Abstract:The health evaluation of condenser in the nuclear power plant has important significance for the operation and maintenance of the equipment.A variable weight fuzzy health evaluation method is proposed.Firstly,the relevant evaluation parameter set is obtained through the data mechanism.Using the evaluation parameter as the failure criterion,the status of each evaluation parameter is firstly scored by using the membership function,and the fuzzy relation matrix of the parameter set is calculated by using the state score;then,the entropy method is used to determine the correlation parameter set.Based on the constant weights of the evaluation parameters,a variable weight formula based on the equalization function is introduced.Then the variable weight matrix and the fuzzy relation matrix are used for fuzzy comprehensive evaluation.And finally the comprehensive health degree is obtained.Using the method proposed to evaluate the health of the condenser,the results show that when the equipment is running into an abnormal state,it can realize early detection.This method improves the safety and reliability of condenser operation in nuclear power plants.