Radioactive contamination

FILE - This March 11, 2012, file photo, shows three melted reactors, from left, Unit 1, Unit 2 and Unit 3 at Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture, Japan. Japan revised a roadmap on Friday, Dec. 27, 2019, for the tsunami-wrecked Fukushima nuclear plant cleanup, further delaying the removal of thousands of spent fuel units that remain in cooling pools since the 2011 disaster. (Kyodo News via AP, File)

Pope Francis shakes hands with Matsuki Kamoshita as he meets with victims of the March 11, 2011 Fukushima nuclear plant disaster in northern Japan Monday, Nov. 25, 2019, in Tokyo, Japan. (AP Photo/Jae Hong)

FILE - In this May 21, 1956, file photo, the fireball of a hydrogen bomb lights the Pacific sky a few seconds after the bomb was released over Bikini Atoll. A Texas-based company is facing criticism for naming a beer after the location of nuclear tests that resulted in the contamination of a Pacific island chain, a report said. Manhattan Project Beer Company is under scrutiny by Marshall Islanders who were exposed to high levels of radiation by U.S. government research from 1946 to 1958, The Pacific Daily News reported Thursday, Aug. 15, 2019. (AP Photo, File)

FILE - This Sept. 4, 2017, aerial file photo shows Fukushima Dai-ichi nuclear power plant reactors, bottom from right, Unit 1, Unit 2 and Unit 3, in Okuma town, Fukushima prefecture, northeastern Japan. The utility company operating Fukushima's tsunami-wrecked nuclear power plant said Friday, Aug. 9, 2019 it will run out of space for tanks to store massive amounts of treated but still contaminated water in three years, adding pressure for the government and the public to reach consensus on what to do with the water. (Daisuke Suzuki/Kyodo News via AP, File)

FILE - In this Jan. 25, 2018, file photo, an installation of a dome-shaped rooftop cover housing key equipment is near completion at Unit 3 reactor of the Fukushima Dai-ich nuclear power plant ahead of a fuel removal from its storage pool in Okuma, Fukushima Prefecture, northeast Japan. Japan has partially lifted an evacuation order in one of the two hometowns of the tsunami-wrecked Fukushima nuclear plant for the first time since the 2011 disaster. The action taken Wednesday, April 10, 2019, allows people to return about 40 percent of Okuma. The other hometown, Futaba, remains off-limits as are several other towns nearby.(AP Photo/Mari Yamaguchi, File)

FILE - The first load of nuclear waste arrives in this March 26, 1999 file photo, at the Waste Isolation Pilot Plant (WIPP) site in Carlsbad, N.M., from Los Alamos National Laboratory. Twenty years and more than 12,380 shipments later, tons of Cold War-era waste from decades of bomb-making and nuclear research across the U.S. have been stashed in the salt caverns that make up the underground facility. (AP Photo/Thomas Herbert)

A burnt car sits on the outskirts of the village of Monchique in southern Portugal's Algarve region, Monday, Aug. 6, 2018. Emergency services in Portugal say they are still fighting a major wildfire on the south coast that threatened to engulf a hillside town overnight. (AP Photo/Javier Fergo)

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