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Cracks found in all four Olkiluoto Nuclear 3 feedwater pumps

WNN, 28 October 2022, Cracks of a few centimetres have been identified in all four of the feedwater pumps of the Olkiluoto 3 EPR in Finland. Operator Teollisuuden Voima Oyj (TVO) said it does not yet know the impact this will have on the schedule for the plant’s commissioning.

On 18 October, TVO announced that damage had been discovered in the internals of the feedwater pumps located in the plant’s turbine island during maintenance and inspection work.

The feedwater pumps are Olkiluoto 3’s largest pumps and are used to pump water from the feedwater tank into the steam generators. TVO said the cracks detected in the pumps have no impact on nuclear safety.

The company noted the structure of the feedwater pumps located in Olkiluoto 3’s turbine island is commonly used in power plants. However, the pumps at OL3 have been designed for the plant unit’s operations and are larger in size.

“The investigation is currently ongoing in several laboratories,” TVO has now said. “The root cause of the cracks found in the pump impellers is still unknown.”……………………………. more https://www.world-nuclear-news.org/Articles/Cracks-found-in-all-four-OL3-feedwater-pumps

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October 28, 2022 - Posted by | Finland, safety

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