Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks to the media as he visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks to the media as he visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks to the media as he visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chernobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi attends a IAEA flag-raising ceremony as he visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA) Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

A UN vehicle is parked, on the day Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

A UN vehicle is parked, on the day Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi visits the Chornobyl Nuclear Power Plant, amid Russia's attack on Ukraine in Chornobyl, Ukraine January 18, 2023. REUTERS/Gleb Garanich 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks next to Ukrainian Energy Minister German Galushchenko (not pictured) during a meeting at the South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks next to Ukrainian Energy Minister German Galushchenko (not pictured) during a meeting at the South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks next to Ukrainian Energy Minister German Galushchenko (not pictured) during a meeting at the South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi speaks next to Ukrainian Energy Minister German Galushchenko (not pictured) during a meeting at the South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Ukrainian Energy Minister German Galushchenko looks on during his meeting with Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Ukrainian Energy Minister German Galushchenko looks on during his meeting with Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi and Ukrainian Energy Minister German Galushchenko talk during a meeting at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi and Ukrainian Energy Minister German Galushchenko talk during a meeting at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, and Ukrainian Energy Minister German Galushchenko talk during a meeting at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near the city of Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi, and Ukrainian Energy Minister German Galushchenko talk during a meeting at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near the city of Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

Director General of the International Atomic Energy Agency (IAEA), Rafael Mariano Grossi and Ukrainian Energy Minister German Galushchenko talk during a meeting at South Ukraine Nuclear Power Plant, amid Russia's invasion of Ukraine, near the city of Yuzhnoukrainsk, Ukraine January 16, 2023. REUTERS/Nacho Doce 

International Atomic Energy Agency (IAEA) Director General Rafael Mariano Grossi speaks with journalists after he and a part of the IAEA mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

A motorcade transporting a part of the International Atomic Energy Agency (IAEA) mission coming back from a Zaporizhzhia nuclear power plant crosses a Ukrainian checkpoint, amid Russia's invasion of Ukraine, in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

A motorcade transporting a part of the International Atomic Energy Agency (IAEA) mission coming back from a Zaporizhzhia nuclear power plant crosses a Ukrainian checkpoint, amid Russia's invasion of Ukraine, in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

Ukrainian serviceman with a dog checks a motorcade transporting a part of the International Atomic Energy Agency (IAEA) mission coming back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with Ukrainian Minister of Energy German Galushchenko and Petro Kotin, head of Ukraine's state nuclear power company Energoatom, after Grossi and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with Ukrainian Minister of Energy German Galushchenko after Grossi and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with journalists after he and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with journalists after he and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with journalists after he and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

IAEA Director General Rafael Mariano Grossi speaks with journalists after he and a part of the International Atomic Energy Agency (IAEA) mission came back from a Zaporizhzhia nuclear power plant, amid Russia's invasion of Ukraine, at a Ukrainian checkpoint in Zaporizhzhia region, Ukraine September 1, 2022. REUTERS/Anna Voitenko 

Members of the International Atomic Energy Agency (IAEA) expert mission, led by IAEA Director-General Rafael Grossi, visit the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Director-General of the International Atomic Energy Agency (IAEA) Rafael Grossi meets with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Members of the International Atomic Energy Agency (IAEA) expert mission, led by IAEA Director-General Rafael Grossi, meet with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A Russian all-terrain armoured vehicle is parked outside the Zaporizhzhia Nuclear Power Plant during the visit of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Members of the International Atomic Energy Agency (IAEA) expert mission visit the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Director-General of the International Atomic Energy Agency (IAEA) Rafael Grossi meets with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Director-General of the International Atomic Energy Agency (IAEA) Rafael Grossi meets with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Director-General of the International Atomic Energy Agency (IAEA) Rafael Grossi meets with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Russian military vehicles escort a motorcade transporting the International Atomic Energy Agency (IAEA) expert mission while leaving the Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Director-General of the International Atomic Energy Agency (IAEA) Rafael Grossi meets with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Members of the International Atomic Energy Agency (IAEA) expert mission, led by IAEA Director-General Rafael Grossi, meet with journalists at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A view shows a logo on the facade of the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Service members stand guard outside the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict near Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Russian military vehicles escort a motorcade transporting the International Atomic Energy Agency (IAEA) expert mission while approaching the Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Service members stand guard at a checkpoint near the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

Service members walk near the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A service member stands guard near the Russian-controlled Zaporizhzhia Nuclear Power Plant following the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A service member levels a weapon at a checkpoint near the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A service member levels a weapon at a checkpoint near the Russian-controlled Zaporizhzhia Nuclear Power Plant before the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A motorcade transporting the International Atomic Energy Agency (IAEA) expert mission arrives at the Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside the Russian-controlled city of Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A car transporting members of the International Atomic Energy Agency (IAEA) expert mission drives past a checkpoint upon the arrival at the Russian-controlled Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko 

A motorcade transporting the International Atomic Energy Agency (IAEA) expert mission, escorted by the Russian military, arrives at the Zaporizhzhia Nuclear Power Plant in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A service member stands guard outside the Russian-controlled Zaporizhzhia Nuclear Power Plant following the arrival of the International Atomic Energy Agency (IAEA) expert mission in the course of Ukraine-Russia conflict outside Enerhodar in the Zaporizhzhia region, Ukraine, September 1, 2022. REUTERS/Alexander Ermochenko