But the I.A.E.A. has been unable to access key parts of the reactors at Zaporizhzhia, as the occupying Russian force and surrounding shelling make it too dangerous for inspectors. That raises the prospect that if damage is done to the facility, it may be difficult, at best, to assess the danger, he added.
In his nightly address to Ukrainians, President Volodymyr Zelensky on Friday highlighted what he called the “brazen crime” of the Russian military using the nuclear power plant as cover.
“The occupiers created another extremely risky situation for everyone in Europe,” Mr. Zelensky said, citing the explosions earlier in the day at the plant. “This is the largest nuclear power plant on our continent. And any shelling of this facility is an open, brazen crime, an act of terror.”
David E. Sanger contributed reporting from Weston, Vt.