A WEAR LIFE EVALUATION METHOD FOR PLUGGED TUBE IN STEAM GENERATOR

摘要

PURPOSE: An abrasion lifetime evaluation method of a steam generator plugged heat transfer tube is provided to easily perform an evaluation process by considering an exponential value of an exponential function for thickness change properties according to the abrasion of a heat transfer tube surface. CONSTITUTION: A curve fitting process is performed based on a thickness measurement value before plugging a heat transfer tube. A first curve is generated(S100). An evaluation result is acquired by evaluating validity of the curve fitting process(S200). A second curve is generated by correcting the first curve(S300). A tube plugged correction coefficient is calculated(S400). An abrasion lifetime estimation curve is computed for the plugged heat transfer tube. The abrasion lifetime is evaluated(S500).