“…This behavior is strongly influenced by the chemical water regime and the material selection. The usual problems with the steam generators leading to degradation are associated with vibration, fretting, fatigue, stress-corrosion, cracking, pitting, denting, deposition of corrosion products at the tube sheet etc., Green (1988), Solomon et al (1985). So depending on the design, material selection and water chemistry the good steam generators already showed 30 years operation.…”