Abstract: The damage of the titanium coating on the tube plate of condenser of nuclear power plant can lead very severe consequences, so it is necessary to pay high attention to the damage of the tube plate in condenser maintenance process and to formulate a detailed maintenance scheme. Aiming at the practical damage situation of titanium coating of tube plate of unit No.1 in Sanmen Nuclear Power Company Limited in condenser installation process, combining with the condenser operation and maintenance manual, the possible damage forms of the titanium coating of the tube plate were analyzed comprehensively, and the corresponding repairing scheme was formulated.

Key words: nuclear power plant, condenser, tube plate, titanium coating, welding, repair