To prevent a core meltdown like the one in Fukushima in Zaporizhia, diesel generators had to supply the power to cool the reactor cores and fuel elements at times over the weekend. How long do these generators work? How safe are they?The emergency diesel generator sets can remain in operation as long as diesel is available and maintenance is undisturbed. This is the tricky point. Everything depends on what the Russians want and what further attempts at damage they make. It's about what will they have for further escalation.

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