWR REACTORINTERNALS WITH CRACKED SURFACES
著者:
長谷川 国広 Kunihiro HASEGAWA 波東 久光 Hisamitsu HATOU 齋藤 昇 Noboru SAITOU 菅野 明弘 Akihiro KANNO 吉久保 富士夫 Fujio YOSHIKUBO 守中 廉 Ren MORINAKA
発刊日:
公開日:
Crack PropagationExisting CracksStress Corrosion CrackingWater Jet Peening
概要
稲田 崇 Takashi INADA Water Jet Peening (WJP) has been widely applied to Japanese nuclear power plants since 1999, as an approved mechanical mitigation technique against stress corrosion cracking (SCC) on materials use d for nuclear reactors.Existing laboratory experience and analysis indicated that WJP had no negative impact on pre-existing cracks, such as crack propagation during its application, although ther e was no field experience of applying WJP on cracked surfaces. Recently, The Japan Atomic Power Company (JAPC) and Hitachi-GE Nuclear Energy, Ltd. (HGNE) have successfully applied WJP on cracked s urfaces, where the cracks left as is with the requirement that they should be inspected for sizing by UT periodically to monitor the each crack propagation according to the regulator's direction.
