In this photo provided by the Ukrainian Presidential Press Office, Ukrainian President Volodymyr Zelenskyy, left, shakes hands with Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (Ukrainian Presidential Press Office via AP)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, right, and Ukrainian Energy Minister Herman Halushchenko shake hands in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Derek Gatopoulos)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, speaks to the media in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Efrem Lukatsky)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, speaks to the media in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Efrem Lukatsky)

Rescue workers extinguish a fire of a burning electrical substation hit by a Russian bombing in Dnipropetrovsk region, Ukraine, Monday, Sept. 2, 2024. (AP Photo/Evgeniy Maloletka)

A Ukrainian firefighter talks on the radio while he works to extinguish the fire on the site of an electrical substation that was hit by Russian strike in Dnipropetrovsk region, Ukraine, Monday, Sept. 2, 2024. (AP Photo/Alex Babenko)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, speaks to the media in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Efrem Lukatsky)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, speaks to the media in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Efrem Lukatsky)

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, right, and Ukrainian Energy Minister Herman Halushchenko greet each other in Kyiv, Ukraine, Tuesday, Sept. 3, 2024. (AP Photo/Derek Gatopoulos)