Radioactive Coolant Leaks from Europe's Largest Nuclear Reactor, No Safety Threat

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Approximately 100 cubic meters of "radioactive coolant" leaked from Finland's Olkiluoto 3 nuclear reactor during maintenance on Friday, according to operator TVO. The leak occurred while filling the reactor pool and was contained within closed rooms, with no risk posed to personnel or the environment.

TVO stated that the incident, caused by a human error involving a hatch that was not properly closed, was considered to have low significance for radiation safety. Their assessment concluded that necessary safety measures were effectively implemented in response to the leak. The annual outage for maintenance, which began prior to the incident, is not expected to be affected and is scheduled to last until May.

Olkiluoto 3, constructed by the French-led Areva-Siemens consortium, is recognized as the largest nuclear reactor in Europe, generating over 10 percent of Finland's electricity. Despite past challenges with construction delays and cost overruns, the reactor continues to be a critical component of Finland's energy infrastructure.

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