A Study on the Evaluation of the Fracture Toughness for the Narrow Gap Welding Part of Nuclear Piping

Abstract

The fracture toughness for the LBB analysis of piping is generally determined by the J-integral according to ASTM E1820. However, since this evaluates a base metal, the fracture toughness for narrow gap welding can be differently than the real value. This study evaluated the plastic  factor of the narrow gap welding part of a nuclear piping with SA508 Cl.1a and SA312 TP316. Also, it performed the fracture toughness test for the narrow gap welding part and applied the new plastic  factor equation by Huh, et al. and then compared the results with those according with the ASTM standard. § 이 논문은