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 

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 

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 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 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 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks to the media as he visits the Chornobyl Nuclear Power Plant in Chornobyl, Ukraine April 26, 2022. REUTERS/Oleksandr Ratushniak 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks to the media as he visits the Chornobyl Nuclear Power Plant in Chornobyl, Ukraine April 26, 2022. REUTERS/Oleksandr Ratushniak 

International Atomic Energy Agency (IAEA) employees walk at a compound of the Chornobyl Nuclear Power Plant in Chornobyl, Ukraine April 26, 2022. REUTERS/Oleksandr Ratushniak 

International Atomic Energy Agency (IAEA) employees are seen at compound of the Chornobyl Nuclear Power Plant in Chornobyl, Ukraine April 26, 2022. REUTERS/Oleksandr Ratushniak 

An International Atomic Energy Agency (IAEA) employee walks at a compound of the Chornobyl Nuclear Power Plant in Chornobyl, Ukraine April 26, 2022. REUTERS/Oleksandr Ratushniak 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks during a joint news conference with Ukraine's President Volodymyr Zelenskiy (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks during a joint news conference with Ukraine's President Volodymyr Zelenskiy (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks during a joint news conference with Ukraine's President Volodymyr Zelenskiy (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy speaks during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy and International Atomic Energy Agency (IAEA) Director General Rafael Grossi attend a joint news conference, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi leaves a joint news conference with Ukraine's President Volodymyr Zelenskiy, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy awards an employee of the Chornobyl Nuclear Power Plant who was under Russian captivity at the plant, during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy awards an employee of the Chornobyl Nuclear Power Plant who was under Russian captivity at the plant, during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy and International Atomic Energy Agency (IAEA) Director General Rafael Grossi attend a joint news conference, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy awards employees of the Chornobyl Nuclear Power Plant who were under Russian captivity at the plant, during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy speaks during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS//Valentyn Ogirenko 

International Atomic Energy Agency (IAEA) Director General Rafael Grossi speaks during a joint news conference with Ukraine's President Volodymyr Zelenskiy (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy speaks during a joint news conference with International Atomic Energy Agency (IAEA) Director General Rafael Grossi (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy and International Atomic Energy Agency (IAEA) Director General Rafael Grossi attend a joint news conference, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

Ukraine's President Volodymyr Zelenskiy and International Atomic Energy Agency (IAEA) Director General Rafael Grossi attend a joint news conference, as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 26, 2022. REUTERS/Valentyn Ogirenko 

A man reads a book at a train station, amid Russia's invasion of Ukraine, in Odesa, Ukraine, April 12, 2022. The book is titled: "Robert Oppenheimer and the atomic bomb". REUTERS/Igor Tkachenko 

The hands of Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, are pictured during his interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato 

cerumi Tanaka, a Nagasaki atomic bombing survivor and co-Chairperson of Nihon Hidankyo, a Japan-wide organisation of atomic and hydrogen bomb sufferers, shows a Nagasaki city map with circles indicating the distance from the hypocenter during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato 

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, attends an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato 

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, poses for a photograph during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato 

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, reacts during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato