In Fujian Kemen Power Plant the #2 small steam turbine processes filter water of the small steam turbine lubricating oil tank, with the amount of filtered water exceeding 500ml. The oil contains a large amount of water, causing the emulsification of the small steam turbine lubricating oil, thereby to cause poor lubrication of the small steam turbine and high bearing temperature, and possibly to cause accidents of bush burning or shutdown.

BKC experts, after on-site inspection and analysis, found that the small steam turbine oil system had a large amount of water inlet. After studying the structure drawing, they determined that the water leakage position was the spiral seal of the water pump. They hence provided an improvement plan for the feed pump shaft seal, renovating pipelines of the sealed water system and eradicating leakage. The water pump has been running normally since then, having no water found in the oil.