Development of coupling fem-bem method for steam generator inspection

摘要

In a Pressurized Water Reactor (PWR) plant, the primary coolant circulates through thousands of tubes within the steam generator and transfers heat from the reactor core to the secondary coolant. These tubes, which are made of non-magnetic Inconel 600, are strengthened by support plates and a tube sheet of magnetic carbon steel. In order to make simulation of inspection and furthermore to reconstruct flaws from inspection data on them in the tube sheet and support plate portion, a conventional FEM-BEM method which is applicable to non-magnetic substance was newly established to deal with magnetic material problems.