Behaviour of a PWR vessel dissimilar metal weld during a steam line break transient

摘要

This paper presents the results of a Finite Element analysis conducted on the behaviour of a 15 mm deep fully circumferential crack on the outer surface of a bi-metallic weld of a 900 Mwe Pressurized Water Reactor vessel, during a Steam Line Break transient. The typical weld considered connects the stainless-steel hot leg with the ferritic vessel.