A geiger counter, measuring the radiation level of 0.275 Microsievert per hour, is seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Big black plastic bags containing radiated soil are seen inside the exclusion zone around the tsunami-crippled Fukushima Daiichi nuclear power plant in Futaba Town, Fukushima Prefecture, Japan, March 10, 2020. Picture taken March 10, 2020. REUTERS/Athit Perawongmetha

Big black plastic bags containing radiated soil, leaves and debris from the decontamination operation are collected next to a graveyard in Futaba Town, inside the exclusion zone around tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima Prefecture, Japan February 20, 2020. Picture taken February 20, 2020. REUTERS/Issei Kato

Workers are seen amid big black plastic bags containing radiated soil, leaves and debris from the decontamination operation at a temporary storage site in Futaba Town, inside the exclusion zone around tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima Prefecture, Japan February 20, 2020. Picture taken February 20, 2020. REUTERS/Issei Kato

A man carrying car radiators walks past burning tires set as a barricade during protests in Port-au-Prince, Haiti February 19, 2020. REUTERS/Andres Martinez Casares

The remains of a mattress, a bedside table, a ventilator and a radiator that used to be inside a guest tent are scattered on the scorched ground at the Kangaroo Valley Bush Retreat after a wildfire in Kangaroo Valley, New South Wales, Australia, January 23, 2020. REUTERS/Thomas Peter

Employees of Tokyo Electric Power Co's (TEPCO) wearing protective suits and masks are seen inside a radiation filtering Advanced Liquid Processing Systems, known as ALPS, at tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan January 15, 2020. Picture taken January 15, 2020. REUTERS/Aaron Sheldrick

A man walks past banners promoting safety about radiation from the Fukushima nuclear plant at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Banners promoting safety about radiation from the Fukushima nuclear plant are displayed at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Leaflets written in Korean (Bottom R) promoting safety in relation with radiation from the Fukushima nuclear plant are displayed at a press center of G20 Foreign Ministers meeting in Nagoya, Japan, November 22, 2019. REUTERS/Kim Kyung-Hoon/Pool

Protesters hold a placard saying "For our children" during a protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators, in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

Protesters hold placards saying "What if it was about your children?", "Is it the 12th or 21st century?", "We will not surrender our children" and "Children have rights too" during a protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

Protesters hold placards during protest against abuse in an institution for children with special needs after photographs emerged of children tied to beds and radiators in Sarajevo, Bosnia and Herzegovina November 21, 2019. REUTERS/Dado Ruvic

A bird sits on a radiation sign at the uranium ore dump near the town of Mailuu-Suu, Kyrgyzstan, October 23, 2019. Picture taken October 23, 2019. REUTERS/Pavel Mikheyev

A specialist measures radiation level during a civil protection functional exercise in case of nuclear disaster in Svencionys, Lithuania October 2, 2019. REUTERS/Ints Kalnins

A specialist measures radiation level during a civil protection functional exercise in case of nuclear disaster in Svencionys, Lithuania October 2, 2019. REUTERS/Ints Kalnins

Meteorologist Elke Ludewig stands on the radiation terrace with a Suntracker, Haenni Solar 111 and a burning glass at the Sonnblick Observatory at 3,106 meters above sea level in the Hohe Tauern mountain range near Rauris, Austria, November 23, 2018. REUTERS/Lisi Niesner

An instrument for measuring sunshine duration sits on the radiation terrace of the Sonnblick Observatory at 3,106 meters above sea level in the Hohe Tauern mountain range near Rauris, Austria, November 23, 2018. The old way to measure sunshine duration.REUTERS/Lisi Niesner

An employee of Ukraine's State Agency on Exclusion Zone Management demonstrates a device showing the radiation level near the New Safe Confinement (NSC) structure over the old sarcophagus covering the damaged fourth reactor at the Chernobyl Nuclear Power Plant, in Chernobyl, Ukraine July 5, 2019. Picture taken July 5, 2019. REUTERS/Valentyn Ogirenko

An employee of the State Agency of Ukraine on Exclusion Zone Management shows Ukrainian military pilot Mykola Volkozub the radiation level next to the Chernobyl nuclear power plant, in Chernobyl, Ukraine July 5, 2019. Picture taken July 5, 2019. REUTERS/Valentyn Ogirenko

A radiation sign is seen in the Lynas Advanced Materials Plant in Gebeng, Pahang, Malaysia, July 23, 2019. Picture taken on July 23, 2019. REUTERS/Lim Huey Teng

A radiation sign is seen in the Lynas Advanced Materials Plant in Gebeng, Pahang, Malaysia, July 23, 2019. Picture taken on July 23, 2019. REUTERS/Lim Huey Teng

A worker holds a radiation dosimeter above the Water Leach Purification (WLP) at Lynas Advanced Materials Plant in Gebeng, Pahang, Malaysia, July 23, 2019. Picture taken on July 23, 2019. REUTERS/Lim Huey Teng

A fish placed as radiator mascot on a 1938 Lagonda sports car is seen during the Indianapolis in Oerlikon race demonstration at the Offene Rennbahn cycling track in Zurich's Oerlikon suburb, Switzerland, July 23, 2019. REUTERS/Arnd Wiegmann

Construction machinery and debris stand on the site of the Young Radiator manufacturing facility in Racine, Wisconsin, U.S., April 26, 2019. Picture taken April 26, 2019. REUTERS/Brian Snyder

The Bugatti logo is seen on the radiator of a vintage Bugatti Type 35 sports car at the company's headquarters Chateau St. Jean in Molsheim, France June 6, 2019. Picture taken June 6, 2019. REUTERS/Arnd Wiegmann

The Bugatti logo is seen on the radiator grill of a Bugatti Chiron sports car at the company's headquarters Chateau St. Jean in Molsheim, France June 6, 2019. REUTERS/Arnd Wiegmann

Krista Lindholm points to a ceiling mounted hot water radiator she says once fell and poured hot water through her basement at her home at Joint Base Lewis-McChord, Washington, U.S. May 13, 2019. Picture taken May 13, 2019. To match Special Report USA-HOUSING/MAP REUTERS/Lindsey Wasson

A screen shows global Outgoing Long-wave Radiation (OLR) at lndia Meteorological Department (IMD) headquarters in New Delhi, India, April 15, 2019. REUTERS/Anushree Fadnavis

A technician checks for radiation levels after leaving the nuclear zone at the Orano reprocessing plant in La Hague, near Cherbourg, France, April 4, 2019. REUTERS/Benoit Tessier

A technician checks for radiation levels after leaving the nuclear zone at the Orano reprocessing plant in La Hague, near Cherbourg, France, April 4, 2019. REUTERS/Benoit Tessier

A radioactive particle collected from the Fukushima fallout zone is prepared for analysis by Silvia Cipiccia, beamline scientist, at Diamond Light Source, Britain's national synchrotron, or cyclic particle accelerator, in Didcot, near Oxford, Britain November 16, 2018. Picture taken November 16, 2018. REUTERS/Matthew Stock

Tom Scott from the University of Bristol and Silvia Cipiccia, beamline scientist, are seen at Diamond Light Source, Britain's national synchrotron, or cyclic particle accelerator, in Didcot, near Oxford, Britain November 16, 2018. Picture taken November 16, 2018. REUTERS/Matthew Stock

Tom Scott from the University of Bristol and Dr Yukihiko Satou from the Japan Atomic Energy Agency (JAEA) are seen at Diamond Light Source, Britain's national synchrotron, or cyclic particle accelerator, in Didcot, near Oxford, Britain November 16, 2018. Picture taken November 16, 2018. REUTERS/Matthew Stock

Tom Scott from the University of Bristol, Dr Yukihiko Satou from the Japan Atomic Energy Agency (JAEA) and Silvia Cipiccia, beamline scientist, are seen at Diamond Light Source, Britain's national synchrotron, or cyclic particle accelerator, in Didcot, near Oxford, Britain November 16, 2018. Picture taken November 16, 2018. REUTERS/Matthew Stock

An employee of Tokyo Electric Power Co's (TEPCO) wearing protective suit and mask is seen inside a radiation filtering Advanced Liquid Processing Systems, known as ALPS, at tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan February 18, 2019. Picture taken February 18, 2019. REUTERS/Issei Kato

A geiger counter measures a radiation level of 54.0 microsievert per hour near the No.2 and No.3 reactor buildings at Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan February 18, 2019. Picture taken February 18, 2019. REUTERS/Issei Kato

A rust-spotted Geiger counter, measuring a radiation level of 0.182 microsievert per hour, is seen between weeds at an area damaged by the March 11, 2011 tsunami, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant, in Namie town, Fukushima prefecture, Japan February 19, 2019. Picture taken February 19, 2019. REUTERS/Issei Kato

Employees of Tokyo Electric Power Co's (TEPCO) wearing protective suits are seen inside a radiation filtering Advanced Liquid Processing Systems, known as ALPS, at tsunami-crippled Fukushima Daiichi nuclear power plant in Okuma town, Fukushima prefecture, Japan February 18, 2019. Picture taken February 18, 2019. REUTERS/Issei Kato

Laboratory staff members chop fish while preparing it for radiation measurement testing at Matsukawaura fishing port in Soma, Fukushima prefecture, Japan February 20, 2019. Picture taken February 20, 2019. REUTERS/Issei Kato

A laboratory staff member chops fish while preparing it for radiation measurement testing at Matsukawaura fishing port in Soma, Fukushima prefecture, Japan February 20, 2019. Picture taken February 20, 2019. REUTERS/Issei Kato

A rust-spotted Geiger counter, measuring a radiation level of 0.182 microsievert per hour, is seen between weeds at an area damaged by the March 11, 2011 tsunami, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant, in Namie town, Fukushima prefecture, Japan February 19, 2019. Picture taken February 19, 2019. REUTERS/Issei Kato

A Geiger counter, measuring a radiation level of 0.178 microsievert per hour, is seen between weeds at an area damaged by the March 11, 2011 tsunami, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant, in Namie town, Fukushima prefecture, Japan February 19, 2019. Picture taken February 19, 2019. REUTERS/Issei Kato

A cancer patient lies in the radiation therapy room at the National Oncology Centre in Sanaa, Yemen, August 8, 2018. REUTERS/Khaled Abdullah SEARCH "YEMEN CANCER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A radiation monitoring post measuring a radiation level of 0.116 microsievert per hour is seen at J-Village, a national soccer training complex that used to serve as an operation base for battling Japan's nuclear disaster, in Naraha Town, Fukushima Prefecture, Japan July 30, 2018. REUTERS/Issei Kato

Map showing the latest status of restricted areas affected by radiation from the Fukushima nuclear plant.

A radiation monitoring post measuring a radiation level of 0.167 microsievert per hour, is seen at Tomioka Daini Junior High School, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant, in Tomioka town, Fukushima prefecture, Japan May 17, 2018. Picture taken May 17, 2018. REUTERS/Toru Hanai

Tour guide Katsuaki Shiga (R) and a tourist check radiation levels at Joroku Park, near Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant, in Namie town, Fukushima prefecture, Japan May 17, 2018. Picture taken May 17, 2018. REUTERS/Toru Hanai

An employee measures the radiation level near a damaged fourth reactor at the Chernobyl nuclear power plant in Chernobyl, Ukraine April 20, 2018. REUTERS/Gleb Garanich

An employee measures the radiation level as journalists take pictures at a control centre of the stopped third reactor at the Chernobyl nuclear power plant in Chernobyl, Ukraine April 20, 2018. REUTERS/Gleb Garanich

Laundry lies in a corridor at Hotel Schwalbe in Vienna, Austria, April 11, 2018. REUTERS/Heinz-Peter Bader

Puerto Rican Nydia Irizarry, 45, shows photographs of her daughter Keyshla Betancourt, 22, who suffers from brain cancer, as she receives treatment for cancer at a hospital in Puerto Rico, in Orlando, Florida, U.S., December 6, 2017. Keyshla came from Puerto Rico in October on a humanitarian flight with her mother and 11-year-old brother Felix Rodriguez after Hurricane Maria hit the island in late September. Suffering with the blood cancer HodgkinÕs Lymphoma, Betancourt was deteriorating fast on an island where hospitals have been badly damaged, doctors and nurses have emigrated and electricity outages are still widespread. She is now on Florida's Medicaid plan, which pays for her daily radiation treatments. Living in a cramped Orlando hotel room, the family has no plans to return to the island. "We are staying for good," Betancourt said. "I cannot get the best medical help in Puerto Rico, and it has become even worse after Hurricane Maria." REUTERS/Alvin Baez SEARCH "PUERTO RICO FLORIDA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Puerto Rican Keyshla Betancourt, 22, who suffers from brain cancer, takes off her wig after her first radiotherapy treatment, at a hotel, in Orlando, Florida, U.S., December 11, 2017. Keyshla came from Puerto Rico in October on a humanitarian flight with her 45-year-old mother Nydia Irizarry and 11-year-old brother Felix Rodriguez after Hurricane Maria hit the island in late September. Suffering with the blood cancer HodgkinÕs Lymphoma, Betancourt was deteriorating fast on an island where hospitals have been badly damaged, doctors and nurses have emigrated and electricity outages are still widespread. She is now on Florida's Medicaid plan, which pays for her daily radiation treatments. Living in a cramped Orlando hotel room, the family has no plans to return to the island. "We are staying for good," Betancourt said. "I cannot get the best medical help in Puerto Rico, and it has become even worse after Hurricane Maria." REUTERS/Alvin Baez SEARCH "PUERTO RICO FLORIDA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Puerto Rican Nydia Irizarry (R), 45, puts her head on her 22-year-old daughter Keyshla Betancourt's, shoulder who suffers from brain cancer, at a restaurant after Keyshla's first radiotherapy treatment, in Orlando, Florida, U.S., December 11, 2017. Keyshla came from Puerto Rico in October on a humanitarian flight with her mother and 11-year-old brother Felix Rodriguez after Hurricane Maria hit the island in late September. Suffering with the blood cancer HodgkinÕs Lymphoma, Betancourt was deteriorating fast on an island where hospitals have been badly damaged, doctors and nurses have emigrated and electricity outages are still widespread. She is now on Florida's Medicaid plan, which pays for her daily radiation treatments. Living in a cramped Orlando hotel room, the family has no plans to return to the island. "We are staying for good," Betancourt said. "I cannot get the best medical help in Puerto Rico, and it has become even worse after Hurricane Maria." REUTERS/Alvin Baez SEARCH "PUERTO RICO FLORIDA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Keyshla Betancourt, 22, lies on a bed after her first radiotherapy treatment, at a hotel where she lives in Orlando, Florida, U.S., December 11, 2017. Keyshla came from Puerto Rico in October on a humanitarian flight with her 45-year-old mother Nydia Irizarry and 11-year-old brother Felix Rodriguez after Hurricane Maria hit the island in late September. Suffering with the blood cancer HodgkinÕs Lymphoma, Betancourt was deteriorating fast on an island where hospitals have been badly damaged, doctors and nurses have emigrated and electricity outages are still widespread. She is now on Florida's Medicaid plan, which pays for her daily radiation treatments. Living in a cramped Orlando hotel room, the family has no plans to return to the island. "We are staying for good," Betancourt said. "I cannot get the best medical help in Puerto Rico, and it has become even worse after Hurricane Maria." REUTERS/Alvin Baez SEARCH "PUERTO RICO FLORIDA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Firefighters are pictured at the control centre during an emergency drill called "Gamma 2017" to practise their response in case of a radioactive incident at the Helmholtz nuclear research reactor in Berlin, Germany, October 14, 2017. The word reads, "radiation protection." REUTERS/Fabrizio Bensch

The logo of International brand commercial trucks, owned by Navistar, is pictured at the radiator grill of a truck at the manufacturing plant in Escobedo, on the outskirts of Monterrey, Mexico, June 29, 2017. Picture taken June 29, 2017. REUTERS/Daniel Becerril

Radiators are placed next to a bed in Yao Guanghui's bedroom at Xiaozhangwan village of Tongzhou district, on the outskirts of Beijing, China June 28, 2017. Picture taken June 28, 2017. REUTERS/Jason Lee