“I think that the damage of the dam doesn’t impact the plant immediately, because they are being cooled by the safety systems located at the plant, which are spray systems,” he said. “The plant has a cooling lake, about two or three kilometres in diameter.”
The Energoatom statement said the cooling lake was filled and was at 16.6 metres (54.5ft), “which is sufficient for the power plant’s needs”.
Mariana Budjeryn, a Ukrainian nuclear scientist, said: “The fact that there’s an artificial pond next to the ZNPP [Zaporizhzhia nuclear power plant] where water can be maintained above the reservoir level, and the fact that the reactors are in cold shutdown, offers some reassurance and increased time to respond if ZNPP starts getting affected.”
But Budjeryn, who is a senior research associate on the project on managing the atom at Harvard University, added: “The bigger problem – who is going to do it? ZNPP is already down-staffed to bare bones.”
Oleksiy said that over time water would evaporate from the cooling lake and if it could not be filled from the vast reservoir created upstream of the Nova Kakhovka dam, the turbines and the power plant could not be operated.
In his statement, Grossi said that the cooling pond should last “for some months” but it was imperative it was not damaged in fighting. The water is used to cool not just the reactor cores, but also the spent fuel and the diesel generators used for safety systems.
“Absence of cooling water in the essential cooling water systems for an extended period of time would cause fuel melt and inoperability of the emergency diesel generators,” he warned.
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