Unit 4 at the Zaporizhzhia nuclear power station in Ukraine is being transferred from hot shutdown to cold shutdown following detection of a water leak at one of its four steam generators in the containment, International Atomic Energy Agency director-general Rafael Mariano Grossi said on Thursday (10 August).
Unit 4 will be placed in cold shutdown to determine the precise cause of the water leak and to carry out maintenance to repair the affected steam generator.
At the same time, over the next three days, staff will move Unit 6 to hot shutdown to continue steam production on site.
Unit 6 has been in cold shutdown since 21 April, to enable inspection and maintenance of the safety systems.