Effect of Microbiology Ecology in Main Seal Water System of Power Plants

Microbiology influenced corrosion（MIC） happens in the main pump seal water system in nuclear power plants.For systematical study of the microbiology ecology in this system,many numbers of water samples were selected and their microbiology composition was tested.Results of microbial culture indicate that the total number of colonies from the source of water is the highest.MPN method test result indicates that the iron bacteria is the main type in this system,including Ralstonia,Acinetobacter,Pseudomonas and other bacteria that hard to cultured.Study reveals that the blocking phenomenon in the main pump seal water system is caused by many types of bacteria,and to reduce the effects of MIC,microbiology ecology must be destroyed.Regular monitoring and disinfection could decrease the risk of blocking.