Development and evaluation of welding repair for threaded hole of Reactor Pressure Vessel flange. (June 2021)

• Record Type: Journal Article
• Authors: Huang, Tengfei; Jin, Liang; Chen, Tao; Qiu, Zhensheng
• Is Part Of: International journal of pressure vessels and piping. Volume 191(2021)
• Publication Date: 2021-06
• Subjects: Development -- Evaluation -- Welding repair -- Threaded hole -- Fatigue properties -- Welding residual stresses; Pressure vessels -- Periodicals; Pipe -- Periodicals; Récipients sous pression -- Périodiques; Tuyaux -- Périodiques; Pipe; Pressure vessels; Periodicals; 681.76041
• DOI: 10.1016/j.ijpvp.2021.104341
• Languages: English
• ISSNs: 0308-0161

Abstract

Abstract: Temper bead welding repair method was proposed to repair the damage of stud holes with threads in the flanges of the Reactor Pressure Vessel. The particular welding procedure was developed to avoid cold crack. And the filler material matched with the base metal was developed to achieve the basic engineering mechanical characteristics. Furthermore, fatigue properties and welding residual stresses were evaluated. Based on the design curve defined in the design code, a kind of evaluation method was established, and used for assessing the fatigue strength of the weld metal. The welding residual stresses induced by temper bead welding were estimated from engineering view, based on analyses of multiple perspectives. In addition of the mechanical performance, a series of tests were designed and conducted to evaluate the application performance. Highlights: The temper bead welding procedure to restore the metal of the RPV threads is developed and evaluated from engineering view.