Nuclear, O&M, Reactors

S. Korea nuclear unit shut down for flooding to restart soon

South Korea’s Nuclear Safety and Security Commission approved the restart of a nuclear power unit and keep five others offline.

The 650-MW Kori 2 nuclear unit was shut down in August when heavy rainfall overflowed a building designed to collect seawater and cool steam from a turbine. The building is not a core part of operations, but plant operator Korea Hydro & Nuclear Power Co. Ltd. decided to shut down the reactor for safety reasons.

Regulators said in Reuters that pump operations and seals were confirmed to prevent future flooding. Five other reactors are offline either due to scheduled maintenance or awaiting approval for a lifecycle extension, the article said. The units down for maintenance – Kori 4, Hanbit 2, Wolsong 3 and Hanul 3 – are expected back online between September and November. There is no deadline for when the Wolsong 1 reactor will receive its extension.

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