Blackouts forced the shutdown of reactors at Ukraine's Pivdennoukrainsk nuclear power plant in the south and the Rivne and Khmelnitskyi plants in the west, all in government-held territory, the state-run nuclear energy firm Energoatom said.
"Currently, they (power units) work in project mode, without generation into the domestic energy system," Energoatom said.
Explosions reverberated throughout Kyiv on Wednesday afternoon as Russian missiles bore down and Ukrainian air defence rockets were fired in efforts to intercept them.
Most thermal and hydro-electric power plants were forced to shut down as well, Ukraine's energy ministry said earlier.
[1/15] Rescuers work at a site of a residential building destroyed by a Russian missile attack, as Russia's attack on Ukraine continues, in the town of Vyshhorod, near Kyiv, Ukraine, November 23, 2022.