Assessment of the Kinetics of Crack Propagation in the Header-Steam Generator Connector Welded Joint NO. 111 by Plasticity Resource

The results of simulation of crack kinetics of the PGV-1000 header-steam generator connector weldment of NPP WWER-1000 reactor units calculated using plasticity resource under normal operational conditions and hydrotesting are presented. It is shown that the proposed approach to calculation of the crack propagation kinetics makes it possible to obtain a conservative estimate of the structural elements’ lifetime, including with account for corrosion effect.