METHOD FOR TUBE WEAR PREDICTION FOR STEAM GENERATOR BY USING UNIQUE VIBRATION FREQUENCIES AND VIBRATION MODE OF TUBE OBTAINED FROM HIGH SPEED SECONDARY SIDE FLOW ENERGY APPLIED FROM TURBINE CYCLE TO STEAM GENERATOR

摘要

PURPOSE: A method is provided to obtain a tube wear prediction by using the unique vibration frequencies and vibration mode of a tube obtained from a high speed secondary side flow energy applied from a turbine cycle to a steam generator. CONSTITUTION: A method comprises a step(S51) of modeling a tube by a finite element method(FEM); a step(S52) of calculating the unique vibration frequencies and vibration mode of the tube by using physical property information of the tube and physical property information of a secondary coolant for each of nodes of the FEM model; a step(S53,S54) of determining a wear coefficient of the tube by using the type of material, operating condition, and the fluid condition of the tube and information on the contact between the tube and a support, and calculating a contact force between the tube and the support; a step(S55) of calculating a quantity of wear of the tube by using the wear coefficient and the contact force; and a step(S56) of obtaining a tube wear prediction by using the calculated quantity of wear, wear coefficient, and the contact force.