After putting 2×800 MW units manufactured in Russia and equiped in Guohua Suizhou Power Generation Co Ltd into service

leakages have frequently occurred on said units.It is believed that the causes leading to leakage are mainly due to problems existing in design

production

and installation process of the condenser tubes

as well as strong corrosiveness of the sea water

and scouring corrosion of solid-liquid two-phase flow

etc..Through adopting measures

such as electrolysing sea water to prepare sodium hypochlorite for killing marine organisms

brushing anti-corrosion paint or adding protective sleeves for protecting the tube mouthes

applying saw dusts into entrance of the circulating water pump in operation for plugging the leakage

shutting down half condenser in operation for inspecting leakages

and filling water during shutdow for inspecting leakages

as well as washing and cleaning the water chamber and copper tubes in the condenser after shutdown

and carring out ventilation for drying etc.

the leakage situation has been substantially improved.