Detectability of Intergranular Cracks in Austenitic Pipe Welds of German Boiling Water Reactors with Different Methods of Nondestructive Testing

摘要

In the austenitic reactor water cleanup systems and in the bearing pressure water systems of 4 German BWRs from material X 10 CrNiTi 18 9 there were detected since 1993 more than 100 welds with intergranular oracks. The cracks were detected during displacement of parts of the above mentioned piping systems, when the welds could be inspected by NDT-methods also from the inner surface.