原子力発電所における新溶接補修技術の 迅速な適用プロセスの検討
Study on implementing newly developed repair welding technique within a limited time frame for nuclear power plant
著者:
平野 伸朗 Shinro HIRANO 瀬良 健彦 Takehiko SERA 千種 直樹 Naoki CHIGUSA 于 麗娜 Lina YU 望月 正人 Masahito MOCHIZUKI 西本 和俊 Kazutoshi NISHIMOTO
発刊日:
公開日:
Alloy 600RNPtechnical standardstemper-beadwelding simulation
概要
Abstract For the last couple of years, issue of defects in Alloy 600 weld lowered the capacity factor of nuclear power plants. To apply newly developed repair technique, like temper-bead welding that has not been prescribed in technical standards, it is necessary to evaluate its technical applicability to the requirement. In the previous cases, this process has been completed by issuance of no action letter for specific area and condition, utilizing implementation process, such as confirm testing by JAPEIC and RNP. This paper clarifies the requirement prescribed in technical standards and extracts issues which need to be resolved before implementation that can not be ensured by the welding qualification and inspection on site. State of welding simulation technique can be employed to resolve these issues. It was concluded that estimation of hardness, microstructure, and fracture toughness by simulation may have potential to reduce time to complete the implementation process.
