Zaporizhzhya nuclear plant initiates reactor shutdown following water leak
Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) has started to transfer reactor unit 4 from hot shutdown to cold shutdown today following detection of a water leak at one of its four steam generators located in the containment of unit 4, Director General Rafael Mariano Grossi said, reads a press release of IAEA.
The ZNPP will place unit 4 into cold shutdown to determine the precise cause of the water leak that has been detected and to conduct maintenance to repair the affected steam generator. There was no radiological release to the environment. At the same time, over the next three days, ZNPP 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. During the week, the IAEA experts were informed that ZNPP has been conducting specific maintenance on parts of unit 6 safety systems and ZNPP has stated that this work and all tests of the safety systems were successfully completed before commencing the transition of unit 6 to hot shutdown. The IAEA team on the site will closely monitor the operations for the transition between the shutdown states of Units 4 and 6.
The other units at ZNPP remain in cold shutdown.
ZNPP has been experiencing major off-site power problems since the conflict began in early 2022, exacerbating the nuclear safety and security risks facing the site currently located on the frontline.