Titanium tube blocking margin and defect management for condenser in nuclear power plant

Abstract

In recent years, titanium tubes of condensers have been damaged in many nuclear power plants in China. Heat transfer tube damage will cause condenser leakage, resulting in shutdown, power reduction or delayed startup events. It has a great influence on the normal and stable operation of the unit. The design margin of condenser heat transfer tube, the data of blocking pipe in previous overhaul and the tracking of defective pipe of some domestic units were investigated. The defects of condenser heat transfer tube and the influence of pipe blocking on equipment performance were analyzed. In order to ensure the safe operation of condenser, some suggestions on the management of condenser defect tube were put forward.