The main constitutes of major components in the nuclear power plants are stainless steel and carbon steel. The corrosion behaviors of them in the plant environment of high temperature and high pressure are very different from that of other different environments. It is very difficult to obtain the plant component corrosion information, directly or on-line. However, the alternate effective method to evaluate component corrosion behavior is to use the field data of water quality monitoring. In this paper, the concentrations of insoluble and soluble metals in the plant cooling water are as the investigated objectives. The results show that crud type gamma-FeOOH is the major constitute in the balance of plant due to low temperature and all metals except soluble chromium deposit on the component surface in the inner of reactor due to high temperature.
Water chemistry Corrosion deposits Corrosion protection