On the basis of practical situation in one power plant

a supporting system for condition based maintenance of the feed-water pumps in said power plant has been developed. Taking the reliability as the centre

and based on failure mode and effect analysis (FMEA)

an optimal policy decision for maintenance has been given out after situation evaluation and risk estimation of the feed-water pump by using the characteristic spatial vector method and the fuzzy mathematical method . Practical operation shows that the said system has friendly interface

being convenient to operate

and having correct policy decision

laying a solid foundation for realizing condition based maintenance of the equipments in whole plant.